Asphalt Pro - September 2017

Lab & Testing Issue

asphaltPRO Production – Professionals – Products

Manage Tank Farm Testing Accuracies • Roll for Bonus • Your Guide to Haul Safely • AASHTO Changes Calibration

Delta Tc September 2017 www.TheAsphaltPro.com

UNMATCHED DESIGN

Heatec has been designing and building tank farms for over 40 years and each project has been unique in some way. That’s because each customer is unique. You have your own business model that may be slightly different or dramatically different from the other guys’.

That’s why at Heatec we take a comprehensive approach to designing your tank farm. That means we look at the materials you will be using, all the equipment that needs heat, the piping, and even future plans for expansion. Then we design a system that works for you.

And we make it efficient and simple to operate. Heatec is unmatched when it comes to designing heating and storage systems for your asphalt plant. To find out more about our approach, visit us at www. heatec.com or give us a call at 423-821-5200.

H E AT E C , I N C .

an Astec Industries Company

5200 WILSON RD • CHATTANOOGA, TN 37410 USA 800.235.5200 • FAX 423.821.7673 • heatec.com

CONTENTS

asphaltPRO september 2017

departments

20

Editor’s Letter 5 – Keep Mix Design Perfection Top of Mind

Around the Globe 6

SAFETY SPOTLIGHT 10 — Save on Costs with Your Professional Guide to Asphalt Mix Delivery Part 5—Haul Truck Safety Pays Dividends

By Sandy Lender

24

36

42

10

MIX IT UP 20 - Avoid Dilutive Effects of AC Storage Tank Residue

By Sandy Lender

KEEP IT UP 24 — How to Roll for Bonus Part 1—New Ideas in Roller Maintenance

By Sandy Lender

PROJECT MANAGEMENT 32 — Add Consulting to Your Project Management

By Jon Young

THAT’S A GOOD IDEA 34 — Save on Costs with Your Professional Guide to Asphalt Mix Delivery Part 6—Put the Canopy on Rails

By Sandy Lender

PRODUCT GALLERY 48 — New and Updated Paving Equipment Focuses on Quality

By AsphaltPro Staff

OFF THE MAT 60 — Fix the Handbook

By Lorraine D’Angelo

HERE’S HOW IT WORKS 62 — Roadtec’s RT-500 Mobile Recycle Trailer

Feature articles 36 — R18 Certifies Higher Calibration Costs

By Sandy Lender 40 - How to Use the Delta Tc Parameter

By Pamela Turner and Christine Hall

Lab & Testing Issue

asphaltPRO PRODUCTION – PROFESSIONALS – PRODUCTS

42 — Control Condensation in Asphalt Processing, Storage

By Amanda Williams 44 - Innovation in the Asphalt Industry Part 3—How to Get Federal Protection

By Brian Mack and Anna Quinn

Manage Tank Farm Testing Accuracies • Roll for Bonus • Your Guide to Haul Safely • AASHTO Changes Calibration

Delta Tc SEPTEMBER 2017 WWW.THEASPHALTPRO.COM

on the cover Getting material into the correct tank is just one step in preserving liquid material integrity. See related article on page 20.

Photo courtesy Heatec, an Astec Industries Company, Chattanooga.

It’s more than the high fuel efficiency.

It’s more than the 6 inch insulation.

More than the fact CEI has produced some of the most efficient asphalt heating & storage systems available, since 1969.

CEI backs its products. Period. With thorough engineering, high-quality manufacturing, dedicated service, worldwide parts support, and annual training, CEI offers you the kind of fullcircle support you’re looking for.

C E I E N T E R P R I S E S an Astec Industries Company 245 WOODWARD RD SE • ALBUQUERQUE, NM 87102 USA • 800.545.4034 • FAX 505.243.1422 • ceienterprises.com

editor’s Letter Keep Mix Design Perfection Top of Mind

After attending countless seminars on quality control/quality assurance (QC/QA) over the years, I’ve got notes in various colors of ink on various kinds of stationery that point to a similar message: don’t grow complacent. For example, once the basic plant parameters are in place for excellent mix production, you don’t want to fall into the trap of assuming all is well for the rest of a week. You may not have to test parameters as often as you did at initial startup or when introducing a new design, but you certainly won’t reduce testing to only once a day.

Experts such as John D’Angelo of D’Angelo Consulting LLC, Washington, D.C., consider changing your testing frequency acceptable if you do so in moderation. Are you testing your AC content, gradations, RICE, etc., ad nauseum? He suggested to a Colorado audience that you can cut down on some time and costs by reducing the testing frequency when everything is running with consistently good results. But he warned against letting complacency seep in.

Even when test results are consistently on target, look around the plant and yard for areas where you can still improve best practices to “up” your quality control game. Everyone knows that stockpile management is vital to controlling moisture as well as actual ingredients in mix designs. Take a look at how closely stockpiles sit to one another in your yard. It’s a good idea to make sure you can drive a truck between them to decrease the opportunities for their sized stone to mingle.

Think about another area where aggregate might mingle. Do you already have bin dividers on your cold feeds to keep material from mixing there? You probably labeled the bins a long time ago so loader operators and plant operators know exactly what material is in each bin and exactly what material needs to be refilled. Make those labels match up to signs at the stockpiles, too.

Another good idea is to put a wind screen over the weigh bridges. Give scales a fighting chance to do their jobs right.

Along with these best practice tips, this September issue on lab & testing gets deeper into the concept of block cracking on page 40 with the National Center for Asphalt Technology and offers some ideas on page 36 for handling the upcoming changes to ISO 17025 that AASHTO has adopted. There’s a little something for lab techs, company owners and the folks putting the new mixes on the ground all over this edition. Use the QC/QA hints to increase your opportunities for bonus from start to finish.

Stay Safe,

Sandy Lender

September 2017 • Vol. 10 No.10

asphaltPRO 602 W. Morrison, Box 6a

Fayette, MO 65248 (573) 823-6297 www.theasphaltpro.com Group publisher Chris Harrison chris@ theasphaltpro.com publisher Sally Shoemaker sally@theasphaltpro.com (573) 823-6297 editor Sandy Lender sandy@theasphaltpro.com (239) 272-8613 ASSOCIATE EDITOR Sarah Redohl sarah@theasphaltpro.com (573) 289-5390 Art Director Kristin Branscom business manager Susan Campbell (660) 728-5007

AsphaltPro is published 10 times per year: January, February, March/ April, May/ June, July, August, September, October, November and December by Asphalt Pro, LLC, 602 W. Morrison, Box 6a, Fayette, MO 65248.

Writers expressing views in AsphaltPro Magazine or on the AsphaltPro website are professionals with sound, professional advice. Views expressed herein are not necessarily the same as the views of AsphaltPro, thus producers/contractors are still encouraged to use best practices when implementing new advice.

Subscription Policy: Individual subscriptions are available without charge in the United Sates, Canada and Mexico to qualified individuals.

One year subscription to non-qualifying Individuals: United States $90, Canada and Mexico $125.00. For the international digital edition, visit theasphaltpro.com/subscribe-2.

www.THeAsphaltpro.com // 5

around the globe

Industry News and Happenings from Around the World China

According to the July 18 Bitumart report from Petrosil Media, Beijing Zhongwu Zhenhua Trading Co. bitumen imports were up by 60 percent in May compared to imports in April.

Germany

Continental Commercial Specialty Tires (CST), headquartered in Hannover, is expanding its workforce in the Americas, adding two field engineers: Albert Sumeras for the USA and Canada territory; Robert Reid for the South America and Mexico territory. The new positions are part of the growth strategy CST 2025.

India

More than 200 senior industry decision makers attended the first Asia, Middle East and Africa (AMEA) Bitumen Conference July 12 through 13 in Mumbai. Petrosil and Rex Fuels jointly organized the event, which saw support from such global companies as Binas Energy, Frontier Bitumen, Ruma Engineering and more.

Colorado

David Spector, director of the Colorado High Performance Transportation Enterprise (HPTE), received the P3 Entrepreneur of the Year award from the American Road & Transportation Builders Association (ARTBA) for his contributions to the forward progress of P3 in the U.S. transportation industry.

Florida

• The sixth annual Construction Angels golf tournament takes place Sept. 29 at the Woodlands Golf Course & Country Club in Tamarac, Florida. Then plan ahead to support the Construction Angels at Doc Reno’s Bacon, Blues & Brews 2017 at the Bergeron Rodeo Grounds in Davie, Florida, Oct. 14. Visit constructionangels.us for all event information.

• The I-595 Corridor Improvements in Florida has received the P3 Project of the Year from the American Road & Transportation Builders Association (ARTBA) and represents the state’s largest transportation project and first P3.

Kentucky

The International Construction & Utility Equipment Exposition (ICUEE) 2017, which is also known as The Demo Expo, will be held Oct. 3 through 5 at the Kentucky Exposition Center in

6 // September 2017

Louisville. This expo focuses on the job needs of utilities and utility contractors, and features 25 acres of exhibits to explore.

Minnesota

Plan now to attend the 2017 semi-annual meeting of the Asphalt Recycling and Reclaiming Association (ARRA) Oct. 16 through 19 in Minneapolis. The meeting will include a tour of the MnROAD Pavement Test Track. Get registration info at www.ARRA.org.

Missouri

Tennessee

As everyone wrapped up the CONEXPO-CON/ AGG experience this spring, the Tennessee Association of Manufacturers (TAM) had its annual recognition of companies that exemplify practices that result in manufacturing excellence.

The association named Roadtec Inc., headquartered in Chattanooga, as the winner of the Company of the Year Excellence Award. John J. Irvine III, president of Roadtec, stressed the company’s commitment to safety, community and stewardship when discussing the honor.

Your AsphaltPro staff, Fayette, Missouri, has teamed up with hall-of-famer industry consultant John S. Ball III of Top Quality Paving & Training, Manchester, New Hampshire, to bring you an online training course for each member of your asphalt paving crew. Check out free previews of lessons or get started by clicking the green “enroll” button at http://training. theasphaltpro.com/p/asphalt-paving-101.

Texas

Ohio

Wisconsin

• Dynapac North America LLC, Rock Hill, South Carolina, welcomes Gibson Machinery LLC of Cleveland, Ohio, to its dealer network. The family-owned company specializes in heavy equipment for construction and more, and will rent, sell and service Dynapac pavers, soil compactors and asphalt rollers in Northern Ohio. Learn more about Gibson at www.gibsonmachinery.com.

• The 8th Shingle Recycling Forum, the biennial event that brings together all stakeholders in the growing asphalt shingle recycling industry, will take place Oct. 17 through 19, at the Westin Cincinnati. The event will include a tour of a shingle recycling facility and a hot mix plant using RAS. Get registration info at www.ShingleRecycling.org.

Pennsylvania

Mowery Construction, Mechanicsburg, Pennsylvania, announced in July that the company’s president, David Cross of York, is the company’s new owner. He will hold both owner and president responsibilities moving forward since purchasing Mowery from the company’s former owner, Donald Mowery, who will continue to work with the team in a consulting, client relations and business development role.

The deadline to apply for the HCSS 2017 Construction Intern of the Year is Sept. 15, and online popular voting begins Sept. 19. In mid-November, HCSS will award a total of $50,000 in college scholarships to 17 students who completed an internship with construction companies. Eligible students should visit www.constructioninternawards.com to register.

• The Association of Equipment Manufacturers (AEM) has elected Philip Kelliher, the vice president Americas & Europe distribution service division of Caterpillar Inc., and David Thorne, the senior vice president worldwide sales & marketing construction & forestry division of Deere & Company, to the AEM CE Sector Board to fill unexpired terms.

• The Demo Expo is again teaming up with the Call of Duty™ Endowment, Milwaukee, for an industry-giveback benefit auction at the ICUEE 2017. The Endowment is a nonprofit organization to help military veterans secure quality employment and to raise awareness of the value vets bring to the workplace. The benefit auction will take place Oct. 5 from noon to 2 p.m. on the ICUEE Demo Stage.

Washington, D.C.

The Transportation Research Board (TRB) is sponsoring the Tenth SHRP 2 Safety Data Symposium: From Analysis to Results this Oct. 6 in Washington, D.C. The symposium exhibits current research projects and serves as a forum for the exchange of ideas among researchers and practitioners from the private and public sectors. Visit http://www.trb.org/conferences/ TenthSHRP2SafetyDataSymposiumRegistration.aspx to register.

A FULL LINE OF EQUIPMENT & PRODUCT SUPPORT SOLUTIONS FOR ALL YOUR ROAD BUILDING NEEDS. PAVERS | MTVS | COLD PLANERS | STABILIZERS BROOMS | COMPETITIVE PARTS | GUARDIAN

© 2017 ROADTEC.INC. ALL RIGHTS RESERVED

roadtec.com 1.800.272.7100 423.265.0600

Dedicated to Success.

safety spotlight

In this picture, you can see extra lights and mirrors on the front of Murray’s truck. He includes lights atop the mirrors and at the corners of the body. Convex mirrors provide extra visibility of areas that would otherwise be blind spots. All photos courtesy John Ball, Top Quality Paving & Training, Manchester, New Hampshire.

Save on Costs with Your Professional Guide to Asphalt Mix Delivery Part 5—Haul Truck Safety Pays Dividends Editor’s Note: A few of the ideas in this article involve adding lighting and other elements to the haul truck. Make sure any aftermarket safety equipment is installed in accordance with the manufacturer’s specs. Then be sure to test it for proper operation before going into the field. Include aftermarket devices in routine maintenance and pre-shift walk-arounds just as you would check on standard equipment.

For the 2017 paving season, we dive into an essential area of project management for asphalt professionals: safe and timely delivery of hot-mix or warm-mix asphalt (HMA/ WMA) to the paving site. During this eight-part series, you’re get-

F

10 // September 2017

ting some back-to-basics best practices to share with veteran and new haul truck drivers, in addition to new tips, ideas, and case studies with logistics and technology that will enhance your bottom line. Producers have streamlined processes at the plant; contractors have nailed down best practices in the work zone. Now it’s time to harness the potential you’ve been missing when it comes to mix delivery and haul truck fleet management.

This fifth installment examines a number of safety standards, as well as options, that fleet managers should have on their radar. Independent driver Steve Murray of Steve Murray Trucking in Hooksett, New Hampshire, and paving consultant John Ball of Top Quality Paving &

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safety spotlight

Every truck driver should have the basics for safety. Make sure you double-check the expiration date on your fire extinguisher as part of your weekly routine maintenance. One of these days, you’ll need to replace it. Also notice the coffee can Murray keeps under his step. That’s not coffee. He keeps an assortment of nuts, bolts and screws in the can. The pipe you see under there is used at the back of the truck for leverage to open the chute to facilitate handwork.

This driver, who will remain anonymous, did not align the body correctly under the silo for loadout. Luckily, he was positioned so that mix fell on the back end of the truck—and onto the scale where plant personnel had to bring in a skid steer for cleanup—and not on the cab. The cooled mix presents a hazard to drivers behind the truck and threatens material segregation when it falls into the hopper. While the driver has reflective tape along the top and sides of the back end for additional safety, that feature is partially hidden by his poor loadout skill and negligence. If you experience a slip-up at loadout, stop. You must stop and clean up any mess before you endanger motorists and yourself on the roadway.

12 // September 2017

Training of Manchester, New Hampshire, took time to photograph specific elements of Murray’s 2007 Kenworth triaxle and to share the good ideas that increase its visibility and safety on the road and on the job.

“Steve is all about safety and doing his job the right way,” Ball said. “His truck is 110 percent suitable for asphalt pavers.”

Before they went to a local plant to start shooting, Ball provided the following list of safe and sensible trucking guidelines for drivers.

• Attend a pre-job preparation meeting to get informed on project details, the project scope and route directions. Know where, when and how to get to the work zone because we want all drivers taking the same, most-efficient route.

• Double-check that the back-up alarm, of at least 90 decibels, is on and functional, which you should have checked during your preshift inspection of your vehicle (see part 1 of the series).

• Do not let the plant overload your truck. Your vehicle has a registered gross vehicle weight and your state department of transportation (DOT) has weight limits for different roadways you will travel. Know and obey these limits. Provide the weight of your truck to the plant so your vehicle is in the system.

• Put a tarp or canvas on your load to protect the public from falling debris and to protect your perishable product from heat loss.

• Headlights and a visible 360-degree beacon or strobe, as well as 4-way flashers, must be on before you leave the plant.

• All trucks must have a clean and visible “Construction Vehicle— Do Not Follow” sign.

• All drivers must stay with their trucks. Safety vests and hardhats should be worn at all times when you’re out of your vehicle.

• No unauthorized U-turns will be made at any time. Obey all state and city traffic laws.

• CB radios, company radios or cell phones should be used for legitimate business purposes only. Think safety first.

• Obey all requests of the project manager, traffic control and highway officials/troopers. Traffic control runs the job.

• Use caution when backing and do not back up until you get direction from your dump man. He will likely have a different color vest than other workers. Look out for people, vehicles and property. Use both mirrors.

• Trucks leaving the paver should pull out to the left, allowing the next loaded truck to back up to the paver. The truck leaving the paver should go directly to the designated clean-out area.

• If you have any questions, don’t hesitate to ask the project manager or plant superintendent. If you’re unsure of something, ask.

The safety feature Murray considers most important on his truck is the mirrors. “I would say it’s the mirrors. You’ve got to be able to see where you’re backing up.”

He includes the mirrors as a point on the pre-shift inspection, which we covered in the first part of this series in the July issue. Although Murray keeps his truck in a large garage bay overnight, he still takes the time to clean off the mirrors—and windows—before the start of the day. He also has convex mirrors to help him see what’s in front or on the side of his truck. Ball said to think of the convex mirrors you see on school buses. It’s the same principle.

To increase their efficacy, the mirrors are heated electrically.

There are heated bands on the back of the mirrors. When it’s a cool morning, Murray doesn’t have to worry about fog or condensation distorting his view.

The safety feature Murray considers the coolest on his truck is the lighting package. “You can see this thing comin’ for miles,” he said. Lights play a role in safety during night and day operations, and they deserve some extra attention, like keeping them clean.

Light It Up

“At night, his truck is lit up like a Christmas tree,” Ball said proudly. “He has a strobe light system on the mirrors and on the top of the cab, and the back.”

“I have special backup lights,” Murray said. “I have a light that tells me if the tailgate is open.”

Check out the pictures on these pages for examples of extra lighting Murray has added to increase visibility and safety. But keep in mind, not all light is the same. In his paper “Maximum Efficiency of White Light,” published July 31, 2011, physicist Tom Murphy came to the conclusion that, “the most perfectly engineered light that we would perceive as ‘white’ cannot achieve much more than about 250 lm/W.” You can watch a short video about LEDs and their positive effect on luminous efficacy at https://www.youtube.com/ watch?v=8CkXFVi3vU4.

lumen (lm)—a measure of light level the human eye can sense; 1 lumen = 1 candle’s light from a distance of 1 foot Watt (W)—a measure of power input; energy input luminous efficacy (lm/W)—lumens per watt of light output (also called lamp efficacy) From strobes to amber lights to LEDs, getting the system installed correctly requires the right hardware and wiring expertise. If you aren’t an electrical engineer, don’t let that stop you from adding safe lighting packages to your rig. Hire the help you need to make your vehicle the best it can be.

Don’t forget the easy safety add-on of reflective tape. The alternating red and white stripes catch the beams from headlights to alert motorists of your presence.

Prevent Backovers

The Work Zone Safety Information Clearinghouse confirms that “about two-thirds of road worker deaths” are caused by runovers and backovers. “More than half are by construction vehicles and equipment—especially dump trucks.”

The U.S. Department of Transportation (DOT) Federal Highway Administration (FHWA) had specifics at its Work Zone Management Program website showing the primary causes of worker fatalities from 2005 to 2010 were as follows: • Runovers/Backovers (often by dump trucks): 48% • Collision between vehicles/Mobile equipment: 14% • Caught in between/Struck by construction equipment and objects: 14%

To increase visibility of a percentage of the area behind the haul truck, drivers and fleet managers can install wireless or wired backup camera systems with either black-and-white or full color display screens in truck cabs. Options in today’s marketplace cover the gauntlet, with robust protective covers, like the one you see here, for the cameras used on construction projects.

The Facts and Statistics section of the Worker Safety page showed, “Each year over 20,000 workers are injured in road construction work zones….There were 106 workplace fatalities at road construction sites in 2010. Fatalities at road construction sites typically account for 1.5 to 3 percent of all workplace fatalities annually.”

To decrease the likelihood that your large vehicle will be involved in one of those tragedies, you must be on high alert in the work zone. Carrying asphalt mix to the paver will require some amount of time when you’re backing toward the paver. It’s a necessary part of the job. In the August issue’s third part of this series, we discussed making and keeping eye contact with the dump man, as well as best practices for backing to the paver with guidance from the dump man and paver operator. Remember: if you lose eye contact or communication with the dump man, stop the truck. Don’t move until you have regained eye contact with the dump man.

Now let’s take a look at some additional tools and devices designed to enhance safety when backing a haul truck.

The ITCP—Every project should include an internal traffic control plan (ITCP), which you will receive from the safety director or foreman on the job. This plan will be a diagram that shows equipment location and direction of movement. It will also show where ground personnel will be located in relation to equipment. Its purpose is to coordinate the flow of both equipment and workers. Study it so you know where you are expected to enter the work zone, if there is an area where you will be expected to turn around, where you will line up with other haul trucks, where you will be backing, where you will be allowed to clean out the truck body, and where you will be allowed to exit the work zone to return to traffic.

ITCP = internal traffic control plan Get the ITCP from the safety director or foreman on the job.

www.THeAsphaltpro.com // 13

safety spotlight

Murray has six lights on each side of the body’s frame.

The LEDs attached to the frame provide light when the body is raised.

Murray’s truck has LEDs installed so that they shine down from the tarp/canopy track; this illuminates and outlines the side of the truck.

The placement of this oval-shaped LED allows it to shine toward the paver, illuminating the wheels and the area where the paver’s push roller will come in contact with the back tire. The driver wants to see that there is nothing between his vehicle and the paver as he’s backing.

14 // September 2017

If the project will span multiple days, check with the foreman in charge of trucking when you clock in about any revisions to the plan. If the traffic flow has changed, your ITCP will be out of date.

Mirrors—As Murray mentioned above, the mirrors are vital to safe backing. If you see a ground worker in the mirror, stop. You can’t be sure that person is walking across the path of the backing haul truck in a straight line with no stopping or tripping. The dump man needs to give the “all clear” before you continue backing.

Technologies—The Centers for Disease Control and Prevention define a blind area as “the area around a vehicle or piece of construction equipment that is not visible to the operators, either by direct line-of-sight or indirectly by use of internal or external mirrors.” Some technologies that help you “see” what’s behind the truck include proximity detection devices, tag-based systems, and backup cameras. Of course, a proximity detection device such as radar or sonar on the back of the haul truck will detect the paver and sound its alarm as you close in on the tractor, desensitizing you to its warning over time.

The U.S. Department of Labor’s OSHA website reminded us “[t] ag-based systems can inform drivers when other employees are behind the vehicle and can alert employees when they walk near a vehicle equipped to communicate with the tag worn by the employee.”

Cameras—The backup camera serves as an extra eye. You may have seen the blind spot diagrams that various OEMs and organizations have put together for construction equipment such as milling machines and motor graders. As far back as 2004, David E. Fosbroke in the Division of Safety Research at NIOSH gave a presentation at the Roadway Work Zone Safety & Health Conference in Baltimore that included different methods of how those diagrams were created. He shared the example of a 54,000-pound, Ford 880 dump truck that was 7 feet, 10 inches wide and 23 feet, 2 inches long, and which researchers used to find the typical blind areas for haul truck drivers.

It’s no surprise that researchers found huge swaths of ground to either side of and behind the truck are not visible to the driver, even when the driver uses the mirrors on the sides of the cab. This means the dump man at the paving site must function as the driver’s additional eyes. A backup camera that transmits to an in-cab display can provide clarity as well. Most manufacturers offer these in wireless or traditional configurations to get their information to the cab display. Some offer a warning sound to get the driver’s attention if the camera detects an object—or person—in its range.

Not only does the backup camera’s display let you see objects behind your vehicle, many provide “zones” so you can determine how close the object is to your tailgate. Other options include voice activation so you can hear when someone behind the truck calls out a warning.

Training—According to the Bureau of Labor Statistics, over 70 workers died from backover incidents in 2011. These kinds of incidents can occur in different ways. The osha.gov site shares this example: “On June 18, 2009, an employee was working inside a work zone wearing his reflective safety vest. A dump truck operating in the work zone backed up and struck the employee with the rear passenger-side wheels. The employee was killed. The dump truck had an audible backup alarm and operating lights. (OSHA Inspection Number 313225377).”

safety spotlight Tires with good tread also have a better coefficient of static friction between them and the road surface. Remember, the coefficient of kinetic friction will be less when the pavement is wet, slick, dirty, etc., thus stopping time will be affected. The friction force of the road works on the tire to slow the truck to a stop, to reduce the truck’s kinetic energy to zero. The friction force of the road works better on a tire in good condition.

More than tire condition contributes to your stopping power, of course. You will include your brakes in the pre-shift inspection each day, and then consider your driving habits.

Short Elliott Hendrickson Inc. (SEH®) of St. Paul, Minnesota, prepared the lengthy article “The Truth About Speed Limits, Explained by an Engineer” for its consulting website. In that article, Morgan Abbott, P.E., explained that road classifications and prevailing speeds play into a DOT’s decision to raise or lower a roadway’s speed limit, but all decisions are made for the traveling public’s safety.

It behooves you to drive at—or slightly below—the posted speed limits along your route. Remember, your 54,000-pound vehicle weighs an additional 20 tons when you’re on your way to the work zone. It will take longer to stop when you see a problem in front of you.

Do You Hear What I Hear?

In addition to “no speeding,” ARTBA’s workzonesafety.org inOne of the mandatory devices on the haul truck is the backup alarm, cludes a number of back-to-basics driving tips, including: also called a reverse alarm. Murray’s truck has a 95-decibel backup • Make sure all cargo is secured before startup. alarm. Every haul truck must have one and it must be functioning.

• Check all your safety equipment/devices before startup.

ARTBA found that “[a]larms were inoperable in 28 percent of fatal• Wear your seatbelt. It’s mandatory. ities.” If something is wrong with yours, then you aren’t ready to work.

• Be careful when changing lanes; change only when necessary.

Ball reminded readers that some project managers are required • Keep a safe distance from vehicles in front of you. to kick the truck off the job if you arrive with a non-functioning • Be especially cautious at rail crossings. backup alarm. That means the load of cooling mix is your financial • Don’t eat, drink or talk/text on the cell phone while you’re driving responsibility. or backing into the paver.

“If the truck arrives on the job with no backup alarm, you’re dis• Back up as little as possible (refer to the ITCP for guidance). missed immediately,” Ball said. “I don’t want to hear any excusOther basics you want to be aware of include cleanliness. Ball is a es. The driver can only be allowed stickler for keeping all heavy equipback on the job when I see a receipt ment clean to improve your infor the repair.”

Remember: if you lose eye spection and routine maintenance success. He also recommended contact or communication with Down to Basics the haul truck driver take the time the dump man, stop.

Outside of the work zone, an imto clean out the cab to keep trash, portant element of safe driving is soda cans, papers, asphalt and othwhat you’re driving on. When was er items from falling under the the last time you checked your tires? The tires are an item on the daibrake pedal or making pedals slippery and messy. As Murray indily pre-shift inspection list for important reasons: worn tread poses a cated earlier in this article, you’ll want to keep mirrors and windows safety risk when you reach high speeds and poor tire pressure affects clean—and free of cracks—so you always have a good view of your driving performance. Murray puts 100 pounds of pressure in each of surroundings. his tires. He also refuses to skimp on replacements when it’s time to As you can see, operating a haul truck safely takes attention to all change tires. the details. It starts with the pre-shift inspection to ensure all the “I don’t run recaps on the tires,” he said. For the 2017 construction safety devices, as well as regular truck components, are functionseason, he put eight new tires on the rig for a cost of around $3,000. ing properly. Standard features on the haul truck are in place to proHe said it’s an investment in safety. While a company’s accounting vide the basics for safe and efficient operation, but you can add more department may view the use of retread or recapped tires as a way to lights and more features to enhance your safe working environment. save a few dollars, those tires wear down in short order. “If you blow a Next month we’ll look at the loadout and delivery operation at recap while you’re out on a job, you’re wasting money in downtime.” one large facility for specific ideas that can improve your fleet manIf a fleet manager elects to use the softer rubber of a recapped tire, agement. Management there has taken fleet management, loadout our experts suggested those be used only on the back. “Never run reand delivery to new, safe, automated heights. cap on the front tires,” Ball warned.

– By Sandy Lender Even though the ground worker wore a reflective vest, the driver didn’t see him in the blind spot. The U.S. Department of Labor’s OSHA website spells out specifics for avoiding backover tragedy.

One idea in the area of training focuses on the ground personnel gaining a new perspective.

Ball said this is a great idea for new employees, of course, but also for the veteran employee who feels invincible.

“Training is another tool to prevent backover incidents,” the OSHA website reports. “Blind spots behind and around vehicles are not immediately obvious to employees on foot. By training employees on where those blind spots are and how to avoid being in them, employers can prevent some backover incidents. One component of this training can include putting employees who will be working around vehicles in the driver’s seat to get a feel for where the blind spots are and what, exactly, the drivers can see.”

You can look up the blind area diagrams for 43 specific pieces of construction equipment at this link: https://www.cdc.gov/niosh/ topics/highwayworkzones/bad/imagelookup.html

16 // September 2017

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The Astec Advanced Customer Schools cover more than any other asphalt industry training school. Expect to enhance your grasp of key aspects of plant maintenance and operation through a unique combination of lectures and extensive hands-on classes.

Instructors include Astec and Heatec engineers and service technicians with decades of field experience. Breaks and evening events offer the opportunity to exchange information with fellow students, as well as with Astec service professionals and engineers.

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Operating Four UNIDRUM Plants

mix it up

Avoid Dilutive Effects of AC Storage Tank Residue With specs for polymer-modified liquid asphalt cement (PMA) more exacting today than they were a dozen or so years ago, you want to confirm material specifications. You want to be certain of what each tank at your facility holds.

During The Association of Modified Asphalt Producers’ (AMAP) Modified Asphalt Workshop held in Tampa in February, Ron Corun of Axeon Specialty Products presented “Handling Modified Binders (Contractor’s View)” for a colleague. Corun shared with the audience the concept of residue in a tanker truck diluting new material pumped into the tanker.

What readers may find surprising is the seemingly small remnant it takes to affect the new material. As little as 6 inches of material remaining in the tanker can dilute your new material by 7 percent, according to Corun.

W

Percentage of Total Load

Residue as Percent of Load 10.00% 8.00% 6.00% 4.00% 2.00% 0.00%

1

2 3 4 Inches of Residue

5

6

Source: AMAP 2017

The obvious best practices to keep such contamination at bay are to ensure the tanker truck is completely empty before loading at the terminal, and ensure you load from the correct loading arm at the terminal. Once at the plant, the trucker should make sure he pumps into the correct tank. It’s best to use dedicated tanks for material, but if you can’t, follow these steps that Corun recommended: • Ensure the tank to be filled is completely empty of previous material; and • Add two or three full loads of PMA before testing (or using) the new material.

The strict specifications alluded to above are why the plant operator should pay close attention to AC deliveries to the plant, and why he should implement best practices at the plant’s tank farm.

Consider this: You don’t want to pull a sample of one load of PG7022 modified with styrene butadiene styrene (SBS) from Supplier ABC from a tank that has remnants of PG64-22 modified with SBS from Supplier XYZ. Not only will the previous material dilute the new, but industry experts strongly recommend against mixing modified asphalts from different suppliers. If the suppliers use different polymer technologies, which is a logical assumption, those technologies may not be compatible, resulting in polymer separation in the tank. The testing you do of that material isn’t going to pass muster.

20 // September 2017

At the plant, the tank farm should have clear labeling on tanks and valves to lessen the opportunity for error. Check out the November issue of AsphaltPro for the full story on Milestone’s new plant and tank farm for best practices in many areas of production. Photo courtesy Astec Industries, Chattanooga, Tennessee Lennie Loesch, president of Stanteel/Hotmix Parts and Service, Louisville, Kentucky, shared that combining two grades of asphalt cement (AC) in one tank won’t offer the properties of either liquid.

“You’ll have a kind of ‘mixed breed’ of liquid AC,” he said.

Let’s discuss the ramifications of residue in delivery tankers and storage tanks, and how to avoid its dilutive effects.

Equip the Tank Farm for Success

Technical Sales and Market Development Manager for Kraton Performance Polymers, Chris Lubbers, presented “Polymer-Modified Asphalt 101” at the Arizona DOT + Local Agency Training Seminar in November 2014 with some good ideas for producers to establish a quality control plan to prevent performance grade asphalt contamination and failing test results. The ideas are still good three years later.

First: Identify all hardware by labeling or numbering • tanks, • pumps, • piping,

• valves, • sample points and • heat system.

Second: Establish standard procedures (and hardware settings) for asphalt flow into storage and into the plant.

At the 2016 World of Asphalt conference, Corun presented “Introduction to Modified Asphalt Binders,” in which he shared good ideas for the asphalt pump specifically. He pointed out that the PMA, being more viscous than unmodified AC, will cause a higher amperage draw on the AC pump. Corun recommended calibrating yours two or three times a year. Use a clean strainer with larger-than-standard holes— Corun suggested ¼-inch, stating a 10-mesh is likely to clog with the polymer network.

For best pump operation, he suggested the plant operator circulate the unmodified asphalt first, before start-up. Then switch to PMA and circulate that before start-up. At the end of the shift, switch back to unmodified asphalt and circulate that through the pump after shutdown.

Industry experts have stated at more than one industry conference to beware of using direct-fire heaters with modified asphalts. Lubbers specifically shared that the direct-fire heat tubes could develop hot spots that “immediately destroy the polymer network in the asphalt.”

Rick Jay of Process Heating Company (PHCo), Seattle, explained, “Asphalt, and to an ever greater extent modified asphalt, are sensitive to overheating. Overheating causes burning, coking, build-up on the heater sheath and damage to the liquid. In my mind, it’s really no different than overcooking a pot of food on your stove and scorching or burning it.”

PHCo is one OEM that offers a solution for producers. “Our Low Density heat, which we use on all our immersion heaters, keeps the heater sheath temperature low. Our typical Watt density is 3 Watts per square inch. We have measured the heater sheath temperature when operating and it’s about 20 degrees F over the liquid temp. We’ve found this to work well for all asphalts including modified. If there are specialty applications needing even lower sheath temperatures, we can do that as well. Direct fire systems are many, many times higher heat density.”

The more tanks a producer has on site, the more opportunity he offers the truck driver to deliver material to the wrong tank. In the asphalt industry, we have a number of methods for ensuring the right material is delivered to the right tank, and each method depends on a system of communication.

“Our industry has a huge range of sophistication,” Loesch said. “As an example, some truck drivers need to check in with the plant manager before unloading. Some of them have an automated system.”

A spokesperson for Heatec, an Astec Industries Company, Chattanooga, Tennessee, shared: “In an automated system, the valves have actuators that automatically open and close the valves in the proper order. The driver or operator selects the tank that they want to fill on a control panel by the unloading station. The customer also has the option to mount the controls in the plant control room or both. With the controls mounted in the plant control room, the plant operator has full control instead of letting the driver choose the tank to fill.

“The plant operator labels each tank with fill material and each tank is numbered. The driver would reference those labels when selecting which tank to fill. He will then choose the corresponding number on the control panel in an automated system, or he would open the corresponding valve manually.”

Hotmix Parts and Service offers the Advanced Tank Farm Management System to help monitor overflow, control where material is directed and control where material is diverted from the piping and metering system.

“From inside the operator’s station, the worker can select the tank he wants to go to,” Loesch explained. “The programmed logic will close other valves and remotely open the correct valve. The station can be at the unloading pump station and at the plant operator’s station.”

The Heatec team also shared some ways to guard against cross contamination from back flow.

“In a manual system, the driver or plant operator has to manually open the valve to the tank they want to fill. One major concern is to make sure that more than one valve is not open. They could possibly be adding AC from the truck to more than one tank, or you could get back flow and cross contamination. Also, it is important that the valves are opened and closed in the proper order. If the valve is not open for the tank that the driver or operator wants to fill, they should close the

Implement a Process for Success

For many asphalt producers, one way to prevent cross-contamination has been to label tanks at the farm, as Lubbers suggested above.

Loesch outlined another idea for producers that includes having at least one AC tank for each of the grades of asphalt you intend to run.

With agencies now requiring warm-mix additives, other conditioners, anti-strips, rejuvenators, etc., Loesch warned this practice could become complex.

“Some of these [additives] are put in at the terminal; therefore, it would not be uncommon to need five, six or more separate AC tanks,” Loesch said. “There’s no question there has been an evolution of more plants, particularly those in urban areas, having multiple AC tanks, multiple grades and sometimes even duplicate or backup tanks.

“Many innovative producers are blending their own PMA grades at the plant site,” he continued. “This allows the plant to have on-demand PMA grade, to only produce what is needed, and to buy fewer tanks, valving and piping.”

The System Affects Safety More than test results are at stake when it comes to monitoring material delivery and storage at the tank farm. Loesch shared the story of a producer, who will remain anonymous, erecting a new vertical storage tank. The workers assembled a great deal of the tank walkways, and went home at the end of their shift.

That night, someone put cutback asphalt in the unfinished tank. The next morning, when personnel returned to complete work on the tank, the laborer standing on top of the tank struck the arc on the welding torch. His resulting injuries from the explosion landed him in the hospital for an extended stay. “Each operation needs a rigid and failsafe system for allowing tanks to be filled,” Loesch said.

www.THeAsphaltpro.com // 21

mix it up

Preventing residual material or cross-contamination begins with the driver loading the correct material into an empty, clean tanker at the asphalt terminal. Photo courtesy CEI Equipment, Albuquerque, New Mexico. valve to the tank they don’t want to fill first, and then open the valve to the tank they want to fill second. This prevents back flow from one tank to the other. If both are open, even for a short period of time, like the time it takes to walk from one valve to the other, you could have a lot back flow from one tank to the other causing contamination. One valve should always be open to prevent trapping as mentioned in the sidebar.”

Another way to limit mistakes is to limit tanks and increase mixing technology and expertise.

“A very creative alternative is to store in one place the most used product in one or two AC tanks, and then do the polymerized, latex, rubber, liquid additives, anti-strips and others right at the plant,” Loesch said. “In this manner, not only are you creating exactly the product mix design at the plant that’s right for the given mix, but you’re dynamically blending it and mixing it right before the injection and mixing with the solid aggregate, RAP and other ingredients.”

In the event a driver has a contaminated load or puts material in a wrong tank, despite clear labeling, the producer has a few options to prevent failing DOT or other agency testing.

“If you only have two AC tanks, you have to make costly decisions about how to use expensive AC material just to get your tank drained,” Loesch said. He listed three options: 1. Use it up on non-spec jobs 2. Waste it 3. Put it in a portable AC storage tank Draining a tank requires caution, of course.

“With a vertical tank, even if the company drains the existing AC down in the tank so that it’s just above the coils, there’s still anywhere from 5 to 10 percent of the original AC in the tank,” Loesch said. “Even if they put the new grade of AC in the tank, there will be contamination in the blending. There will be a whole range of grades of AC by mixing the two together. If the producer has horizontal tanks, it’s even more dramatic because, in most tanks, if you drain the existing AC down to the level right above the coils, you could have as much as 20 percent of the original grade of AC still in the tank.

“The only proper way to have a new AC in the tank is to drain the original AC below the coils in the tank and, perhaps, even pump out the remaining AC below the coils.”

Of course, the catch is the heating coils.

22 // September 2017

“You should never operate the hot circulating oil in the pipes unless they are covered with AC, so all of this work would need to be accomplished in a rapid manner to drain the AC below the coils and get the tank cleaned out. Also, you will need a lot of piping and some extra transport vessels to store and keep the material hot so as not to waste the valuable AC that’s below the coils of the existing tank.”

Keep in mind, a miniscule level of cross contamination may be inescapable, yet may be undetectable. The team from Heatec shared: “Another note is that the only way to prevent cross contamination completely is to have dedicated lines for each tank. Otherwise you are going to have some leftover liquid left in the lines when switching tanks. But that’s expensive and really unnecessary. The amount of liquid left in the fill lines is minimal and wouldn’t change the class of the product.”

– By Sandy Lender

Don’t Trap Hot Asphalt When delivering liquid asphalt cement (AC) or polymermodified AC (PMA) to the tank farm, truck drivers and plant operators should work in concert to ensure asphalt valves aren’t shut off in a way that traps hot asphalt in the system.

Heatec, an Astec Industries Company of Chattanooga, spelled it out: “Do not shut off asphalt valves that can trap asphalt in strainers and asphalt piping heated by hot oil jackets.

Otherwise, heat may cause trapped asphalt to expand and suddenly rupture components in its piping, especially strainers.”

The result is a rupture that sends 300-degree asphalt spraying into the area.

Heatec listed the two piping systems in which asphalt is most likely to be trapped: 1. the asphalt fill system and 2. the asphalt supply/return system.

“Always keep at least one valve open in each of these two systems. When the valves are open, asphalt can expand freely into a storage tank.”

Source: Heatec Tec-Note Publication No. 1-04-111

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keep it up

How to Roll for Bonus Part 1—New Ideas in Roller Maintenance

Did you notice the darkness inside the wheels of this older model roller? Ball said, if you see this starting on one of your machines, it probably means the seals for the eccentrics have blown. It could seize at any time. Ball suggested this machine be taken to the shop before the team needs it on a job. It’s not a reliable backup roller if it could stop providing vibration at any moment. Photo courtesy John Ball, Top Quality Paving & Training, Manchester, New Hampshire.

If the screed leaves a line in the mat, the roller operator is called on to smooth it out. Mat imperfections, divots, cool spots, anything that isn’t perfect gets left to the breakdown, intermediate and finish rollers to take care of. That means the compaction equipment must be in perfect working order, so the first half of this two-part series for bonus-worthy compaction practices includes a close-up view of the equipment. Here are some updated ideas—as well as some tried and true maintenance tips—for keeping the roller in good condition for every shift.

Let’s start with a new trend that original equipment manufacturers (OEMs) have embraced for you. Fewer mechanics are entering the work force each year.

During the CONEXPO-CON/AGG tradeshow in March, Preston Ingalls, the president and CEO of TBR Strategies, took the stage as part of the CASE Construction Equipment “What’s Now” Speaker Series to share ideas for developing a proxy mechanic system to leverage the employees you already have on hand. He shared information with the audience that paints a grim picture of worker shortfalls—as it relates to trucking and construction technicians— over the next five years.

“There’s less emphasis on pursuing a blue collar or trades job,” Ingalls said. “So with the shortfall of programs to attract people, or even prepare or train them, and not a lot of interest from the fam-

ilies to pursue that, we’ve got a reduced pipeline on the front end.

That has a significant impact that’s only going to get worse.

“According to the Bureau of Labor Statistics, the construction and trucking industry will need to recruit 67,000 new technicians by 2022 just to meet the demand and replace retiring baby boomers.

My generation….This number does not include the 75,000 new diesel engine specialists that the Bureau anticipates will be needed by then just for growth reasons.”

What Ingalls showed was the vocation programs we still have in the United States graduate a little more than 10,000 aspiring technicians each year, which is far short of the 67,000 plus 75,000 we will soon need.

OEMs have responded by designing machines that require less routine maintenance, and by creating technologically advanced vehicles and systems that let operators and fleet managers know when they require attention. OEMs such as BOMAG, CASE, Caterpillar, Dynapac, Hamm, Topcon, Volvo and more offer telematics software that alerts the operator or owner or dealer—or a combination thereof—when routine and surprise roller maintenance is coming up. Predictive maintenance is now a buzzword.

I

24 // September 2017

The team at Volvo Construction Equipment offers ActiveCare Direct on a number of its compactors, as well as other machines. The OEM has made ActiveCare Direct available free for one year on new purchases of a wide range of Volvo Construction Equipment models. Here’s how it works: As this diagram shows, the software first monitors the machine. When there’s a need for repair or routine maintenance, the software alerts the Volvo Uptime Center, which is able to contact the appropriate dealership. That dealer then can communicate with the contractor, letting him know of pending problems before they occur or alerting him to scheduled maintenance items. Image courtesy Volvo Construction Equipment.

Contractors can respond, Ingalls pointed out, by using a proxy tech. He defined a proxy tech as the equipment operator who also has responsibilities for performing certain maintenance or repair tasks.

For many contractors, that’s been standard operating procedure since Day One. The roller operator performs a pre-shift cleaning and inspection of the asphalt compactor, greasing the grease points and cleaning the water system filters and spray nozzles. But Ingalls took that routine maintenance concept a step further.

“Instead of waiting for the mechanic to arrive, we’re actually going to do something a little more creative,” Ingalls told the CONEXPO-CON/AGG audience. He shared how to create a proxy tech program by first developing: • the tasks and boundaries each operator/proxy tech will be responsible for and limited to; • the skills and knowledge the proxy tech will require for his tasks; • the process to train and elevate proxy techs; • a screening and selection process to get the right talent; • a tools/parts storehouse of appropriate resources; • the appropriate parts to carry—the “uptime kit”; • a means to evaluate how the proxy tech program is going; • a way to “capture” what work has been performed; • key performance indicators (KPIs) with baselines to prove the program’s value; and • compensation packages/bonuses for proxy techs.

When Ingalls listed examples of tasks proxy techs can be trained to do, the list for roller operators looked familiar. The items we tell roller operators to check each day are already on his list (See “Daily Checks for Asphalt Rollers” on page 30). The same was true for pavers and milling machines, by the way. Asphalt professionals are already leaning toward the use of operators as proxy techs. When you ask the roller operator to replace a bent scraper bar and worn out cocoa mats, you’re getting work done without calling on a mechanic who may be dispatched to another site at that moment. The operator who knows how to clear a plugged spray nozzle saves the company time and money.

“Checking the scraper and sprinkler system is the step always missed by most operators,” Tim Hoffman, product manager for Dynapac Compaction Equipment, said. “But it is one of the most important things to remember. Having all the nozzles spraying and the scrapers adjusted correctly will ensure that the drum stays wet and will keep asphalt from sticking to the drum.”

Here are some tasks the valuable roller operator needs to take care of.

He shared that you will grease the nipple fitting on the top of the articulating joint at least once a week, if your machine has one. Don’t over-grease it, he cautioned, or you’ll have an area that attracts and pulls dirt and sand into the bearing. In fact, beware of over-greasing any points on older rollers for that reason.

Stop Mold Growth

“The water system is probably the most neglected maintenance item, yet the simplest thing to take care of,” Tim Kowalski said.

He’s the applications support manager for Hamm, a Wirtgen Group Company, Nashville, Tennessee. He and Ball outlined the threepart filtering that water systems use to help operators keep sand, dirt or other impurities from mucking up the all-important spray nozzles. They also discussed how to maintain these areas.

1. The first stop-gap measure is a sock-like filter in the filling tube, through which the water is pumped when you fill the tank. Kowalski warned that sometimes operators will want to remove this filter because it restricts flow. He advised against that. Saving a few minutes while you fill the tanks is not worth the hassle of extra cleaning and possible downtime due to big clogs later. Take the time to do things right and let the first filter do its job.

2. Next, there’s a canister filter in the bottom of the tank, or on the side of the machine, which Kowalski referred to as the main filter for the system.

3. Finally, there are micron filters on the spray tips. If water sits here too long, Kowalski said, it gets gummy or slimy. Keep these tips clean and clear by keeping the filters clean and clear. Ball recommended the operator remove the tips from the spray bar. Then make up a bottle of soapy water with a drop or two of Dawn dishwashing liquid. Dip a toothbrush into this solution to clean the filters. Run clear water over them and replace them for work.

When the tips themselves need cleaning, use a welding tip cleaner to get into the crevices.

To Grease or Not to Grease

Newer models of compaction equipment offer fewer routine maintenance points than older models when it comes to greasing (See “Maintenance-Free Benefits” on page 28). In the real world, contractors have older machines on the job still putting in hour after hour of reliable service. Those old workhorses have maintenance needs, and if they include an articulating joint, there’s at least one point where greasing requires some caution.

John Ball of Top Quality Paving & Training, Manchester, New Hampshire, spent eight years as a roller operator for Pike Industries before he became the company’s director of training for 10 years.

Clean the 10-micron screen filters in the spray nozzles with a toothbrush.

Even the tanks need cleaning. Kowalski reminded readers that the connecting tube between the tanks can clog as well. It seems logical when you look at it on paper, but when you’re in the field, the hustle and bustle of production can make an operator forget the simplest of tasks. For example, “If you have more than one pump on a roller, make sure you turn both on,” Kowalski said.

www.THeAsphaltpro.com // 25

keep it up

The spring puts tension on the scraper bar, holding it against the steel drum. If the spring has lost its tension, you will need to replace it. Keep a box of springs in the mechanic’s shop at headquarters.

This tandem roller from BOMAG Americas features a sealed bearing that does not require greasing. Photo courtesy BOMAG Americas Inc., Ridgeway, South Carolina.

Both Ball and Kowalski wanted readers to think about water sources. “Water from fire hydrants has rust in it,” Kowalski said.

“Water from ponds has algae that clogs up hoses.” They recommended the best way to keep rust or algae from doing its worst damage is to drain the tanks and clean them out.

“If the roller’s going to be sitting for a while, drain it,” Kowalski said. “Especially in cold weather, treat the water with anti-freeze and drain it at the end of the shift.”

For cold weather, once the tanks are empty, Ball reminded operators to undo the hose, suck the anti-freeze up through the nozzles through the tips and into the lines.

For regular maintenance: “Treat the water with chlorine about once a month, just like you would clean your swimming pool, and drain that out,” Ball said. “For some of the sticky mixes we have to compact, pour a bottle a Dawn in the full water tank to help lubricate the drum.”

Experts advised operators use caution when selecting cleaning supplies.

“Chemicals in the tank often cause problems with the seals in the water pumps,” Dynapac’s Hoffman warned. He advised operators “check to make sure that anything put in the tank is safe for any kind of water pump.”

“The plastics used for the tanks are pretty chemical-resistant,” Kowalski said. “But you don’t want to use a petroleum-based product.”

Scrape It

The next area that experts agreed was vital for proper roller operation was the scraper system, and they agreed that operators need to pay more attention to the scrapers. Let’s start with the springs holding the scrapers against the drum. A savvy roller operator will have in his uptime kit a can of WD40 to lubricate the springs—or shock absorbers—at any point during the shift.

An older roller may have a point to be greased on its articulating joint.

Grease the nipple fitting on the top once a week. Notice in this picture that the seal has leaked hydraulic oil. This attracts dirt and pulls it into the joint. This is a maintenance item to take care of so the older model backup roller doesn’t fail the team. Photo courtesy John Ball, Top Quality Paving & Training, Manchester, New Hampshire.

26 // September 2017

The roller operator’s uptime kit should contain: • Phillips screwdriver • flat head screwdriver • pliers • toothbrush

• a welding tip cleaner • Dawn dishwashing liquid • vice grip • putty knife • temperature gun • WD40

keep it up “You want the scrapers to move freely on and off the drum,” Kowalski said. This is vital when moving a dry drum. When it’s time to take the roller from one part of the job to another, you won’t run in vibratory mode and you’ll turn off the water system. At this time, why would you hold the scraper against a dry drum? To lift the scraper off the drum, you need enough play in the spring to release some of the tension or pressure.

Of course, the spring’s function is to put tension on the scraper bar.

Ball warned readers that if it loosens, it won’t hold the bar in place. If the spring should fail, it must be addressed. “Either get a new one or tighten it,” Ball said. “If it’s too far sprung, just replace it. Keep a box of springs or small shock absorbers in the mechanic’s shed.”

For operation, the four scrapers work as a team. “When we’re rolling in one direction, two of the scrapers work as a water trough to put a thin film of water across the face of the drum,” Kowalski said. “The other two are keeping material off the drum. When we change direction, the scrapers change jobs.”

If a scraper is bent, it obviously can’t do its job. Ball spelled it out: “If the scraper bar is bent out of shape, the rubber part won’t be touching the steel drum, so it won’t be troughing the water anymore.

You’ll run out of water.”

The rubber on the scraper bar is a wear item, so the operator will want to adjust it once a month, whether there’s a problem with the metal bar or not. To solve the problem of a bent scraper bar or worn rubber, follow these steps from Ball.

1. Take out the holding pins.

2. Take the scraper bar off the roller.

3. Remove the rubber from the bar.

4. Heat up the metal.

5. Straighten the metal, if possible. If the metal cannot be unbent, replace it with a new scraper bar.

6. Replace the rubber, if necessary.

7. Reverse the steps to put the scraper bar assembly back in place.

Not all roller manufacturers install cocoa mats these days, but you can add them, and there are variations of the mats still in use in the field. They work in a similar fashion to the scraper bar, helping to lubricate the drum with water they absorb and distribute, and to scrape material from the drum’s surface.

Daily Checks for Asphalt Rollers

In these three pictures from John Ball of Top Quality Paving & Training, you can see the filter from the bottom of the tank fits inside a canister.

Ball explained that you’ll first drain the tank, and then remove the filter. Take the filter out of the canister. In the middle photo, you can see fungus inside the filter, growing on the screens. Use a toothbrush dipped in a chlorine-and-water solution to scrub away fungus and other particulates. Run clear water over the screens to ensure they’re clean before reassembling the filter. Double-check the O-ring you see in the third photo before putting everything back together. If the O-ring is damaged, the tank water will not pump through the filter properly.

28 // September 2017

1. Check the engine oil level 2. Check the engine coolant level 3. Check the hydraulic reservoir level 4. Check lights and wire connections 5. Refuel 6. Fill water tanks 7. Check the sprinkler system 8. Check the emergency watering 9. Check the scraper setting 10. Drain the fuel prefilter 11. Check hoses and connections are tight Source: Dynapac North America

keep it up

Maintenance-Free Benefits Not long ago, tandem vibratory rollers, along with many other machines found at the jobsite, had a number of grease fittings that required maintenance. On a daily or weekly basis, a service tech had to apply grease to a zerk at every hinge point on the roller, so they wouldn’t corrode or seize.

When you tally up a roller’s hinge points—articulation joint, access panels, engine hood, idler bearings, etc.—it took time to grease all of the areas. “At BOMAG,” said Bert Erdmann, product manager, heavy compaction for BOMAG Americas Inc., Ridgeway, South Carolina, “we use a slogan for training sales, service techs and dealer representatives: ‘The easiest maintenance is one that never occurs.’”

When it comes to maintenance free bearings, it’s not only about saving time but also about increasing component longevity. If a tech doesn’t grease enough, the hinge-points could seize or allow water infiltration, resulting in corrosion. Too much grease allows the excess to collect around the hinge and attract dirt to the hinge points.

Source: BOMAG Americas Inc., Ridgeway, South Carolina

The broken scraper bar no longer spreads water efficiently. It will cause you to lose water in a hurry, which means you’re spending time at the water truck and not on the mat. The good scraper bar rests the rubber portion against the steel.

This scraper bar is completely worn out. Consider using a material such as neoprene synthetic rubber for the rubber portion to get good wear life. Photo courtesy John Ball, Top Quality Paving & Training, Manchester, New Hampshire.

One type of roller that uses a cocoa mat is the pneumatic tire roller, and it has an important maintenance routine to remember.

Think about the original material of a rubber tire and the original material in the asphalt mix—petroleum.

30 // September 2017

“At the end of the shift, when the tires are hot and the fibers of the cocoa mat have hot, sticky material embedded in them, lift the mat up off the tires before turning off the machine for the night,” Ball warned. “Do not leave the cocoa mats resting against the rubber tires while they cool off. The next morning, you will have a congealed mess to separate before you can work.”

Avoid Complacency

The system AsphaltPro would like to draw attention to before we complete this installment of the “roll for bonus” series is the lights.

Of course lighting is vital for nighttime paving, but even daytime projects benefit from strobe and beacon lights that catch the eye of the motorist speeding past your work zone. Ensure the lights on your drum edges, on the top of the canopy/ROPS, on the back and front of the machine, etc., are functioning properly. If a bulb is out, replace it before it’s a crisis.

Kowalski said, “Check these before you get out on the job.” He’s absolutely right. Once the rest of the paving and compaction train is half a mile up the road is no time to realize the finish roller has no strobe light to alert motorists to his presence.

While there are many routine maintenance points that roller operators instinctively know to check, such as the surface of the drums and the level indicators for all fluids, there are other areas that can slip a person’s mind when racing production. With the use of telematics and predictive maintenance systems, it’s easier to let the machine tell us what’s going on. Don’t let technology lull you into a state of complacency. Instead, put technology to work to get all the maintenance points checked each day. Use technology as one more tool in the uptime kit.

Next month, we’ll take the well-maintained roller into the field for best practices for bonus-worthy compaction.

– By Sandy Lender

Retrofit Controls

A Heart Transplant for Your Plant

The control system: it’s the heart of your plant, reaching every aspect of your operation.

ASTEC Retrofit Controls expand and improve your capabilities with an all new control system customized to fit your needs. It’s like a heart

‘‘

Pictured from left to right Roy Bryant, Plant Foreman Ricky Pendergrass, General Superintendent Bailey Watkins, Asphalt Plant Manager

When our outdated controls started to give us problems, we knew it was time to upgrade.

We chose Astec because of the service.

Astec has the absolute best service.

your Includes an updated A Stransplant T E C , for IN C .plant. an Astec Industries Company 4101Control JEROME Center, AVENUE Power • CHATTANOOGA, TN 37407 USA • 423.867.4210 • FAX 423.867.4636 • astecinc.com Center and all new The new system communicates timing and electrical switch gear.

tolerances when switching mixes extremely well. Now we know when the mix is in tolerance; therefore, we waste less asphalt.

— Bailey Watkins Asphalt Plant Manager, Fred Smith Company

ASTEC, INC.

’’

an Astec Industries Company 4101 JEROME AVENUE • CHATTANOOGA, TN 37407 USA • 423.867.4210 • FAX 423.867.4636 • astecinc.com

project management

Add Consulting to Your Project Management Property and facility/site managers are faced with the dilemma of trying to evaluate pavements themselves or hiring a consultant when it comes to caring for their asphalt parking lots. Have you considered acting as a consultant or advisor as part of your customer service offerings on commercial and private jobs?

Not all property managers are familiar with their counties’ rules, regulations and standards for pavements, Americans with Disabilities Act (ADA) requirements, construction permits required for different processes, etc. Fewer know the wide variety of paving and pavement maintenance options available from our industry. As a member of the asphalt industry, you must be more than one of the bidders for a project. Oftentimes, you also function as the consultant to the customer.

Here’s the given: A property manager needs to maintain or improve his parking lots for the comfort and use of his tenants. His board of directors requires bids from at least three contractors, but those contractors bid on the job without any plans or specifications.

This process typically results in the bidders having different interpretations of the scope of work. The submitted bids end up having very different quantities and costs, making it difficult for a manager to determine which bid will give the desired results.

As part of your services, you can manage a property’s project in these ways: 1. Visit the property and evaluate the existing pavement deficiencies to determine the appropriate repair.

2. Determine if the pavement needs to have a surface treatment applied or the lot repaved.

3. Help the manager to prepare a clearly defined scope of work that balances the options for improvements within the available funding.

4. Discuss construction phasing of the project to minimize the effect on the occupants of the facility. You may wish to provide a copy of the work schedule to help with phasing.

5. Inform the manager of the required permits, and provide help and guidance for obtaining them.

6. If you are functioning as a consultant only, you may be able to review the bids for compliance to the plans and specifications. Become familiar with the liabilities you take on when acting as a consultant and purchase the appropriate insurance to protect your business.

7. Stay in communication with the property manager or owner during the construction to see that the work is in general conformance with the plans and specifications, and to the manager’s expectations.

These steps require work and communication. Your estimator, salesperson and project superintendent will work together and will be key to your success. Remember that property managers often have responsibility for multiple properties, whereas site managers

P

32 // September 2017

tend to one property. If you build a good working relationship with a property management firm and the managers within the firm, you will reap the benefits in the long run. Your knowledge, skill, customer service, assistance with permits, and willingness to make the project go smoothly may be what tips the scale in your favor even if your bid is a couple hundred dollars higher than a competitor’s.

Property managers who are unfamiliar with the requirements of the design and construction process, will consider hiring a consultant for help. A member of the Hawaii Asphalt Paving Industry (HAPI) shared his view on this with me: “The property management company should hire a consultant familiar with pavement maintenance and let that person be responsible for upkeep of paved areas for each individual property….That person should also be responsible for creating a budget for future pavement maintenance requirements for each property because it always seems that the owners don’t realize the cost involved for proper maintenance.”

Remember that different management companies will work differently, requiring different levels of responsibility from their property and site managers, thus of any consultant they may hire.

As a member of the asphalt industry, you are in the position to be an expert resource for them, and to provide the professional services they need.

– By Jon Young

Jon Young is the executive director of HAPI. His previous work experience includes being a senior project manager at Belt Collins Hawaii, an engineering design consulting firm, and a site design and construction manager at Gentry Homes Ltd., a major land development company in Hawaii.

Miles Ahead of the Competition WHILE OTHERS ARE STILL GETTING STARTED, EVOTHERM® HAS CROSSED THE FINISH LINE

Whether you add Evotherm at the plant or get it from an asphalt supplier, no other warm mix is easier to start using. Over the past 12 years, customers have used our technology to pave around the world more than 10 times. That’s tried and true expertise on thousands of projects in all 50 states and over 25 countries. It’s never too late to join the race with the first WMA developed in the USA. Choose Evotherm and we’ll put you miles ahead of the competition. Contact evotherm@ingevity.com today.

WARM MIX ASPHALT TECHNOLOGY

That’s a Good Idea

Save on Costs with Your Professional Guide to Asphalt Mix Delivery Part 6—Put the Canopy on Rails For the 2017 paving season, we dive into an essential area of project management for asphalt professionals: safe and timely delivery of hot-mix or warm-mix asphalt (HMA/WMA) to the paving site. During this eight-part series, you’re getting some backto-basics best practices to share with veteran and new haul truck drivers, in addition to new tips, ideas, and case studies with logistics and technology that will enhance your bottom line. Producers have streamlined processes at the plant; contractors have nailed down best practices in the work zone. Now it’s time to harness the potential you’ve been missing when it comes to mix delivery and haul truck fleet management.

This sixth installment looks at one idea to keep the tarp in good repair and help control mix temperature during hauling. When you exit the loadout area at the asphalt plant, you will want to immediately cover the new load of material to hold heat. Independent driver Steve Murray of Steve Murray Trucking in Hooksett, New Hampshire, shared the good idea he uses to make this process quick, easy and safe.

As you can see in the pictures on these pages, the tarp system Murray uses is one on rails that holds the tarp close to the truck body. When the canopy is closed, it almost “seals” the truck bed closed, forming a sort of “container” that holds the perishable mix and its heat inside.

By using a canopy that’s on rails, Murray has eliminated the flapping and tearing of tarps that hang above the mix, and has eliminated the passage of air or wind that gets in under the tarp. That wind cools the top of the mound(s) of material, creating a shell of hardened mix. A shell of cooler material represents temperature segregation for the paving crew to deal with; it can also represent chunks of material segregation.

While several tarping systems now feature remote functions that let the driver move the tarp to cover and uncover the load without leaving the safety of the cab, Murray prefers the Slide-n-Go cover system from Cramaro of Stuart, Florida, because it doesn’t have tall arms that could get tangled in overhead tree branches, wires or street lights in the work zone. The Cramaro Slide-n-Go cover system is retracted in increments and closed with the push of a button from inside Murray’s cab.

Keep in mind, if you do exit the cab to manipulate a tarp, you must wear your personal protective equipment. Make sure the safety vest is clean and bright. Wear a hard hat to protect yourself in the event of an emergency. If you have safety gators, make sure you wear them to give yourself that extra flash of safety yellow that will alert everyone to that fact that you’re out of the truck. If you have a tarp that requires manual manipulation, stay aware of your surroundings at all times and don’t dilly-dally.

You’re not on a break. You’re getting the tarp in place, or out of the way for dumping, and then getting yourself back to the safety of the cab.

F

– By Sandy Lender

34 // September 2017

TOP: Steve Murray of Steve Murray Trucking, Hooksett, New Hampshire, uses a Slide-n-Go cover system from Cramaro out of Stuart, Florida. MIDDLE: You don’t need tie-downs with this system. BOTTOM: Also notice the height of the body is marked directly on the vehicle, and Murray has an LED at the top of the body. As the body rises to let mix charge the hopper, the light also rises. The light goes up with that corner of the body, making it apparent to everyone where the edge of the truck body is at all times. All photos courtesy John Ball, Top Quality Paving & Training, Manchester, New Hampshire.

R18 Certifies Higher Calibration Costs

By Sandy Lender

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Typically, standards voted on within the International Organization for Standardization (ISO) don’t impact the asphalt industry directly, according to Ray Brown, Ph.D., director emeritus at the National Center for Asphalt Technology (NCAT) at Auburn University. This truism has changed to some extent with the adoption of ISO 17025 calibration of measurement standards by the American Association of State and Highway Transportation Officials in 2016, which AASHTO began enforcing in April of this year. Members of the asphalt industry helped us understand how the changes may affect a lab near you.

“There are a number of organizations that can provide accreditation for laboratories,” Brown shared. “These include AASHTO, ISO, Corps of Engineers and… many more. In the United States, by far, the most common organization for accreditation for asphalt pavement testing is AASHTO through the AASHTO Accreditation Program (AAP) for materials testing laboratories. All state DOTs, contractors and commercial labs use this organization for accreditation.”

In 2016, AASHTO R18 adopted the ISO 17025 calibration of measurement standards. This change required measurement standards to be calibrated by an ISO 17025-certified laboratory unless the calibration was completed by the manufacturer of the measurement standard.

Enforcement of this requirement began April 13, 2017.

In 2017 AASHTO R18 removed the exception that allowed for manufacturers to calibrate their products without being ISO 17025-certified and replaced it with an exemption for proprietary measurement standards only. These requirements will be enforced starting Jan. 1, 2018.

The stringent parameters of the measurement standard are intended to create an error-free testing environment for labs. Todd M. Arnold, Ph.D., the general manager of Pine Test Equipment, Grove City, Pennsylvania, wrote: “The purpose of this requirement is to build confidence

36 // September 2017

If the item is to be used for an official calibration at an AASHTO-accredited lab, the Pine proving ring calibrated on or after Jan. 1, 2018 must be calibrated by an ISO 17025-certified lab for calibrating force applicable force measurement devices. Pine field technicians will carry devices that comply with AASHTO R18. into test results because test results are used to make important and potentially costly decisions.”

Bob Lutz, the manager of the AASHTO Materials Reference Laboratory (AMRL), provided insight into the AAP, including the quality management system.

“The quality management system review includes reviewing the lab’s documented policies, procedures and records.

Your quality management system must meet the requirements of AASHTO R-18, which is for sale for $55 at the online AASHTO bookstore.”

Let’s use Pine Test Equipment and a fictional ABC Asphalt Company, as an example to explain what’s happening. When ABC Asphalt orders a new gyratory compactor, it is calibrated and certified for use at Pine’s factory prior to shipping. When it is delivered to ABC Asphalt’s accredit-

ed lab, the technician sets it up in the exact place where it will be operated, and calls the local certifying technician to calibrate it again. ABC Asphalt pays a fee for the local technician to use certified calibration tools to calibrate the gyratory compactor again.

Depending on which gyratory compactor the company has purchased, those tools include a subset of the following: • AFGCLR05C: 5,000-pound Proving Ring (AFGC125X, AFG1 and AFG2 force) • AFG123: “1-2-3” Height Blocks (AFGC125X, AFG1 and AFG2 height) • AFGBA04: Height Tube (AFGB1 height) • AFGBA06: Load Cell and Meter (AFGB1 pressure) • AFLS1 “RAM” with AFLSC01 Calibration Tube: (internal angle on all machines) Dave Savage of Pine Test Equipment stated clearly, “If you want to have an accredited lab, your devices have to be calibrated.” He pointed out, now that AASHTO has incorporated ISO 17025, several calibration tools have to be certified by a testing service that meets the requirement. “It’s a much more stringent standard,” he stated.

AsphaltPro posed some questions to Arnold to help lab managers wade through the upcoming change.

AsphaltPro: Which equipment will be directly affected by the updated AASHTO R18 requirement?

Todd Arnold: The AASHTO R18 changes mean the AFGCLR05C Proving Ring, the AFG123 Height Blocks, the AFGBA04 Height Tube, and the AFGBA06 Load Cell and Meter, must be calibrated by an ISO/IEC 17025-certified laboratory if they are used to calibrate and issue a certificate of calibration for a gyratory compactor in a laboratory seeking AASHTO accreditation. An AFGBA06 calibrated on or after April 13, 2017, must comply with this requirement. The AFGCLR05C Proving Ring, the AFG123 Height Blocks, and the AFGBA04 Height Tube calibrated on or after January 1, 2018, must comply with this requirement.

AsphaltPro: Will Pine Test Equipment personnel be qualified to calibrate equipment for customers after January 2018?

Todd Arnold: The AASHTO R18 adoption of the ISO 17025 requirement requires that the measurement standards, except for the RAM, carried and used by Pine’s field service technicians must be calibrated by an ISO 17025-certified laboratory for our calibration work to meet AASHTO R18 requirements. We will comply with R18.

AsphaltPro: For a lab that wishes to retain its AASHTO accreditation, what is the best way for the lab manager to find a qualified calibration technician?

Todd Arnold: If one is looking for someone to calibrate a Pine gyro, I am going to tell you that Pine technicians are the best in the business. Our technicians service Pine equipment.

Generally speaking, to meet the new requirements, a technician needs to have measurement standards that are calibrated by an ISO 17025-certified laboratory. A lab manager can determine this by looking at the calibration certificate for the measure-

ment standards. An ISO 17025-certified calibration will indicate it clearly on the certificate. The lab manager can also review the scope document of the lab to ensure it is certified to conduct the calibration work done on the certificate.

The Pine load cell & meter system must be ISO 17025-calibrated if its calibration certificate is dated on or after April 13, 2017, if the system is used to conduct an official calibration and if AASHTO accreditation matters to the owner of the gyratory compactor.

The Pine proving ring, height blocks and height tube must be ISO 17025-calibrated if their calibration certificate date is on or after Jan. 1, 2018, if the items are used to conduct an official calibration, and if AASHTO accreditation matters to the owner of the gyratory compactor.

Not all labs seek accreditation, but those that have implemented and maintained stringent quality control measures have done so to reap a number of financial and industry enhancing benefits. If a lab should elect to calibrate equipment with non-ISO

17025-certified measurement tools going forward, the lab flirts with the loss of accreditation and the benefits thereof. Arnold reminded readers that the process of maintaining accreditation begins with an accreditation auditor writing a report on noncompliance.

Lutz provided a breakdown of the onsite assessment for labs that have received accreditation through AASHTO’s AMRL. It shows that the assessment takes place approximately every 24 months. The assessor from AMRL labels any findings in his report as “nonconformities,” and the lab has 90 days from the issuance of the report to not only address the nonconformity, but to communicate its solution to AMRL. For something as simple as conforming to the updated R18, the lab must subcontract technicians who are ISO 17025-certified or who carry with them calibration tools that have been calibrated by such labs. While this may incur additional cost to bring a qualified field tech to your lab prior to spring 2018 startup, it’s a cost of doing quality business.

www.THeAsphaltpro.com // 37

Improved Efficiency INCREASED PRODUCTION V-Flights Shower Material Along the Edge of the Notch as Well as the Tip

V-flights Allow for a More Even Veil of Material

FOR MORE INFORMATION VISIT ASTECINC.COM/VPAC

V-PAC

S TA C K T E M P E R AT U R E C O N T R O L S Y S T E M V-Pac U.S. Patent No. 8,863,404 B1

To meet market demand, we change mix design often. The frequent changes push our plants to the limit. ASTEC suggested we add the V-Pac stack temperature control system. We started using the V-Pac system and, without a doubt, it has improved efficiency and increased our production capability.

Clarke DeHart,

Production Manager, CR Jackson Inc. Operating the V-Pac Stack Temperature Control System since 2011

How to Use the Delta Tc Parameter

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By Pamela Turner and Christine Hall

You may have heard of a new asphalt binder parameter for evaluating age-related cracking potential. Pronounced delta tea see, it’s spelled out ▲Tc. It’s defined as the numerical difference between the low continuous grade temperature determined from the Bending Beam Rheometer (BBR) stiffness criteria (which is the temperature at which stiffness, S, equals 300 MPa) and the low continuous grade temperature determined from the BBR m-value (which is the temperature at which m equals 0.300).

If you aren’t sure how to determine low temperature continuous grades, you can find instructions in ASTM D7643, Standard Practice for Determining the Continuous Grading Temperature and Continuous Grades for PG Graded Asphalt Binders. Don’t forget to subtract 10°C from your BBR test temperatures when determining low temperature continuous grades.

For example, let’s say a set of BBR tests yielded the following results at two test temperatures: -18°C : Stiffness = 243 MPa and m-value = 0.309 -24°C : Stiffness = 400 MPa and m-value = 0.256 Using these results, the low continuous grade temperature for the stiffness criteria (Tcont, S) equals -30.5°C, and the low continuous grade temperature for the m-value criteria (Tcont, m) equals

40 // September 2017

-29.0°C. Once you have the temperatures, subtract Tcont, m from Tcont, S to get the value of ▲Tc. For this example: ▲Tc = -30.5 (-29.0) = -1.5.

It’s that simple. The ▲Tc parameter can be measured on any asphalt binder, whether it’s a virgin asphalt binder or binder that’s been extracted and recovered from a sample of asphalt mix.

Put it to Work Now that you know what ▲Tc is and how it’s calculated, let’s discuss how it relates to asphalt pavement performance, and what it shows us that we can’t get from BBR stiffness and m-value results alone.

Asphalt Institute Engineer Mike Anderson first proposed ▲Tc in 2011 to measure the ductility loss of aged asphalt binder as part of a study examining relationships between asphalt binder properties and non-load related cracking. In particular, the study focused on finding a parameter to explain block cracking in airport pavements.

Block cracking is a non-load related cracking phenomenon similar to thermal cracking that causes cracks to develop in both longitudinal and transverse directions. This results in a square or “block” pattern. Block cracking is most often seen in significantly

aged pavements with low traffic volumes. The lack of traffic allows the asphalt binder to develop a type of internal structure (thixotropic hardening) that will exhibit brittle behavior when exposed to thermal stresses. Although it’s similar to thermal cracking, studies have shown that block cracking may be more dependent on the age of the asphalt pavement than on the environmental conditions. In other words, an older pavement that does not experience environmental conditions that would cause thermal cracking may still experience block cracking.

Ductility is defined as the ability of a material to be stretched without breaking. This is important in flexible pavements because the thin films of asphalt binder between the aggregate particles must have a certain amount of ductility to withstand stresses in the pavement due to traffic or temperature changes. Prior to the Superpave Performance Grading (PG) system, ductility was used as a surrogate relaxation parameter for asphalt binders and was considered a way to distinguish cracking performance. In general, research has shown that ductility may be an important factor in cracking performance as asphalt pavements age. In particular, pavements with low ductility binders tend to exhibit poor cracking performance, even when the overall asphalt binder stiffness values is similar to that of pavements that perform well. These observations imply that asphalt binder stiffness and relaxation may not change at the same rate due to aging and that the loss in relaxation (ductility) may have a more significant effect on cracking performance than the increase in stiffness does.

Our current Superpave PG system does not include a direct measure of ductility. Instead, it relies on relaxation parameters such as the phase angle measured by the Dynamic Shear Rheometer (DSR) at intermediate temperatures and the BBR m-value at low temperatures to predict cracking performance. While these parameters are suitable for determining the relaxation properties needed for other types of cracking, they do not provide a relationship between stiffness and ductility that may be needed to control block cracking.

Other studies have shown that as some asphalt binders age, their low temperature relaxation properties, as measured by the BBR m-value, deteriorate significantly faster than their low temperature stiffness increases. This leads us back to the possible use of ▲Tc . There is currently not an official criteria for ▲Tc, but an unofficial minimum value of -5 has been proposed for asphalt binders extracted and recovered from mixes containing recycled asphalt shingles (RAS). Possible criteria for other binders are still being researched and evaluated.

In summary, the ▲Tc parameter has been proposed as a relatively simple method for measuring the loss of relaxation properties of asphalt binders. While still in the evaluation phase, it could potentially be used as an asphalt binder parameter for predicting cracking performance of asphalt mixtures. Potential applications may include evaluating binders from mixtures containing recycled materials and evaluating the effectiveness of rejuvenators, recycling agents, etc.

Reprinted with permission from the Spring 2017 NCAT Newsletter.

Definitions for Clarity

Block Cracking = a non-load related cracking phenomenon where the cracks develop in both longitudinal and transverse directions resulting in a square or “block” pattern; most often seen in significantly aged pavements with low traffic volumes Delta Tc parameter = a method for measuring the loss of relaxation properties of asphalt binders Ductility = the ability of a material to be stretched without breaking Thixotropic = a substance’s property of liquefying when shaken or stirred, and then returning to a hardened state when standing still

www.THeAsphaltpro.com // 41

Control Condensation in Asphalt Processing, Storage

By Amanda Williams

ClearSpan Sales Manager Geoff Ching stated, “When mechanical ventilation is required, our design experts meticulously calculate airexchanges to make certain airflow is maintained to prevent condensation.”

T

There are many options for both passive and mechanical ventilation to relieve operations of moisture damage challenges. Producers know that moisture slows down asphalt operations, adding cost to production. Asphalt producers can prevent condensation through a combination of efficient ventilation techniques. There are two basic types of ventilation that can be used alone or in combination, depending on individual buildings, to address issues of condensation.

Natural Ventilation

Passive ventilation, when done right, can require very little mechanical ventilation. Wind, buoyancy and air pressure aid in healthy air exchange rates. Passive cooling involves low-cost solutions to structural issues that allow the accumulation of condensation. Passive ventilation includes adding ridge vents and cupolas, which are two simple design details to consider before construction. To create a more efficient airflow exchange, optional end walls and side panels can completely eliminate condensation causing moisture.

Proper air flow in an asphalt storage structure is vital when facing moisture challenges. Not only does effective ventilation create a cleaner, more efficient process, employees benefit by avoiding inclement weather and a stagnant working environment.

Building orientation is a thoughtful and helpful method of optimizing building climate stability. Buildings should be oriented to allow cooling breezes in hot summer months and protection from unwanted winds in cold weather. Noting the prevailing wind patterns of your jobsite throughout the course of the year can help you decide which winds to take advantage of or inhibit. Try to use a Wind-rose diagram that will show statistics of wind speed and direction throughout the year in your location.

Keep in mind during this process, orienting a building by aligning its shorter axis with winds will create optimal wind ventilation. It follows that orienting a building perpendicular to prevailing winds

42 // September 2017

will allow the least amount of passive ventilation. Consider how the sun moves on individual sites and align the building so it is most suitable for air exchange and receiving sunlight.

Orientation of a building is an important thing to understand.

There are some basic details to keep in mind when using this strategy. When windows are placed on opposite sides of the building, natural ventilation will be about three times more effective than placing windows on only one side.

Nevertheless, effective cross-ventilation does not just come from perfect building orientation. Internal structural elements can easily be designed to channel airflow throughout the building. These are important design details that can create a major advantage once operations get under way. For example, window design and ventilation louver design affect natural cooling potential.

Mechanical Ventilation

Some buildings don’t provide sufficient passive ventilation, so mechanical methods are necessary. Fans, evaporative cooling systems, vents and basic duct systems effectively eliminate issues, like stagnant air, mold and excessive moisture. Generally, many businesses find that a combination of both passive and mechanical ventilation is the best way to achieve a moisture-free environment.

Being able to customize a building should be a key factor in the decision making process. Some fabric structure businesses offer dozens of ventilation solutions. Customized ridge vents, side panels and end walls allow customers to design an ideal structure for their business. When dealing with a professional design team, customers are provided with guidance on each project to keep water and condensation outside of the structure. Design experts can take customers step-by-step to help them create sufficient exterior drainage and custom ventilation systems that incorporate both passive and mechanical solutions. Moisture sensors, fans, exhaust systems, and mechanical vents are all easy mechanical additions to a structure, and will prove to be very helpful.

ClearSpan is one company that has decades of experience in fabric structure design. Sales Manager Geoff Ching said, “Structures with open ends and sides virtually guarantee an interior environment free of condensation. When structures must be fully enclosed, we consider passive ventilation options along ridges and end walls.”

The great benefit to choosing a company with experience is that they understand different industry applications, and how to create the most cost-effective design.

In asphalt operations, cost reductions are largely achieved by optimizing the drying cycle of materials. The two major benefits of reducing moisture in asphalt mix are lowered production costs and improved quality of the final product. Using the combination of passive and mechanical ventilation systems within a structure will help create a safer work environment and a cleaner, more profitable end product.

ASTEC Parts. We’re Here. Always.

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Innovation in the Asphalt Industry

Part 3—How to Get Federal Protection

By Brian Mack and Anna Quinn

Editor’s Note: The information contained in this article is provided for educational purposes only and does not constitute legal advice nor result in an attorney-client relationship with the reader. Any questions about how this information might affect your particular situation should be addressed to an attorney.

O

One of the most important steps to protecting your idea and business brand in the asphalt industry is to seek federal protection through the United States Patent & Trademark Office (USPTO). Failing to protect your idea with a patent opens the door to a competitor copying and reproducing your product. Receiving a patent or registering a trademark helps protect your idea and business’ branding, and may increase the value of your company. While a patent does not prevent someone from copying your product or service, it does give the patent holder the right to exclude others from making, copying, selling, offering to sell or importing the invention in the United States. Likewise, a federal trademark registration grants the registrant the right to prevent others from using the brand with the same or highly similar goods and services across the United States. It is important to note that the patent or trademark owner must choose to enforce the rights given to him by the USPTO. Below are some important steps to consider taking when trying to protect your intellectual property.

While it is possible for an inventor to try to protect his intellectual property on his own, due to the complexities of the U.S. patent and trademark systems, most inventors use the services of a licensed attorney. For obtaining patent rights, the inventor will seek out a registered patent attorney. A roster of registered patent attorneys can be found on the patent office website (www.uspto.gov). Just as a doctor has a specialty, typically patent attorneys do as well. Patent attorneys have a technical background, often in a specific area of science or engineering. When retaining a patent attorney, it is advisable to inquire about his or her technical areas of expertise. Similarly, attorneys that specialize in trademark matters have expertise in the area of securing trademark rights. Typically, a patent attorney will also be knowledgeable in the area of trademarks, or will work closely with others that are.

Once you’ve decided on representation before the USPTO, your attorney should have you sign an engagement letter outlining the scope and details of their representation. This may or may not include the costs for filing and prosecuting (or pursuing) the patent and/or trademark application. The costs to obtain a patent or trademark will include governmental filing fees as well as the costs that are incurred in the preparation and prosecution of the patent or trademark application.

44 // September 2017

Inventors are often wary of giving details of their invention to others for fear of it being taken and misused. However, it is important to remember that your patent attorney is your representative before the patent office and is working for you. Thorough communication with your attorney is critical to a successful outcome before the USPTO. Information exchanged between an inventor and his attorney is protected under the attorney-client privilege.

Filing for a patent is a large step to take, both in time and money. When done right, the patent process can be a very effective tool to protect your invention and elevate your business. When preparing a patent application, the attorney must have all relevant information relating to the invention, such as a detailed explanation, written description of the invention and detailed drawings. A patent must provide an enabling disclosure and sufficient written description for one of ordinary skill in the art to make or use the invention. Failing to provide the attorney with sufficient information will result in an application with fewer details and could result in an application that fails to meet the required level of detail under the patent laws.

One optional task to consider prior to applying for a patent is to perform a patent search to try to identify whether there are any other patents or patent applications relating to your product or service.

This is a step an inventor can perform through his patent attorney or on his own through a number of free patent search engines (e.g., Google Patent). The information received from the search may be used by the patent attorney to draft an application that has the highest likelihood of success, based on all of the information available to the attorney at the time the application was filed.

Depending on your timing and business situation, there are a couple of different ways to file a patent application. Often a quick and cost-effective approach is to file a provisional patent application. A provisional application is not examined by the USPTO, is not published, has fewer required sections and expires after one

The provisional application is effectively a place holder for your invention while things such as likelihood of commercial success, developing a business plan, securing investors and testing the invention, are evaluated by the inventor or others involved with the business.

www.THeAsphaltpro.com // 45

year. The provisional application is effectively a place holder for your invention while things such as likelihood of commercial success, developing a business plan, securing investors and testing the invention are evaluated by the inventor or others involved with the business. If a provisional application is filed, the inventor must file a non-provisional patent application prior to the end of one year from the date the provisional application was filed to prevent a loss of patent rights.

ALLU Accepts Settlement in U.S. Patent Infringement Lawsuit

On July 13, 2017, ALLU Finland Oy Ltd., headquartered in Teterboro, New Jersey, settled a patent infringement lawsuit in the United States District Court against Rock Tools Equipment LLC and Rock Tools Attachments LLC, of Greenwood Village, Colorado. The suit concerned technology relating to ALLU’s screening, crushing or mixing buckets.

ALLU filed the lawsuit March 24, 2017, in the United States District Court for the District of New Jersey. The patents at issue are United States Patents No. 7,954,263 and 8,122,620, owned by ALLU Finland. In the two companies’ settlement, Rock Tools admits that its model RTB20 infringes upon these patents. The company will permanently cease and desist in designing, manufacturing, or marketing any screening and crushing buckets that infringe upon ALLU Finland patents.

The company also will remove descriptions and images of the disputed products from its website and social media pages.

According to ALLU USA President Edgar J. Chavez, “The patent system within the U.S. and across the world is meant to encourage and reward innovation. Without enforcement, the system would be pointless. ALLU Finland will defend its patented innovations in courts of law any time they are infringed upon. We appreciate the cooperation shown by Rock Tools in resolving this lawsuit amicably.”

ALLU Group offers a complete line of screening, crushing and soil stabilizing equipment and attachments for the asphalt, compost, environmental, recycling, green waste, demolition, mining and pipeline industries. ALLU Group is ISO 9001:2000 certified. For more information, contact ALLU Group at (800) 939-2558 or usa@allu.net.

The patent application must include a written description of the invention, at least one claim outlining what the inventor believes is the bounds of the invention, and any drawings required to understand the invention. Additional sections may be added, including a background of the invention and a brief summary of the invention. If you file an application for a patent, you should discuss what each section of the patent application means with your attorney and be comfortable with the information provided therein.

Once the application is filed, it will be assigned to an examiner at the USPTO. The examiner will search the invention claimed against prior issued patents, published patent applications and other public documents (collectively called the “prior art”). If the examiner finds that the invention fails to meet the requirements for patentability, the examiner will issue an Office Action. The applicant may respond to the Office Action, and this process can continue back and forth with the patent office until either a patent is granted or the application is abandoned.

The process for securing federal trademark registration is similar to the process for applying for a patent. A trademark functions as a source identifier to help consumers distinguish between products. A trademark registration is not required to use a mark, and common law trademark rights begin accruing the moment use of the mark begins. Common law rights are geographically narrow in scope, however. Therefore, depending on your business, federal trademark registration may be something to consider.

When applying to register a mark, your attorney will prepare the application, which sets forth the mark (which may or may not include a design), what goods or services the mark will be used with, and whether or not the mark is already in use in interstate commerce.

A trademark examiner reviews the application to ensure that the mark is not confusingly similar to any other federally registered marks. If the application passes review, the mark is published for 30 days, giving third parties a chance to challenge registration if the third party feels that the mark is too similar to its own brand.

Because trademark registration is based on the applicant’s use of the mark in interstate commerce, registration will occur once the applicant successfully shows evidence that the mark is being so used. Trademark registrations may be maintained indefinitely so long as the mark is used and the proper renewal documents are filed.

There have been many great improvements made in the asphalt industry and many more to come. Protecting your intellectual property is a powerful tool that can provide much needed protection to your ideas and innovations.

– By Brian mac and anna quinn

An ALLU bucket crushes recycled asphalt.

46 // September 2017

Brian Mack and Anna Quinn are registered patent attorneys with Lathrop & Gage LLP in Overland Park, Kansas. Their work includes counseling clients on various intellectual property issues including drafting and prosecuting patent applications, trademark applications, licensing patents, enforcing patents, and avoiding patent infringement. Their client base spans different technologies and industries including general mechanical, construction equipment, power generation, aerospace, energy, biological, and chemical industries. For further information, contact Mack at bmack@lathropgage. com or Quinn at aquinn@lathropgage.com, or visit www.lathropgage.com.

Image: © www.fotopizza.com

OUR RAP-UTATION PRECEDES US Ammann asphalt plants are new to North America, but we’ve earned a reputation around the world as a leader in the use of recycled asphalt (RAP).

• In 1982 Ammann technology led to the use of 60 percent RAP – the highest rate at that time.

• In 2007, an Ammann Universal plant broke new ground by producing mix with 100 percent RAP. Not a single stone of virgin aggregate was used.

• In 2014, our HRT (High Recycling Technology) plant produced mix with 99 percent recycled materials.

Tires and printer cartridge toner were transformed from waste to liquid AC. What’s next? Even more cost-effective use of recyclables so mix producers can provide green products at great prices. Learn more about the 99 percent recycled mix and other green efforts at www.ammann-group.com

For additional product information and services please visit : www.ammann - group.com PMP-1171-00-EN | © Ammann Group

product gallery

New and Updated Paving Equipment Focuses on Quality This month’s issue focuses on the beginning of quality control with good practices for the lab and mix design. Once you have a good mix, you’ve got to place and compact it with best practices as well. One of the compacting techniques that the experts at Hamm, a Wirtgen Group Company, of Nashville, Tennessee, shared is that of oscillation technology. The OEM stated that its research and development team pioneered the development of oscillation compaction in the 1980s. Here’s its description of the oscillation principle, and how it differs from vibration: “With vibration, a single unbalanced shaft generates the upward and downward movement of the drum, causing it to strike the ground at a rapid rate. In oscillation drums, on the other hand, two unbalanced shafts rotate synchronously, driven by a toothed belt. The unbalances are offset by 180° relative to one another. As a result, the drum performs a rapidly alternating forward/backward rotary movement.

“Due to this movement, the drum directs the compaction force into the substrate tangentially to the front and rear in the form of shear forces. Here, unlike with vibrating drums, the compaction force acts continuously on the substrate because the drum is in contact with the ground at all times. This is why oscillation rollers compact dynamically as well as statically with their intrinsic weight the whole time.”

Along with compaction equipment, OEMs have a variety of machines on offer to

T

Oscillation technology allows the drum to remain in contact with the mat continually.

Image courtesy Hamm, a Wirtgen Group Company.

48 // September 2017

assist contractors with quality asphalt paving and pavement maintenance projects.

Those responding to our request for information follow on the next few pages of this month’s paving product gallery. We’ll share the latest in production equipment and components next month.

Ammann

Ammann’s proprietary ACEecon compaction measurement system is now available as an option on Ammann APR 4920 and APR 5920 Reversible Vibratory Plates.

APR 4920 and APR 5920 are the two largest models of reversible vibratory plates that use a centrifugal clutch for their power transfer from engine to exciter. With the addition of ACEecon compaction system, Ammann extends its range of intelligent vibratory plates with two new machines.

ACEecon helps operators monitor compaction progress via an intuitive LED display.

The information it provides is designed to prevent operators from overcompacting areas where targets have already been met.

ACEecon uses technology similar to other Ammann Compaction Expert (ACE) products developed for larger Ammann machines, including soil and asphalt compactors. ACEecon is already available on Ammann APH Hydrostatic Vibratory Plates.

For more information, contact Steve McCown at (904) 543-1691 or steve.mccown@ ammann-group.com.

Ammann America Inc. in Covington, Washington, now offers its ACEecon system for two reversible vibratory plate compactors.

The RS500 from BOMAG Americas has a forward operating speed of up to 164 feet per minute, and uses variable rotor speeds from 100 to 180 rpm to match rotor speed to the application.

BOMAG AMERICAS

BOMAG Americas, Ridgeway, South Carolina, has released the RS500 reclaimer with FLEXMIX. The extra breaker bar assemblies and an additional variable-position mixing door within the rotor chamber of reclaimer/stabilizer are designed to allow contractors to achieve consistent and controllable gradation with a simple toggle switch. The optional FLEXMIX, adjustable door is located above the rear discharge door to provide flexible mixing of material inside the rotor chamber.

For more information, contact Tim Hoover at (660) 580-0350 or tim.hoover@bomag.com.

CASE

CASE Construction Equipment of Racine, Wisconsin, has introduced two double drum asphalt rollers—the DV209D and DV210D. The new vibratory asphalt rollers offer a balanced drum design and a variety of standard features, including automatic vibration control, crab steering, an oscillating articulated roller joint and a pressurized, triple-filtration water system. An available high-frequency option allows for frequencies up to 4,020 vpm. A combination option is also available for both models, featuring a vibratory front roller and rear pneumatic tires.

The DV209D, pictured here, and DV210D from Case Construction Equipment are designed for groundline serviceability with large swing-out doors on both sides of the machine for easy access.

With operating weights of 21,080 and 22,930 pounds, respectively, the DV209D and DV210D are designed for municipal roads, parking lots and residential developments, as well as more large-scale paving applications such as highways, airports and industrial areas.

The new models feature a Tier 4 Final 100 HP Deutz engine.

An articulated roller joint oscillates + /- 6 degrees to maintain reliable drum-to-ground contact, and a standard crab steer design hydraulically offsets the rear drum up to 6.7 inches for precision work.

An optional compaction meter monitors material densities in real time so the operator can achieve precise densities without over-compacting. GPS mapping is also available.

The DV209D and DV210D feature a spacious, comfortable and intuitive operator environment with an adjustable sliding/ rotating seat that provides excellent visibility of the drum surfaces, edges and spray bars. The operator station also features a tilting and adjustable-height steering column and adjustable armrests with integrated control switches. A multifunctional display mounted on the steering wheel provides the operator real-time operation data, precision controls and diagnostics.

For more information, visit CaseCE.com.

Caterpillar

Caterpillar expanded the Cat® RP Series portable generators line with the introduction in May of the RP12000 E in the United States and Canada. The new generator fills out the top of the series, delivering 12kW of running power and new features. The generators are now available in the United States and Canada via over 550 Cat Home & Outdoor Power sales locations, which include regional and local retailers, traditional Cat dealers and online retailers.

Like other products in the series, the RP12000 E was designed by Caterpillar engineering teams based in Illinois and the United Kingdom. The team focused on power output, ease of use, run-time, low noise and other features.

• 670cc V-Twin engine • All-copper generator • Low-idle mode option • 9 receptacles including a 50A 240V outlet

www.THeAsphaltpro.com // 49

product gallery

The RP12000 E from Caterpillar is constructed of solid 35mm steel tubing, which is treated and coated to prevent corrosion and rust on the construction site.

• Removable lifting eye and handle • Balanced center of gravity For more information, visit http://www.cat. com/12kw

FMCG

FMCG Corp., Los Angeles, created the MagnetPal in 2013, but it recently received attention from DIY Network’s “I Want That” department at the 2017 National Hardware Show. Around the work zone or at home, the patented, military grade, 1-inch magnet is designed to lift up to 14 pounds. “In a lab environment, the tiny MagnetPAL can lift 14 pounds. We refrain from pushing this number as a consumer could try to lift an odd-shaped 14-pound object that does not balance, and they harm themselves.”

It uses rare earth elements such as Neodymium encased in strong ABS plastic. A spokesperson for the company told AsphaltPro, “It is generally safe around electronics.

We have not had any complaints of lost data or electronic problems.”

For more information, visit your local hardware store.

Hamm

The next generation of the HD+ series tandem rollers from Hamm, a Wirtgen Group Company, features Easy Drive and Tier 4 engines. Easy Drive’s principal components are the clearly arranged instrument panel with steering wheel and a multifunctional armrest with joystick and push-button switches. The Easy Drive system also includes a fully adjustable seat. Another feature of Easy Drive is its operating structure. A steering wheel is used for steering, but all other important functions are operated via the joystick and the multi-

50 // September 2017

For the model year 2017, Hamm HD+ Series tandem rollers will feature Tier 4 engines. function armrest. Here, the driver is able to see all the keys on the joystick. The operating elements are arranged around the joystick in such a way that the more frequently an element is used, the closer its position.

Operation is designed to be language-neutral.

Hamm uses color coding to achieve unambiguous assignment of the elements and a clear overview. The Easy Drive operating concept has already won numerous internationally recognized design awards.

Hamm also has something new to offer in the area of articulated tandem rollers, as all models in the HD+ series are now available with Tier 4 engines. In addition, all models with a drum width of 66 inches or greater come with the Easy Drive operating concept as standard.

For more information, contact Brodie Hutchins at (615) 501-0600 or Brodie. hutchins@wirtgen-group.com

John Deere

If you’re looking for bucket options in the work zone, your skid steer has 30 new ones from John Deere of Moline, Illinois. The OEM debuted its enhanced production series buckets for the 744K-II, 824K-II and 844K-III wheel loader models in May of this year. The buckets offer several new features, including an improved bucket profile, integrated narrow spill guards, bushed static bucket pin joints and optional wear plating. John Chesterman, the product marketing manager for the production class four-wheel drive loaders of John Deere Construction & Forestry explained the changes: “In speaking with wheel loader users in the field, they drove home the fact they wanted a bucket option that would increase production

John Deere of Moline, Illinois, debuted 30 new bucket options for four-wheel drive loaders in May with improved bucket profile and narrow spill guards, among other features. and offer greater efficiency in material retention. We worked with our engineers to develop 30 configurations that improve loading and visibility; are easier and quicker to repair; and extend bucket life in all types of material.”

When updating bucket design, John Deere added curved profile side cutters that are designed to improve material retention and allow for better bucket fill of loose material. Integrated narrow spill guards are designed to provide better visibility to the load so the operator can see when the bucket is full. This helps reduce loading time, fuel consumption and number of loads on the machine, and protects wheel loader linkage.

The enhanced production series buckets also feature bushed static bucket pin joints, which is a popular feature on the current 844K and 944K wheel loaders, according to the manufacturer. These pin joints reduce the need for welding and align boring for repair, enable repair in the field and reduce maintenance time overall.

John Deere is also offering improved, optional wear plates to extend bucket life. (Nonwear plate buckets are available with external cheek plates only for working with non-abrasive materials.) Wear plate buckets include external and internal cheek plates and wear liners on the floor.

For more information, visit www.

JohnDeere.com.

LeeBoy

In the second quarter of 2017, LeeBoy of Lincolnton, North Carolina, launched its 8520 Asphalt Paver. With variable paving widths up to 15 feet, it is built for the heavy-commercial paving market with heavy-duty undercarriage and track system, and these features:

1.866.643.1010 ClearSpan.com/ADAP

WE MANUFACTURE • WE INSTALL WE SAVE YOU MONEY The new 8520 Asphalt Paver from LeeBoy was on display at CONEXPO-CON/AGG.

buildings of 1,000 uses

• 106-hp Kubota T4F engine • Choice of high deck or low deck configuration • Dual electronic steering and sliding operator control station • Pressure ports for diagnostics and testing • HD Legend screed system with electric heat For more information, contact your local LeeBoy dealer.

Roadtec

The Roadtec CIR Additive System is used in the cold-in-place recycling of asphalt pavement in the repair and rehabilitation of asphalt-paved roads. The system is used to transfer, measure, and inject either emulsion or foamed asphalt to the cutter housing of the milling machine. The additive is then blended with the milled material and transferred for paving.

Roadtec CIR equipment is designed to repair damage to a roadway in one single pass, while reusing up to 100 percent of the existing material. The CIR process removes a portion of an existing asphalt pavement by milling to a depth of two to four inches, and then repaving it with reworked asphalt mix with additives. As the name implies, CIR is accomplished without heating the asphalt mixture, before or after placement. Depending on the structural requirements of the overall pavement and its intended use, the CIR typically receives a wear course such as a chip seal or HMA overlay to complete the road before returning it to traffic. Single unit systems do not include a method of screening and crushing.

Mounted to the rear of the milling machine, the CIR Additive System is the same width as the mainframe of the milling machine.

For more information, contact Eric Baker at (423) 265-0600 or ebaker@roadtec.com.

Fabric Structures

Hybrid Buildings

Foundation Solutions

ZERO PERCENT FINANCING AVAILABLE

restrictions may apply

An artist rendering of the heart of the Roadtec CIR Additive System www.THeAsphaltpro.com // 51

product gallery Sakai The SW654ND that Sakai launched at the 2017 CONEXPO-CON/AGG Conference in March offers an oscillatory tandem drum roller in a 58-inch drum width. The SW654 tandem roller’s fuel efficiency is based on a 3.3 L Kubota, Tier 4 engine coupled with Sakai’s new ECO Compaction Mode

(ECM), which the manufacturer states can reduce fuel consumption up to 37 percent.

• Side clearance 2.5 inches • Curb clearance of 28 inches • Maximum operating weight (with ROPS) is 16,250 pounds • Front axle load is 7,740 pounds • Rear axle weight is 8,510 pounds

New Sakai SW654ND features Sakai’s unique dual drum vibe/oscillation.

Electric heat from Process Heating Company improves your operation’s efficiency. How? •

Reduce Operating Costs: Electric heat is always 100% efficient, compared to fossil-fuel-fired heat that operates at only 50-85% efficiency.

•

Improve Asphalt Quality: Low-watt density heaters dissipate consistent, controlled heat on the sheath.

•

Reduce Maintenance: Drywell-style elements eliminate the need to drain tanks for service.

•

Increase Heater Life: PHCo electric heaters typically last more than 30 years.

•

Enhance Sustainability: No stacks, no emissions – and no expensive permits.

PHCo has been supplying customers with a cleaner, safer and more reliable heat source since 1947. To learn more, call us at 866-682-1582 or email info@processheating.com.

PROCESS HEATING COMPANY

www.processheating.com

52 // September 2017

The SW654ND is available with Sakai’s unique “ND” configuration. ND-series asphalt rollers have independent dual drum vibration or oscillation capability from twin eccentric shafts. Amplitude and frequency for the ND version of the SW654ND are 0.021 inches (0.52 mm) at 2,940 vpm.

“While vibration is still used on the overwhelming majority of compaction jobs to achieve density,” a spokesperson for the company said, “we are seeing more and more jobs spec’d as ‘no-vibe’ – meaning that you cannot engage your vibration.”

Sakai’s unique ND configuration, he said, increases versatility by giving paving contractors a choice between up-and-down vibratory action and the gentler forward-andback action of an oscillating roller on both drums. The selection can be made with a flip of a switch on the operator’s console for seamless transitions from the vibratory to no-vibe sections of a job.

For more information, visit www. sakaiamerica.com.

TITAN

Titan™ of Minneapolis expanded its PowrLiner™ series of line stripers in May with the introduction of the PowrLiner 3500 featuring PermaStroke Technology™ with no piston, packings or clutch. The striper is backed by Titan’s lifetime WearGuard® Elite™ fluid pump warranty. The PermaStroke Technology is engineered to deliver consistent pressure from 300 to 3,300 PSI. Maintenance is minimal with only two wear parts—the inlet and outlet valves. The PowrLiner 3500 also simplifies the cleaning process by holding less paint in its system.

It features a FlatLine Pulsation Dampener to eliminate fluctuations and deadband in the system. In addition, the Sureflo™

The PowrLiner 3500 from Titan™ hit the market in May with only two wear parts to minimize maintenance. pusher valve is designed to guarantee the sprayer primes every time it’s started.

It is powered by a Honda® engine. It comes standard with a Titan RX-80 gun, TR line striping tip and 50-foot hose. The cart is built with a swing-back design and two tip holders.

For more information, visit www.titantool.com.

VOGELE

The new Super 1700 3i and Super 1700-3i and Super 1703-3i from Vogele, a Wirtgen Group company, Antioch, Tennessee, are 8-foot pavers that combine the paver and screed in a single system with the front-mounted VF 500 extending screed. With the ErgoPlus 3 screed console, the screed can be adjusted for infinite variability in a range from 8 feet to 15 feet, 6 inches; or with bolt-on extensions to 19 feet, 6 inches. The entire material handling system of the Super 1700-31 and Super 1703-3i is designed for high output, starting with a receiving hopper with a capacity of 14.3 tons. The high-powered, separate hydraulic drives on the conveyor and auger support laydown rates of up to 770 tons per hour.

• Liquid-cooled, 4-cylinder Cummins diesel engine • Engine output of 173 hp at 2,000 rpm • Hardtop with extendable sunshade and comfort seats that swing out For more information, contact Brodie Hutchins at (615) 5018105 or Brodie.hutchins@wirtgen-group.com.

The front-mounted Vogele VF 500 extending screed features high stability for maximum evenness, according to the manufacturer. www.THeAsphaltpro.com // 53

product gallery Volvo Born from the Blaw-Knox legacy, the P4410B is the latest addition to the B-Series lineup of tracked pavers from Volvo Construction Equipment. It features an Ultimat®16 frontmount screed.

“The P4410B is designed to be the most utilized paver in any fleet,” said John Mooney,

product manager at Volvo Construction Equipment. “Whether the job is light highway or heavy commercial, the paver’s unique size, combined with its powerful engine, front-extending screed and ease of use make this machine a utility tool for any paving contractor.

Adding to its versatility is the ability to install most auto-grade and slope systems.”

LIBRA REMOTE PRINTER TERMINALS Are your ticket delivery methods stuck in the past?

Consider the efficiencies of keeping the driver in the truck and delivering tickets electronically!

Experience the Advantages: Printer • Document presenter holds ticket for driver and retracts it into an internal box if not taken • Loop print presenter ensures jam-free operation by eliminating user access to the document while it is printing • Best reliability of print head, cutter and presenter (2x to 10x over other thermal printers)

• Handles 3” or 4” wide paper and various paper thicknesses • Highest-speed printing • Exceptional print quality

Enclosure • Industrial enclosure designed to house printer and paper roll • Heat shield keeps printer cool in direct sun • Internal heater keeps printer warm in freezing climate • Motion-activated light illuminates when enclosure is opened

For more information, contact Libra Systems via email (sales@librasystems.com) or phone (215.256.1700)

54 // September 2017

P4410B can hydraulically extend to double the machine’s base width to a full 16 feet.

With a 98-inch transport width and an overall length of 17 feet, 10 inches, the P4410B can be easily transported along with a small asphalt compactor. Once on site, the Ultimat 16 screed can hydraulically extend to double the machine’s base width to a full 16 feet. Add additional extensions for an 18-foot paving width.

Dual screed consoles and remote controls are placed with ergonomics at top of mind.

The P4410B is packed with features typically associated with larger 10-foot machines.

Common controls with other Volvo pavers are designed to put the paving crew at ease upon first use. The machine also features large 20-inch foldable walkways, plentiful handrails, non-slip footing and glare-resistant hood paint for uncompromising safety and ease of movement around the platform.

The 60-inch low deck and 360-degree visibility around the paver, hopper, auger channel and screed enable the operator to check material flow at a glance.

Large opening panels offer easy access to daily checkpoints and filters, while strategically placed hydraulic test ports keep machine downtime to a minimum. Combined with the clean hose and harness routing, the practical design of the paver provides reliability and durability, according to the manufacturer. Maintenance-free auger and conveyor bearings eliminate daily and weekly greasing. Features such as uncomplicated hydraulics, long-lasting wear plates, simple drive chains, straightforward solenoid controls and the clutch-free design promote high machine uptime and keep repair costs low. With reliable Tier 4 Final engine technology, the operation can benefit from longer 500-hour regen intervals.

• Engine = Deutz TCD 4.1 L Tier 4 F • Rated engine power = 155 hp • Ultimat 16 weight = 6,500 pounds • Max paving width = 18 feet • Paving depth = 0.25 – 10 in • Paving speed = 0-242 fpm For more information, visit volvoce.com/na.

56 // September 2017

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Asphalt Drum Mixers

off the mat

Fix the Handbook T

The employee handbook can be one of your most important documents as an employer. It is used to introduce the organization to employees, inform them about corporate policies, mitigate risks for the employer and avoid unwelcome administrative scrutiny.

Despite all this, many employers create it and then forget about it.

A well fashioned employee handbook can affect litigation outcomes. Not only do you need to update your handbook, you need to communicate policy changes to your employees. At a minimum, do an annual review. Communicate any needed revisions to your employees either through a formal employee handbook update or as a standalone notice of policy revisions. For employers operating in multiple states and localities, consider state-specific addendums. Make sure to capture employee acknowledgments of all such notices.

If you haven’t reviewed it in a while, you may want to check that you do not run afoul of recent workplace judicial, legislative and regulatory changes. Here are some hot button areas to focus on: 1. Does your handbook include a non-retaliation policy? Almost half (45.9%)1 of all Equal Employment Opportunity Commission (EEOC) discrimination, harassment, wage & hour, etc., cases filed in 2016 contained a claim alleging retaliation. Retaliation is broadly construed and does not depend upon the merit or success of the underlying claim. Your employee handbook should contain a separate prohibition against all forms of retaliation as a standalone section and should specify who the policy pertains to: complainants, witnesses, investigation participants and those associated with the complainant. You should also include the prohibition in other applicable sections.

2. Misclassification of employee status as exempt or non-exempt remains a hot topic. Make sure non-exempt employees truly meet the definition of non-exempt. Are your job descriptions accurate? Bestowing the title cannot be a ruse to avoid overtime payments. Review the employee handbook for policies that impact non-exempt employees, such as working during lunch breaks, unauthorized overtime, working before or after regular hours, complaint procedure for wage/pay issues, etc. A big area concerns use of mobile devices during non-work hours. If you have policies that prohibit working after certain times or require approval to work overtime, make sure your human resources (HR) 1

department is enforcing them consistently. It may seem counter-intuitive, but you may have to discipline an employee for answering emails during non-working hours. Ensure that your policies are clearly laid out.

3. Disability, pregnancy and religious reasonable accommodation policies must apply to both employees and applicants. This area impacts both Leave and Equal Employment Opportunity (EEO) policy and should be included in both sections of your employee handbook. Also review whether your policy permits an interactive process that addresses the needs of the worker as well as the employer’s business needs when making accommodation request determinations. Employees are not entitled to the accommodation of their choosing and employers are not required to agree to those that impose an undue burden on their business. Managers should be trained to recognize and respond to accommodation requests. Although the employee or applicant should make the request, some employers have been found to be “on notice,” meaning they have been cited for not recognizing and accommodating an employee’s need before it was requested.

4. National Labor Relations Board decisions have impact beyond a union workforce. If your employment practices interfere with an employee’s right to engage in protected concerted activity you could have risk and the areas may include some you have never thought about.

Some areas recently impacted include employee use of a business’ email system and social media policies. Talking to another employee about a work problem or joining together to make changes in their wages, hours or working conditions is protected activity. Do you prohibit employees from discussing their salaries?

Confidentiality provisions prohibiting such discussion about salary or other terms and conditions of employment might be unlawful. Can you discharge an employee that uses profanity to describe a manager or his family on the employee’s Facebook account? The answer to this question depends on local laws, etc. Other areas include the use of email for non-business reasons, employee conduct policy/disrespectful or insubordination, social media, restrictions from leaving work. You could be in violation and your rule deemed unlawful.

5. New protected characteristics may have been added since your last update. These are ever expanding and particular to a locality. For in-

https://www.eeoc.gov/eeoc/statistics/enforcement/charges.cfm.

60 // September 2017

stance, New York City adds victims of domestic violence, sex offenses or stalking; consumer credit history, unemployment status, caregiver status. Make sure that you are training your managers on all protected characteristics for EEO, non-discrimination and harassment policies.

6. Paid time off and leave policies are changing. Is your Family Medical Leave Act (FMLA) policy current? Does it include leave for military related reasons, incorporate your state/local disability laws or intersect with your other paid time off policies? Sick leave laws may impact your policies in this area.

7. State and local laws can add requirements. California, New Jersey, Rhode Island and New York all have paid family leave laws. New York’s Paid Family Leave Law is effective Jan. 1, 2018, and will be phased in. It guarantees full and part time employees (employed for six months out of the year or more) up to 12 weeks paid leave for certain events. There is no small business exemption, prescription for a written policy and notice posting requirements. Employers may want to explore securing additional insurance. New York City has an Earned Sick Time Act, which requires employers with five or more employees to provide up to 40 hours of paid time off to address their own or a family member’s personal health issue. It prescribes what must be in your written policy. State and local “ban the box” laws restrict the extent to which an employer may be able to use criminal background checks in the hiring process. Is your hiring process compliant?

Consulting with an attorney or compliance professional can assist you in determining whether your employee handbook passes muster.

–By Lorraine D’Angelo Lorraine D’Angelo, a nationally recognized expert on legal and regulatory risk management, is the president of LDA Compliance Consulting Inc. She has more than 25 years of experience in the construction industry, including a recent tenure as senior vice president for ethics and compliance at a global construction company. D’Angelo is an accredited ethics and compliance professional and a leading expert on small, women-owned, minority and DBE matters, programs and policy implementation.

For more information, contact her at (914) 548-6369 or Lorraine@ldacomplianceconsulting.com.

MOBILE MONITORING NEW FEATURES Recon system is a mobile monitoring system created

by Heatec for monitoring equipment at an asphalt plant. The system provides real time status of asphalt storage tanks, and hot oil heaters directly to a smart phone.

The latest version mirrors your heater’s BurnerLogiX™ management system on your mobile device. The messaging feature keeps you updated with over 80 different messages, allowing you to easily monitor the status of your heater. With added clarity, monitoring your plant has never been easier. *Fireye® is a trademark of UTC Fire and Security Company

800.235.5200 www.heatec.com

H E AT E C , I N C .

Get alert messages directly to your phone, tablet or PC. Record trending data of temperatures, levels, and alarms.

Recon now gives the option to display metric units or conventional U.S. units.

Easily add the system to a new or existing plant. *some plants may require additional equipment.

an Astec Industries Company

5200 WILSON RD • CHATTANOOGA, TN 37410 USA 800.235.5200 • FAX 423.821.7673 • heatec.com

Here’s how it works

Step 1 RAP enters the system through the RT-500’s entry chute.

Step 2 The double-deck screen separates RAP by size.

Step 4 The crusher uses four hammer bars to downsize material

Step 3a Oversize material goes to the HSI crusher.

Step 5 All RAP ends up going to the pugmill mixer.

Step 3b Smaller material passes through the screen.

Step 6 Step 7 Reclaimed material exits the pugmill for paving.

Computer controls meter additive injection to the pugmill mixer.

Roadtec’s RT-500 Mobile Recycle Trailer When a project calls for cold in place recycling (CIR), contractors’ options include the RT500 mobile recycle trailer from Roadtec, an Astec Industries company, of Chattanooga. This trailer can either be pulled and fed by a milling machine for CIR operations, or set up onsite as a central coldmix plant to process up to 500 tons of material per hour. Here’s how the mobile option works: A cold planer removes an old pavement layer, feeding this material into the entry chute of the RT-500.

W

62 // September 2017

From there, the reclaimed asphalt pavement (RAP) moves onto the double deck screen of the RT-500. The 5- by 14-foot, low-profile, double deck, flat screen with fully adjustable amplitude and frequency, separates RAP material by size. It allows material of proper size to pass through, while oversize material is routed to the horizontal shaft impact (HSI) crusher.

The 3048 HSI crusher uses four rows of hammer bars and wedge design to downsize the material, and then recirculates it to the top deck of the screen. All RAP material ends up in the twin shaft, 6-foot pugmill mixer.

A computer-controlled additive system meters up to three additives to flow from tankers, which are either pushed or pulled by the cold planer, into the pugmill mixer to meet the RAP. Data flows from the belt scale, which is located between the screen and pugmill mixer, to the additive metering system, to ensure accurate additive injection to the pugmill.

The reclaimed material leaves the pugmill via a discharge conveyor or through a chute into a windrow when the RT-500 is used in the paving train.

For more information, contact Kyle Hammon at (423) 265-0600.

WE DELIVER SOLUTIONS. From our UNPARALLELED PERSONAL SERVICE to our HEAVY-DUTY MATERIALS and QUALITY CRAFTSMANSHIP, true customer commitment is evident in everything we do. We build long-term trusted relationships by helping our customers optimize overall plant performance and run at peak efficiency.

cwmfasphalt.com | 877. 457. 3938

RECYCLE/COLD FEED BINS

AC TANK

DUST-EATER® BAGHOUSE

Teach Your Crew What it Takes to Pave a Bonus-Worthy Mat

AsphaltPro magazine joined forces with hall-of-fame paving consultant John S. Ball III of Top Quality Paving & Training to bring you the newest online training resource for your crew: Asphalt Paving 101.

The course is available on any device, anytime, anywhere to train your entire crew. Your single subscription to the best curriculum of all time gives you access to train all of your employees, each time you bring in a new hire.

Asphalt Paving 101

In this course, your crew will learn: • How to stay safe on the job site • How to build a takeoff ramp • How to determine fluff factor • How to determine yield • How to prep for real paving in the real world • How to maintain equipment the right way • Job responsibilities for each paving crew member • and so much more…

Purchase your access to the course at: training.theasphaltpro.com

advertiser index Ammann............................................ 47

LDA.....................................................65

Applied Test Systems...................... 37

Libra Systems...................................54

Asphalt Drum Mixers........................58

Meeker............................................... 57

Astec, Inc........................ 17, 31, 37, 43

Process Heating...............................52

B & S Light........................................ 27 CEI........................................................ 4

Reliable Asphalt Products............................. Back Cover

ClearSpan...........................................51

Roadtec.............................................7, 8

CWMF Corporation..........................63 Dillman Equipment........................... 18

Stansteel AsphaltPlant Products............................................45

E.D. Etnyre......................................... 41

Systems Equipment...................15, 55

Fast-Measure....................................65

Tarmac International, Inc................49

Gencor Industries.............................. 11

Top Quality Paving.............................51

Heatec, Inc........Inside Front Cover, 61

Transtech...........................................53

Hot-Mix Parts...................................35

Volvo...................................................23

Ingevity..............................................33

Willow Designs.................................65

KPI-JCI-AMS.................................... 67

Wirtgen America..............................29

AsphaltPro’s Resource Directory is designed for you to have quick access to the manufacturers that can get you the information you need to run your business efficiently. Please support the advertisers that support this magazine and tell them you saw them in AsphaltPro magazine.

Because Reputation Matters.

The face of business is changing. Regulatory changes, globalization, as well as advances in technology such as social media, all contribute to your regulatory risk. Proactive risk management adds value and can differentiate you in the growing market as well as improve your bottom line. At LDA, we can monitor and detect potential problems and to prevent issues down the road. To learn more, call or visit our website.

914.548.6369

5700 Arlington Ave., Bronx, NY 10471 www.ldacomplianceconsulting.com

www.THeAsphaltpro.com // 65

Your tax deductible donations help support families that have lost a loved one, working on a construction site

Construction Angels, Inc. 501(c)3 Payroll Deduction Form Dear Construction Employee,

Construction Angels, Inc. provides immediate financial assistance to surviving children and spouse of a construction worker’s family when they lose a loved one to an onsite construction fatality. Your decision is yours alone to make, but Construction Angels will be there to help you or your friend’s family, pick up the pieces, if a tragedy such as this should occur.

Is your family prepared? Everyone expects to return home at the end of the day to our families, but for unforeseen accidents, the loss of a family member or friend is heartbreaking.

Construction Angels hopes you and your family will consider the option to support “One of our Own” in the construction industry.

Instructions • Use this form to file for deductions from your payroll.

• You can obtain additional copies of this form, by asking your HR department.

• Print in capital letters with blue or black ink. Give a copy of this form to your Employer.

• Note: Your deductions will be automatic every pay period.

• Visit www.constructionangels.us for more information about this charity you are donating to.

1. What would you like to do? (Check only one box, and then complete all sections of this form.) ❒ Establish Payroll Deduction (Check this box to establish payroll deduction for the first time.) ❒ Increase or Decrease Amount (Use this form to increase or decrease your deductions. To stop payroll deduction speak with your employer.)

2. Contribution Instructions (You must complete all applicable parts of this section.) ✓ Tell your employer how much to deduct from your pay each pay period.

The minimum contribution is $1 per week option, per pay period.

Please Circle Contribution Amount per pay period: $1 $2 $3

$4

$5

$10

✓ Tell your employer when to begin these deductions.

Unless otherwise indicated, your deductions will begin as soon as possible following receipt of all paperwork in good order.

Effective Date (MM/YY): ______________________________________ 3.Employee Authorization and Signature By signing below, I authorize my employer to process periodic deductions from my paycheck for contribution into the Construction Angels, Inc. Fund.

This authorization will remain in effect until canceled by me or by the Employer, Charity, or upon termination of my employment with my employer.

Employee Signature_______________________________________________________ Date___________________________________ Construction Angels, Inc. • 3640-B3 N. Federal Hwy, Suite 132 • Lighthouse Point, FL 33064 754-300-7220 Office • www.constructionangels.us

ProSizer Series

®

ProSizer® 3600 Look for the new ProSizer® 3600 designed to work in both recycle and aggregate applications to hit the market in 2017. Its robust 36” X 46” horizontal shaft impactor and up to 6’ X 18’ double deck screen will process slabby materials and RAP millings faster than ever. With the compact design the ProSizer 3600 is a one load move.

Learn more about RAP Processing Systems at kpijci.com

ASTEC MOBILE SCREENS

an Astec Industries Company

2704 WEST LEFEVRE ROAD • STERLING, IL 61081 USA • 800.545.2125 • FAX 815.626.6430 • kpijci.com

9’X38’ DRYER & 62,000 CFM BAGHOUSE • 9’X 38’ CUSTOM DRYER • ELEVATED FRAME STRUCTURE • SADDLE CHAIN DRIVEN • GENCO JET BURNER • 62,000 CFM GENTEC BAGHOUSE

• SIZE 49 EXHAUST FAN • 10X13 KO BOX • DRYER SET UP TO FEED A ROTARY MIXER • EQUIPMENT CAN BE SOLD SEPARATELY • CALL FOR DETAILS

RAP-13836 H&B 10,000 LB. BATCH PLANT

ASTEC 10’X40’ COUNTERFLOW DRYER

RAP-14645

RAP-15086

RAP-15047

• H&B 10K COMPLETE TOWER & ELEVATOR • CEDARAPIDS 10028 DRYER (NO BURNER) • 10X13 GENTEC RAP SYSTEM • HYWAY 2.0 MBTU HOT OIL HEATER • 100 TON BARBER GREENE SILO SYSTEM

• ASTEC 10’ X 40’ COUNTER FLOW DRYER • GRAVITY FEED INLET • TRUNNION DRIVE • HAUCK SJ750 BURNER

BARBER GREENE PARALLEL FLOW DRUM

PORTABLE GENCOR 8’X15’ RECYCLE SYSTEM

RAP-14952

RAP-14271

• 7’ X 43’ SHELL W/ 8’ EXPANDED ENDS • TRUNNION DRIVEN (4) 20 HP MOTORS • RAP COLLAR

• 94,849 CFM @ 5.1:1 • 18,598.23 SQ FT CLOTH • 20 SECTIONS • 4 ROWS OF 16 BAGS • 1280 BAGS TOTAL • 4 – 5/8” X 10’

RAP-15055

• GENCOR HAMMERMILL CRUSHER • 75HP MOTOR ON CRUSHER • 8X15 BIN OPENING • GRIZZLY

ASTEC 94K CFM PULSE JET BAGHOUSE

• 15HP MOTOR • 36IN FEEDER • 30IN COLLECTOR • TWIN AXLE

3Qualified listings 3Complete retrofit capability 3All types of component reconditioning

• CEI 2000G - 2.0 MBTU • 1993 MODEL • POWERFLAME COMBO BURNER • UPDATED CONTROL PANEL

H&B 4,000 LB BATCH PLANT

RAP-13330 • DISMANTLED AND READY TO LOAD

REFURBISHED CEI HOT OIL HEATER

ASTEC 42K CFM BAGHOUSE

RAP-14635

• 6’ X 30’ DRYER • GENCO ULTRAFLAME BURNER MODEL UF55 • 35K CFM BAGHOUSE • 150 TON SILO W/ ASPHALT ELEVATOR

• 10’ X 60’ TRUCK SCALE • 3 BIN COLD FEED SYSTEM

• NOMINAL 42K CFM • EXHAUST FAN / STACK • TWO SECTION • SINGLE MOTOR EXHAUST FAN, PADDLE WHEEL 200HP • ENCLOSED HOPPER AUGER • 10FT BY 4.5IN BAG

3Custom engineering 3Experience with all types of plants 3Complete plants and stand alone components VIEW ALL OUR INVENTORY ONLINE AT:

Inc.

PO Box 519, Shelbyville KY 40066 • Fax 502.647.1786

www.ReliableAsphalt.com 866.647.1782