Concrete Contractor February/March 2015

Hydration Stripe Offers Valuable Lessons

40

February/March 2015

SPECIFICATION GUIDE: Power Trowels 16

Building A Seaside Foundation On The Rock 12

Rehab Your Stamped Slab 28

Carrying On A

LEGACY

Two men, each from different firms, have stepped up to a world-class project to prove the next generation is ready to take the helm. 10 www.forconstructionpros.com/concrete

CONC0215_01_CoverFinal.indd 1

3/4/15 4:18 PM

Top that!

Ultratop 速 PC High-performance, polishable concrete topping

Ultratop PC is a high-flow, quick-setting, self-leveling, cementitious topping optimized for polishing. Suitable for both interior and exterior use, Ultratop PC is designed to be applied at 3/8" to 2" (10 mm to 5 cm) thick and cures quickly for fast-track resurfacing and polishing of concrete floors. Ultratop PC is suitable for applications including high-end residential units, retail stores, warehouses, schools, kitchens, airport hangars and loading docks. Ultratop PC is engineered to provide a thin resurfacing material that is extremely dense, hard and durable so that it is capable of holding a brilliant polish.

Contact your local Concrete Restoration Systems sales representative for more information or visit www.mapei.com.

CONC0215_02-3_TOC.indd 2

3/4/15 4:18 PM

February/March 2015 | Issue 2, Volume 15

WHAT’S INSIDE

COVER STORY 10 The Next Generation Takes The Challenge

Two men, each from different firms, have stepped up to a world-class project and prove the next generation is ready to carry forward the legacy of their fathers.

Features 12 Building A Seaside Foundation on The Rock This project might better be called the project from hell.

24 Rehab Your Stamped Slab Opportunity is knocking for concrete contractors to capture an incremental revenue stream.

32 MAPEI Provides System Solution for Repairing Bridge Deterioration over time causes bridge beams to torque and in order to repair it, structural reinforcement is needed.

40 Hydration Stripe Offers Valuable Lessons A contractor with 25 years of experience and a supplier of concrete products partner together to solve a puzzling mystery.

44 Not All Diamond Abrasives Are Created Equal Understanding the basics about diamond abrasives will lead to the best floor finish possible.

4 Editor’s Letter 6 Challenging the System 8 Legal Matters 16 Specification Guide: Power Trowel 36 Foundations Q&A 49 New Products

What’s Online Read these online exclusive articles at www.forconstructionpro.com/concrete

Cracks and Rebar Corrosion Do cracks increase the risk of steel reinforcement corrosion?

Search: 12039769

46 The Cleaning and Care of Polished Concrete Floors 12

Departments

It is necessary for contractors to have a good understanding of how to care for the floor once installed.

Legendary Football Stadium Gets Pumped The expansion and renovation of Lambeau Field is a project that has improved the game day experience for all fans.

Search: 12047206

www.forconstructionpros.com/concrete | February/March 2015 | Concrete Contractor 3

CONC0215_02-3_TOC.indd 3

3/4/15 4:19 PM

EDITOR’S LETTER

Have You Heard The BUZZ?

T

hat’s a wrap folks!

World of Concrete 2015 is now behind us and if you were at the show and felt the same “buzz” and heard the positive outlooks from both contractors and exhibitors, 2015 is going to be one heck of a year!

To recap, organizers of World of Concrete 2015 report the event drew 55,770 registered attendees, 1,459 companies exhibited their products and most notable, this was the largest World of Concrete in six years. I think it’s a fair assessment to say the market is coming back with a roar and contractors are poised to reap the benefits.

One of our favorite events at the World of Concrete is to hear Ed Sullivan, Chief Economist with the Portland Cement Association (PCA) present his annual economic forecast. This year’s presentation had Sullivan noting 2015 as a very optimistic year. In 2014, construction activity grew 2.5 percent and in 2015, Sullivan expects growth to accelerate to five percent. Additionally, cement consumption is expected to grow again by eight percent this year, and another eight percent in 2016.

Sullivan says consumer confidence is at a record high and with the addition of 250,000 new jobs every month, the core of the optimism stems from the labor market. Sullivan says skilled Facebook.com/ ConcreteContractor

Advisory Board

Ryan Olson, Editor ROlson@ ACBusinessMedia.com (800) 538-5544, ext. 1306

laborers will be embraced by the growth in the economy and construction activity and cement consumption will be impacted in a positive manner.

If you were unable to attend the World of Concrete, visit www.

ForConstructionPros.com/concrete and search using the term “2015 World of Concrete.” Doing so will lead you to our complete coverage of the show, including the latest product introductions, news, and photo galleries. Don’t forget to visit the Video Network for video interviews with industry leaders conducted in our booth during the show.

Finally, we’re excited to announce the February/March issue of Concrete Contractor will also include the launch of a fully interactive, free, IPad App. The app will include the full issue plus bonus content in the form of video, photos, and more. We have designed the app to give you a deeper, interactive experience. To access the app, visit the Apple Store and download it using the search term “Concrete Contractor” and see what we have in store for you.

Follow us @ Concreteinsider

Kim Basham KB Engineering Cheyenne, Wyo.

Jim Cuviello Cuviello Concrete Polished|Stained|Crafted Stevensville, Md.

Jim Baty Concrete Foundations Association Mt. Vernon, Iowa

Chris Klemaske T.B. Penick & Sons, Inc. San Diego, Calif.

Search: Concrete Polishing

Dennis Purinton Purinton Builders, Inc. East Granby, Conn.

Published by AC Business Media Inc.

201 N. Main Street, Fort Atkinson, WI 53538 (800) 538-5544 • www.ACBusinessMedia.com

www.ForConstructionPros.com/Concrete PUBLICATION STAFF

Nancy Terrill, (800) 538-5544, ext. 1248 nterrill@ACBusinessMedia.com Ryan Olson, (800) 538-5544, ext. 1306 rolson@ACBusinessMedia.com Kim Basham, Jim Baty, Brad Humphrey, David C. Whitlock, Joe Nasvik Ad Production Manager Cindy Rusch Art Director April Van Etten Sr. Audience Development Manager Wendy Chady Audience Development Manager Tammy Steller Publisher

Editor

Contributing Writers

ADVERTISING SALES (800) 538-5544

Jill Draeger Eric Servais Erica Finger Amy Schwandt Sean Dunphy Denise Singsime National Automotive Sales

FORCONSTRUCTIONPROS.COM

Digital Operations Manager

Digital Sales Manager

Editor

Managing Editor

Nick Raether nraether@ACBusinessMedia.com Monique Terrazas mterrazas@ACBusinessMedia.com Larry Stewart lstewart@ACBusinessMedia.com Kimberly Hegeman khegeman@ACBusinessMedia.com

CHANGE OF ADDRESS & SUBSCRIPTIONS

PO Box 3605, Northbrook, IL 60065-3605, Phone: (877) 201-3915 Fax: (800) 543-5055 • circ.ConcreteContractor@omeda.com REPRINTS Nick Iademarco at Wright’s Media (877) 652-5295 ext. 102 niademarco@wrightsmedia.com.

LIST RENTAL Elizabeth Jackson, Account Executive, Merit Direct LLC, Phone: (847) 492-1350 ext. 18 Fax: (847) 492-0085 • ejackson@meritdirect.com AC BUSINESS MEDIA INC.

Chairman President and CEO Executive Vice President CFO VP Content VP Marketing

Anil Narang Carl Wistreich Kris Flitcroft JoAnn Breuchel Greg Udelhofen Debbie George

Published and copyrighted 2015 by AC Business Media Inc. All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording or any information storage or retrieval system, without written permission from the publisher.

CONCRETE CONTRACTOR (USPS 021-799 , ISSN 1545-4193) is published 7 times a year: January, February/March, April/May, June/July, August/September, October/November and December

by AC Business Media Inc., 201 N. Main Street, Fort Atkinson, WI 53538. Printed in the U.S.A. Periodicals postage paid at Fort Atkinson, WI, and additional entry offices. POSTMASTER: Send address changes to Concrete Contractor, PO Box 3605 Northbrook, IL 60065-3605 February/March 2015. Issue 2, Volume 15 One year subscription to nonqualified individuals: U.S. 1 year: $35, 2 years: $70. Canada & Mexico 1 year: $60, 2 years: $105. All other countries 1 year: $85, 2 years: $160 (payable in U.S. funds drawn on U.S. banks). Single copies available (prepaid only) $10.00 each (U.S., Canada & Mexico), $15.00 each (International).

Canada Post PM40612608. Return Undeliverable Canadian Addresses to: Concrete Contractor, PO Box 25542, London, ON N6C 6B2.

Joe Reardon SASE Orlando, Fla.

4 Concrete Contractor | February/March 2015 | www.forconstructionpros.com/concrete

CONC0215_04-5_Editor.indd 4

jdraeger@ACBusinessMedia.com eservais@ACBusinessMedia.com efinger@ACBusinessMedia.com aschwandt@ACBusinessMedia.com sdunphy@ACBusinessMedia.com dsingsime@ACBusinessMedia.com Tom Lutzke, tlutzke@ACBusinessMedia.com (630) 484-8040

Concrete Contractor is the Official Media Sponsor of the CFA Foundation Company Certification Program

®

3/4/15 4:19 PM

CONC0215_04-5_Editor.indd 5

3/4/15 4:19 PM

CHALLENGING THE SYSTEM

Some Specifications Just Aren’t Fair

Ward R. Malisch, PE, PhD, FACI is concrete construction specialist for the American Society of Concrete Contractors. Reach him at wmalisch@ascconline.org.

Bruce A. Suprenant, PE, PhD, FACI, is technical director for the American Society of Concrete Contractors.

Reach him at bsuprenant@ bsuprenant.com.

Contractors should not be responsible for the design team’s quality control.

T

he Construction Specification Institute’s (CSI) recommendations for writing effective specifications contain the now familiar “Four C’s.” Specifications should be clear, concise, correct and complete. But the CSI “Project Delivery Practice Guide” includes an equally critical C requirement — coordinating the specifications. The Federal Highway Administration (FHWA) considers this to be so important that they have included it as the fifth C in specification preparation. But how are some specification writers on the design team coordinating the drawings, specifications and reference specifications? They are transferring their responsibility for construction document coordination by requiring the contractor to find all the conflicts caused by poor coordination, as illustrated by the following specification language: “In the case of a conflict between two or more terms in the construction documents, the more stringent term or higher quality material shall be required and an ambiguity shall be construed not to exist.”

No design team construction document coordination? Lack of design team quality control?

Negligent professional practice? No worries, make the contractor responsible for finding and paying for the conflict! This seems to contradict one of the basic elements of a contract between two parties: that both parties are acting in good faith.

Perhaps the design team is not aware of the CSI recommendations

on coordination, which are quite specific, as shown in the following selected excerpts from the “Project Delivery Practice Guide”.

Coordinating Drawings with Specifications “The drawings and the specifications are complementary, and both are needed to fully describe a construction project. Aspects of the specifications and the drawings may be clear, concise, correct, and complete, as to the information they convey, but unless the parts are coordinated with each other, the construction project may experience many problems and discrepancies.

Effective coordination and quality assurance programs must begin early in the design process and depend largely on continuous and effective communication among project team members.”

“Coordination must occur at all levels of the project team. Consultants must ensure that the drawings and specifications within their offices are fully coordinated. Various consultants must also coordinate their graphic and written materials among their respective offices. The responsible architect/engineer (A/E) must not only coordinate the drawings and specifications within the A/E’s own office, but also be responsible for coordinating the entire construction document package and for maintaining the communication process that will facilitate this coordination.”

Responsibility for Coordination “One person should be the coordinator and should have the

responsibility for reviewing consistency between the drawings and the specifications. In preparing drawings and specifications, the specifier and A/E should work together, keeping in mind the difficulties faced by estimators, bidders, contractors, inspectors, and product representatives. In many instances, the A/E is also the specifier. As the project design stage begins, a conference should be held that includes the A/E, the consultants, the drafters, and the specifier.

Specification preparation should proceed concurrently with design, and coordination should become a continuous process from the beginning of the project.”

This CSI document also provides a checklist of recommendations for conducting preliminary and final coordination at set milestones such as 50 percent completion and 90 percent completion. The CSI checklists refer to coordinating documents for omissions, overlaps, and duplications between disciplines; conflicts and discrepancies; difficult or impossible construction methods; incompatible materials and components; inconsistent terminology and abbreviations; and more. CSI states that these items should be considered within

6 Concrete Contractor | February/March 2015 | www.forconstructionpros.com/concrete

CONC0215_06-7_ChallengingSystem.indd 6

3/4/15 4:19 PM

the drawings and specifications for each discipline, between the drawings and specifications of separate disciplines, within the project manual, and between the project manual and drawings. This document also recommends that consultants review the drawings and specifications of other disciplines and forward corrections and comments to the A/E for communication to the other project team members. CSI cautions specifiers that checking construction documents is not the same as coordinating the separate portions.

Contractors must diligently prepare bids, but usually only three weeks pass between a bid notice and a bid letting. This doesn’t allow much time for determining quantities and pricing, and working with subcontractors and suppliers.

It definitely doesn’t provide the time needed to perform the quality control function that is the design team’s responsibility. In addition, the contractor does not have the same skill set as the design team in determining what conflicts exist in the construction documents.

Contractors also don’t make the final determination of whether or not a conflict exists. Instead, they send a Request for Information (RFI) to the design team identifying the two or more items they believe might be in conflict. But when the specifications require that the “more stringent term or higher quality material shall be required,” the design team’s response may be to agree that a conflict exists, identify the conflicting requirement that produces the highest quality result for the owner, and then tell the contractor to pay for it. This is simply inequitable.

A fundamental principle of construction agreement is that owners pay for benefits they receive from the new construction. When responsibility for coordination is transferred to the contractor and

the contractor does not discover conflicting specification requirements during bidding, the design team has essentially forced the contractor to pay for owner benefits. The switch from the owner pays for the benefit to the contractor pays for the owner’s benefits is all due to the design team’s abrogating its quality control responsibilities through contractual trickery.

On one project for which the “most stringent” provision was included in the specification, the contractor wisely excluded that specific provision in the ownercontractor contract agreement. We encourage all contractors to exclude these types of specification provisions in their contracts.

Ed. Note: For more information visit www.csinet.org.

www.forconstructionpros.com/concrete | February/March 2015 | Concrete Contractor 7

CONC0215_06-7_ChallengingSystem.indd 7

3/4/15 4:19 PM

LEGAL MATTERS

By David Whitlock

Now That You Are Hiring,

F

rom all reports, it is clear that the concrete industry is beginning to recover from recent economic woes. It is equally clear that hiring is increasing in the industry.

This creates the potential for future problems if contractors are not careful about hiring. Stable headcounts, whether high or low, make for simpler administration. When headcount numbers are in transition, however, labor and employment problems tend to arise. To hedge against problems, some contractors elect to classify workers incorrectly as independent contractors. Still others make the mistake of rushing to hire warm (presumably live) bodies and inadvertently bring problems into their workforce.

Like most significant changes to your business, increasing the size of your workforce needs to be undertaken carefully and intelligently. This may mean that you have to spend more time in the hiring process, but more likely, you will delegate much of this responsibility to human resources. You definitely need to ensure that the right hiring practices are being followed no matter how quickly you grow. Also, gradual increases in your workforce can expose you to legislative or regulatory requirements.

MISCLASSIFICATION Misclassification remains a huge problem in the construction industry at large. This is because contractors

David C. Whitlock has over 25 year’s experience in business immigration, compliance, employment counseling and training. He is the founding attorney of Whitlock Law LLC and can be reached at (404) 626-7011 or at davidcwhitlock@gmail.com.

are more than likely controlling that worker. When you exercise the right to control, you have an employee.

Note, the right to control test looks at numerous factors, and these are but a few of them.

RELYING ON A THIRD PARTY find it too easy to use itinerant or casual labor for short-term or project work that is relatively low skilled and fluctuating frequently.

Because these workers come and go so often, many contractors treat them as independent workers rather than payroll employees. This is quite dangerous.

The recent economic problems faced by many state and local government agencies have resulted in a renewed push to collect employment taxes. Similarly, at the federal level, misclassification is viewed as a taxation, labor, and sometimes immigration problem. Increasingly, the usually distinct and disparate state and federal agencies are cooperating, sharing information and investigative leads. This means that a contractor who incorrectly classifies a worker as independent may face penalties imposed by Internal Revenue Service, the Department of Labor’s Wage and Hour Division, Homeland Security, as well as state or local tax, worker compensation, insurance, or other agencies.

SO WHAT SHOULD A CONTRACTOR DO? First, it is important to know and understand the principle test used to analyze a misclassification problem. Although many agencies adopt different elements to the tests, the underlying principle is whether or not you are “controlling” the worker. If you are telling the worker how to do the work, when to do it, what tools to use, or what clothing to wear, you

Instead of classifying workers incorrectly, some contractors rely on third parties. You should know that the results of a contingent workforce acquired through a staffing company are dependent entirely upon the quality of the staffing company. Best advice — check references carefully before selecting a staffing company.

WATCH OUT FOR LUZIRS Whether you hire workers directly or transition contingent workers from temporary to permanent status, by all means avoid hiring LUZIRS — Lazy Undisciplined Zero-Interest Irresponsible Rude Slackers. The best way to avoid these bad hires is to consistently apply sound hiring practices.

Make certain you are looking in the right place for your future workers.

Use a well-designed application and do not rely upon a worker’s resume’.

Interview carefully, asking open ended questions that require the applicant to do most of the talking. Check references always. Finally, use an effective orientation process to make the new hire part of your team.

As you grow, be aware of your exposure under federal or state laws and regulations. For example, you become covered by Title VII discrimination prohibitions at 15 employees, age discrimination regulation at 20 employees, Family and Medical Leave Act requirements at 50 employees (within a 75 mile radius), and the Affordable Care Act at 100 employees in 2015. These are all federal statutes, and state or local laws and regulations may have different thresholds.

8 Concrete Contractor | February/March 2015 | www.forconstructionpros.com/concrete

CONC0215_08-9_LegalMatters.indd 8

5/4/15 1:38 PM

Floor grinding just got easier.

Introducing the Husqvarna PG 820 RC, our first remote-controlled floor grinder! The PG 820 RC offers very high productivity, powerful performance, and outstanding ergonomics. The remote control is key on this machine. It enables the operator to move around the jobsite, correcting hosing, moving the dust collector, inspecting the floor, and preparing the next set of tools. This leads to increased productivity and less fatigue on the operator. The remote control unit can optimize the grinding parameteres to assure quality for a specific application, enabling consistent operation and results even when changing operators.

The PG 820 RC is one of the most powerful and efficient machines on the market. It is an excellent choice for concrete floor preparation and repair, as well as all polishing and grinding applications.

17400 West 119th Street • Olathe, Kansas 66061 • T 800-288-5040 • F 800-825-0028 • www.husqvarnacp.com Copyright © 2015 Husqvarna AB (publ.). All rights reserved. Husqvarna is a registered trademark of Husqvarna AB (publ.).

CONC0215_08-9_LegalMatters.indd 9

5/4/15 1:38 PM

FLATWORK/SLABS

By Pete Reed

The Next Generation

TAKES THE CHALLENGE Two men, each from different firms, have stepped up to a world-class project and prove the next generation is ready to carry forward the legacy of their fathers.

A

ccording to RJ Burton, Vice President of Victory Unlimited Construction, the new Preferred Freezer Services project in Richland, Washington will be the largest public rack supported cold storage warehouse in the world.

Accommodating over 38-million cubic feet of cold storage, the 315,000 square feet of rack supported storage peaks at 116 feet tall. The facility includes an additional 142,000 square feet of office, rail and truck loading and mechanical building. The shipping area and office are enveloped with 125,000 square feet of tilt up panels and 500,000 square feet of Portland cement concrete (PCC) pavement.

In all, about 46,990 cubic yards of concrete was required to complete the project.

Poppoff Inc. of Moxee, Washington teamed with Joseph Easley Construction of San Jose, California to complete the division three concrete package. “At first it looked tough, but this is the type of challenge our company thrives upon,” says Matt Poppoff, Vice

President. Poppoff was selected to place and finish the massive project that included an aggressive schedule and the challenge of making mass pours in the heat of the central Washington dessert.

Poppoff Inc. was founded by Matt’s father Mike in 1977 and the company has constructed projects throughout the world. Dedicated supporters of the concrete industry, Mike was the ASCC 2014 President and the firm has long supported the industry regionally and nationally through associations such as AGC, ACI Northwest and the Washington Concrete and Aggregates Association.

Joseph Easely Construction was founded in 1994. Joe’s son, James, was selected to run the concrete package responsible for all the structural concrete, edge forming and reinforcing for the flatwork, tilts and concrete pavement. Essentially, both well respected firms were faced with the challenge filled with risk and sorting the logistics to meet both the schedule and the budget.

“This was no small effort,” Joe states. “Just the rebar package was amazing. We essentially had to buy all the available #6 rebar in the northwest region of the country to make this happen.”

The core of the project was a sixinch work slab topped with six-inches of rigid insulation and vapor barrier.

This work slab was then capped with a reinforced 18-inch mat slab that served as a structural member for the racking, as well as a performance slab in the main freezer warehouse.

“Logistically, the cold storage area drove the schedule and was the biggest challenge for the overall

Poppoff Inc. teamed with Joseph Easley Construction to complete the division three concrete package for the the new Preferred Freezer Services project. Pictured here, Matt Poppoff and James Easley.

Photo Credit: Poppoff Inc.

PROJECT PROFILE Project Owner: Chill Build LCC General Contractor: Victory Unlimited Construction Concrete Contractor: Joseph Easley Construction and Poppoff Inc. Ready Mix Supplier: American Rock Products Floor Consultant: North S. Tarr Concrete Consulting project,” Matt notes. “At any given time, each pour affected over 100 people when considering our crews for placing and finishing, ready mix and pumping operations all preceded

10 Concrete Contractor | February/March 2015 | www.forconstructionpros.com/concrete

CONC0215_10-11_Flatwork.indd 10

3/4/15 4:20 PM

KEY PRODUCTS Somero Enterprises Inc. Whiteman (Multiquip) Allen Engineering Corporation

The rebar package on this project forced the contractors to buy all the available #6 rebar in the northwest region of the country in order to complete the project.

Wacker Neuson Corporation by the insulation, forming and reinforcing crews.”

When all was said and done, the mat slabs were placed in pours as large as 54,000 square feet. More importantly, the specified F numbers for the slab averaged Ff75 well over the specified Ff50. Placement included three active boom pumps with an additional pump in stand-by mode. Poppoff utilized Somero SMP Power Rakes, two S-840 Somero laser screeds accompanied with a fleet of Whiteman, Allen and Wacker Neuson hydro-power riders. The base six-inch work slab to accommodate insulation, forms and reinforcing was placed in 3,000 yards per placement for the 18 inch slab. The sub slabs required approximately 1,000 cubic yards per placement and also included structural fiber.

“Even the small issues became serious when outlining our plan,” according to James Easley. “For example, we had over 10,000 base plates for the rack system in the cold storage and the reinforcing could not conflict with the base plate locations. It took some serious thought over eight acres to make sure this was all coordinated.”

To accommodate the schedule the coolant lines were placed in the work slab and it was up to James to insure Poppoff could still make mass placements with a laser screed.

“I loved the make shift rail system James came up with to make this happen,” Matt comments when discussing the many items that contributed to the project success. Tough, even to “old salts” like Joe Easely and Mike Poppoff, the “boys” were now carrying on the tradition.

The project was a big challenge for local ready mix supplier, American Rock Products, who managed pours as large as 3,190 cubic yard per pour

Photo Credit: Poppoff Inc.

with a production rate of 310 cubic yards per hour. “We managed to do this with just 12 ready mix trucks,” Brent Chigbrow, Operations Manager notes. “But it was a real stretch pouring all night while continuing our other services the next day.”

While it helped that the project abutted the Richland ready mix facility, the hourly production rates necessary to service three pumps was no small feat. All the pours were needed to be placed at night due to the heat of the central Washington high desert. Coordination of the forming and rebar was critical to accommodate the mass pours. “Something as simple as realigning the rebar and standees to support the weight of our screeds was essential to our success,” Matt notes. Scott Tarr, President of North S. Tarr Concrete Consulting was utilized as a floor consultant for the project.

EXTERIOR PAVEMENT After succeeding at the task of placing concrete for the building, Poppoff then focused on completing the 500,000 square feet of exterior pavement. Site grading required reverse slope of the pavement toward the building for collection and containment. Long owners and avid supporters of Somero laser screeds, Poppoff opted to upgrade to a 3D screed to accommodate the compound slope of the pavement.

“While a big investment, this project fully justified taking a step into the 3D world,” Matt says. “While it may be a common item in other larger markets, for central Washington this was a big step.” The 3D screed allowed for accelerated scheduling

while minimizing edge forming and meeting the strict drainage tolerances of the site. The eight-inch reinforced PCC pavement was placed in excess of 30,000 square feet per pour as the rack installation progressed.

This enormous self-supporting structure towers across the skyline.

Better yet, another generation of concrete contractors is facing the challenges and looking toward the future.

The rail dock and loading dock pours were 8” thick with #4 rebar on 18” centers.

The pours were done in four pours, roughly 30,000 sq. ft.

Photo Credit: Poppoff Inc.

FOR MORE INFORMATION Somero Enterprises Inc.ForConstructionPros.com/ 10074666 Whiteman (Multiquip) ForConstructionPros. com/10073969 Allen Engineering Corp. ForConstructionPros.com/ 10071889 Wacker Neuson Corp. ForConstructionPros.com/ 10075166

www.forconstructionpros.com/concrete | February/March 2015 | Concrete Contractor 11

CONC0215_10-11_Flatwork.indd 11

3/4/15 4:20 PM

FOUNDATION WALLS

By Joe Nasvik

Building a Seaside Foundation on THE ROCK This project might better be called the project from hell.

E

very year the Concrete Foundation Association (CFA), based in Mt. Vernon, Iowa, holds a contest to honor the best and most difficult foundation projects of the year.

So, Purinton Builders, East Granby, Connecticut, decided to submit their “Point O’ Woods” cabin retreat foundation and deck project located near Old Lyme, Connecticut.

Old Lyme is a small peaceful beach community along the Connecticut coastline. The coast has rocky points and sandy bays that owners of beach houses flock to during the summer months. However, building these resort homes can be a daunting project, especially when they are built on rock. That’s the challenge Purinton Builders accepted when they won the contract to provide the footings, piers and a concrete deck for a small resort home on an uneven rock point on the edge of the ocean.

The original cabin was run down;

PARTICIPANTS Architect: DEVEAUX ARCHITECTS – East Lyme, Conn.

Engineer: GNCB Consulting Engineers, P.C. – Old Saybrook, Conn.

General Contractor: Uccello Development- Nick Uccello Concrete Contractor: Purinton Builders – East Granby, Conn.

Ready-mix Producer: Kobyluk Ready-Mix, Inc. Concrete Pumping: Modern Concrete Pumping

resting on an old rubble foundation and the footprint was about 1,400 square feet. The lot size was approximately 50 feet wide and 150 feet long, all on rock with the front of the building cantilevering five-feet out. Water surrounded three sides of the project and there was almost no working room—additional safety equipment was provided as conditions dictated.

Dennis Purinton, President of Purinton Builders, says Old Lyme is a vacation area with “Hammer Law” rules in effect—no construction work is allowed from Memorial Day to Labor Day, so the construction season is fall and winter.

JOB CHALLENGES There were many challenges that made this construction a perfect candidate for the CFA contest: • FEMA regulations mandate floor elevations to be a minimum of sixteen feet above medium tide elevation. In addition, local building code requires the maximum height of the roof of a structure not be above a certain

Building the foundation for house on rock is no easy thing. Shown here are the footing pads and piers. Workers are beginning to form the concrete deck which will become the floor of the house.

Photo Credit: Purinton Builders

elevation. So for this project all vertical elevations were critical.

• The footprint of the new building was allowed to be minimally varied from that of the old building.

The owner wanted the maximum size building permitted so measurements were of high concern.

• The entire project was on rock with uneven surfaces and elevation changes as much as 10-feet.

Each footing pad was different and forms had to be scribed to fit each location. The rock surface under each pad required milling to create flat surfaces with no more than a 10 percent pitch.

• The owner and environmental requirements mandated that the site was to be left in pristine condition, so no concrete spillage was allowed anywhere and all

12 Concrete Contractor | February/March 2015 | www.forconstructionpros.com/concrete

CONC0215_12-15_FoundationWalls.indd 12

3/4/15 4:25 PM

CONC0215_12-15_FoundationWalls.indd 13

3/4/15 4:25 PM

FOUNDATION WALLS After layout the first step involved cutting and shaping the rock under each footing pad to make it flat.

Purinton subcontracted this work.

Photo Credit: Purinton Builders

anchoring was to leave absolute minimal scarring.

• A bridge over the only entrance to the community was a little too low for ready-mix trucks to pass under, so tires were deflated on one side and re-inflated on the other, a time consuming process that aged the fresh concrete.

• Purinton reports that on windy days workers got wet from waves spraying water as they hit the rock, making for cold uncomfortable working conditions.

• Materials and equipment had to be secured because winds were often strong.

LAYING OUT PADS AND PIERS With no flat surfaces and elevation differences of several feet, layout became the most difficult part of the job. “The elevation and center of the top of the piers was all we had,” says Purinton. “We knew the footing pads had to be 18 inches thick and the pitch of the rock under the piers couldn’t exceed 10 percent. Starting with the top center point of each pier we located each point in space in order to locate the bottom center point for each of the 12 piers.” They used a total robotic station and string line for this work, but Purinton says using the string line was the most helpful. After the points were located a subcontractor cut and chipped out the rock to provide the specified surface for the footing pads. Two of Purinton’s men worked half a day on each footing pad to scribe forms to the rock.

The plans also defined the top length and width of each pier so, working backwards, they laid out the tops of piers with string line. Then by measuring the length of each pier and calculating the five-degree pitch, they were able to lay out the bottom shape on each footing pad. The tapered piers were cut and assembled in their shop using 2x12 inch lumber, plywood and surrounded by Western aluminum forms.

Securing all the formwork so it didn’t move during concrete placement was also a challenge. They decided to use Hilti “Qwik Hus” screw anchors for rock—employing several thousand. Holes were drilled in the rock to receive the anchors that secured both forms and braces.

REINFORCEMENT With layout as the most difficult part of the job, placing the engineered reinforcement was the most critical. Large waves rolling up on the shore could potentially cause the floor slab to lift. The space under the floor is wedge shaped, with

the widest part of the wedge (10feet high) facing the ocean. Atlantic storms occasionally produce waves big enough to roll to the back of the wedge, pushing up on the floor slab. So the careful installation of reinforcing steel was all important.

All reinforcement was epoxy coated, vertical pieces were three-quarter inches in diameter (#6 bar) and horizontal members being five-eighths inches in diameter (#5 bar). Workers drilled 18-inch deep holes in the rock and anchored them with epoxy. Purinton especially likes Hilti products and bought their largest drill with a clutch for worker safety—if the drill-bit caught on something in the hole the operator wouldn’t suffer arm damage. It also featured a Hilti dustless drilling system with an attached vacuum and they were surprised to see how dust removal increased drilling efficiency.

Purinton’s son, Mike, enrolled in and passed, the ACI-CRSI “Adhesive Anchor Installation Certification Program” and set all the anchors to specification.

After concrete placement in the foundation pads, holes were drilled, rebar for the piers was installed and anchored with adhesive. The same procedure was followed on top of the piers to anchor rebar to the double reinforcing mats for the slab. In this way, a continuous load-path went from the concrete slab into the rock below.

Each footing pad form was scribed to fit the contour of the rock.

Rebar was adhesive anchored into 18inch deep holes for anchorage that would provide a load path to the reinforcement in the deck slab.

Notice the horizontal threaded bars used to hold the form securely in position.

Photo Credit: Purinton Builders

14 Concrete Contractor | February/March 2015 | www.forconstructionpros.com/concrete

CONC0215_12-15_FoundationWalls.indd 14

3/4/15 4:25 PM

CONCRETE REQUIREMENTS The biggest issue for the concrete on this project was durability— everything is exposed and gets regularly soaked by ocean salt water. So the engineer specified that concrete couldn’t exceed a 0.45 water/cement ratio. The mix contains 600 pounds of cementitious material, 30 percent being fly ash and slag. Six percent air entrainment is included for freeze-thaw resistance. A super plasticizer admixture was added to increase durability, allow a placing slump of eight-inches, and to keep the ready-mix concrete fresh longer.

In total, the job only required about 80 yards of concrete.

PLACING CONCRETE There was little room to work on the site and footing was especially difficult. Purinton said they employed the necessary safety precautions as dictated by the jobsite environment.

They also extended the deck forms just so there would be a place for workers to stand. The form is also being used by the contractor to construct the building.

Working under winter conditions concerned Purinton when they placed the deck concrete because it was only eight-inches thick—the piers were fine because the thick concrete produced enough heat for protection. So workers insulated above and below the deck forms and covered the top with plastic sheeting. Maturity meters were used to monitor the slab, five were located in the areas of greatest concern.

The requirements of ACI 306-10, tables 305.1 and 307.1 were followed.

Strength gain turned out to be uniform and there were no freezing issues. They were able to rent a concrete boom-pump that could fit under the bridge and everything was placed by pump.

EARNING PROFIT

to a project if it loses money,” he says. Purinton says this project was successful, his company achieved the profit they expected, in spite of considerable weather variables and the many unforeseen site challenges. “Our specialty is difficult projects like this, ones that most of our competition avoids, so we have learned how to bid them,” he says.

“But the many layers of difficulty presented in this job made it our most challenging to date and we particularly wanted it,” he added.

FOR MORE INFORMATION Hilti ForConstructionPros.com/ 10073283

SEPARATED AT BIRTH.

REUNITED ON THE JOB.

The Lackmond® STS-6 multi-application segmented turbo diamond blade and BEAST® Carbide masonry drill bits; for cutting and drilling look no further.

Contact us at 800-850-2044 or visit Lackmond.com

Jim Baty, the executive director of the CFA, says making profit on a very difficult project is one of the ground rules of their awards competition.

“There is no point to giving an award

www.forconstructionpros.com/concrete | February/March 2015 | Concrete Contractor 15

CONC0215_12-15_FoundationWalls.indd 15

3/4/15 4:25 PM

SPECIFICATION GUIDE: POWER TROWEL

Power Trowel

A compilation of technical information when choosing your next machine.

1 Allen HP-105 Ride-On Trowel

The all-new Allen HP-105 riding trowel is double the performance with double the power. Loaded with Twin EFI Kohler Engines and utilizing a Torque Converter Clutch system, it provides low speed torque with high rotor speed for finishing concrete quickly and efficiently.

ForConstructionPros.com/12039860 Model

Walk Behind or Ride-On

Weight (lbs)

Troweling Diameter

Rotor RPM

# of Blades

Steering: Mechanical/ Hydraulic

HP-105

Ride-On

1,180

101.5” x 50.5” x 59.5”

170

10

Mechanical

Model

Walk Behind or Ride-On

Weight (lbs)

Troweling Diameter

Rotor RPM

# of Blades

Steering: Mechanical/ Hydraulic

TWVE 424H4

Walk-Behind

122

65” x 43”

135

4

N/A

Model

Walk Behind or Ride-On

Weight (lbs)

Troweling Diameter

Rotor RPM

# of Blades

Steering: Mechanical/ Hydraulic

TWPC44613

Walk-Behind

315

46”

180

4

N/A

Handle Options

(Walk Behind Only)

N/A

Handle Options

(Walk Behind Only)

Twist Pitch, Fold Down Handle Handle Options

(Walk Behind Only)

Positive Pitch

Engine HP

Fuel Type

26.5

Gas

Engine HP

Fuel Type

4

Gas

Engine HP

Fuel Type

13

Gas

Engine HP

Fuel Type

2 HoverTrowel Pneumatic Walk Behind Models

Weighing less than 45 lbs., the HoverTrowel is a patented power trowel designed for finishing polymer toppings. Interchangeable high and low pneumatic motors make it ideal for most of today’s polymer toppings. A six-position telescoping handle, coupled with interchangeable guards creating 25” and 34” trowel paths make this trowel easy to maneuver in confined spaces and wide open areas. A HoverTrowel can be used for most epoxy, cementitious urethane, polymer modified, EPDM rubber and many other hybrid toppings with a variety of blades and floats. Its design makes these pneumatic motors easily interchangeable with the company’s four-cycle engine as well. ForConstructionPros.com/12039894 Model

Walk Behind or Ride-On

Weight (lbs)

Troweling Diameter

Rotor RPM

# of Blades

Steering: Mechanical/ Hydraulic

High Torque Air

Walk Behind

42

25” or 34”

0-60

3

Mechanical

Model

Walk Behind or Ride-On

Weight (lbs)

Troweling Diameter

Rotor RPM

# of Blades

Steering: Mechanical/ Hydraulic

Low Torque Air

Walk Behind

38

25” or 34”

0-60

3

Mechanical

Model

Walk Behind or Ride-On

Weight (lbs)

Troweling Diameter

Rotor RPM

# of Blades

Steering: Mechanical/ Hydraulic

4-Cycle Gas

Walk Behind

45

25” or 34”

0-120

3

Mechanical

Handle Options

(Walk Behind Only)

Telescoping

Handle Options

(Walk Behind Only)

Telescoping Handle Options

(Walk Behind Only)

Telescoping

I-R .76 hp Pneumatic

Engine HP

Fuel Type

I-R .41 hp

Pneumatic

Engine HP

Fuel Type

35 cc (Honda)

Gas

16 Concrete Contractor | February/March 2015 | www.forconstructionpros.com/concrete

CONC0215_16-23_TrowelSpecGuides.indd 16

3/4/15 4:26 PM

For 75 years, QUIKRETE® has been America’s top choice for building the strongest projects and bringing old ones back to life. With 150 manufacturing plants and over 200 professional-grade products, QUIKRETE has what you need for your next residential or commercial concrete construction job, no matter the size. To place your order today, call 1-800-282-5828.

WHAT AMERICA’S MADE OF.

CONC0215_16-23_TrowelSpecGuides.indd 17

3/4/15 4:26 PM

SPECIFICATION GUIDE: POWER TROWEL

3 EDCO T364 Walk-Behind Trowel

The model T364 is a 5.5 hp gasoline unit with an optional Leveling System for smooth troweling. It has a 36-inch troweling diameter, standard Lifting Bail and features bolt-on blades.

ForConstructionPros.com/12039874

Model

Walk Behind or Ride-On

Weight (lbs)

Troweling Diameter

Rotor RPM

# of Blades

Steering: Mechanical/ Hydraulic

T364

Walk-Behind

186

36”

118

4

N/A

Model

Walk Behind or Ride-On

Weight (lbs)

Troweling Diameter

Rotor RPM

# of Blades

Steering: Mechanical/ Hydraulic

T-364-3

Walk-Behind

192

36”

115

4

N/A

(Walk Behind Only)

Handle Options

Engine HP

Fuel Type

1

5.5

Gas

(Walk Behind Only)

Handle Options

Engine HP

Fuel Type

1

3

Electric/230 V

4 LR Tools Power Pole Finisher

Why wait for concrete to get hard? This easy-to-control tool is designed to start finishing on wet concrete, by using extension poles from outside the formed area, allowing the finisher to stay ahead of the curing process and establish an extremely flat surface. Ideal for decorative and special textures. No wiping out knee-board marks and footprints.

ForConstructionPros.com/10079459

Model

Walk Behind or Ride-On

Weight (lbs)

Troweling Diameter

Rotor RPM

# of Blades

Steering: Mechanical/ Hydraulic

Power Pole Finisher

Extension Poles

24

34

0-70

4

N/A

Handle Options

(Walk Behind Only)

Engine HP

Fuel Type

25 cc

Gas

N/A

5 MBW F46/4 High-Speed

MBW introduces a high-speed trowel for finishing of concrete under adverse conditions. Model 465199 is a 46” diameter machine powered by a GX390 Honda engine factory set to 3,400 engine RPM. The machine weighs 275 lbs. and offers a rotor speed range of 35 to 180 RPM. The wide range of rotor RPM is achieved through a variable sheave torque converter style clutch. Available with either conventional twist adjusting or Constant Force Pitch handles. ForConstructionPros.com/12040009

Model

Walk Behind or Ride-On

Weight (lbs)

Troweling Diameter

Rotor RPM

# of Blades

Steering: Mechanical/ Hydraulic

F46/4 HighSpeed

Walk Behind

275

46”

Up to 180

4

Mechanical

Model

Walk Behind or Ride-On

Weight (lbs)

Troweling Diameter

Rotor RPM

# of Blades

Steering: Mechanical/ Hydraulic

MK8-75 Lowrider Trowel

Ride-On

468

Twin 30” Rotors

Up to 130

8

Mechanical

Model

Walk Behind or Ride-On

Weight (lbs)

Troweling Diameter

Rotor RPM

# of Blades

Steering: Mechanical/ Hydraulic

MK8-121 Lowrider Trowel

Ride-On

940

Twin 46” Rotors

35 to 130

8

Hydraulic

Handle Options

(Walk Behind Only)

Twist or CFP

Handle Options

(Walk Behind Only)

N/A

Handle Options

(Walk Behind Only)

N/A

Engine HP

Fuel Type

Honda GX390

Gas

Engine HP

Fuel Type

Honda GX390

Gas

Engine HP

Fuel Type

Briggs & Stratton Vanguard 35

Gas

18 Concrete Contractor | February/March 2015 | www.forconstructionpros.com/concrete

CONC0215_16-23_TrowelSpecGuides.indd 18

3/4/15 4:26 PM

STRENGTH

IN NUMBERS If your project requires wood forms—massive or small, complex or simple—you won’t find a better company to take it on than UFP Concrete Forming Systems.

Our strength is in our numbers: the number and variety of projects managed by our team, the many dedicated account managers and service capabilities we offer from coast to coast, our unlimited access to lumber at the most competitive prices, and the products we develop that keep us on the cutting edge.

When you add it all up, you have a reliable partner you can count on for the success of your project.

That’s Value by Design.

Any way, shape or form.

Laramie High School | Laramie, WY Haselden Construction

To learn more visit

UFPconcrete.com CONC0215_16-23_TrowelSpecGuides.indd 19

UFP Concrete Forming Systems

3/4/15 4:26 PM

SPECIFICATION GUIDE: POWER TROWEL

6 MQ Whiteman HTXG6DF Dual Fuel Ride-On Trowel

The MQ Whiteman HTXG6DF dual fuel ride-on trowel features a 2.4 liter, dual fuel, gasoline-LPG engine from Power Systems International. The engine produces 68 hp (50.7 kW) and drives the HTX hydraulic system. The dual fuel capability allows quick transition for indoor finishing and requires no catalytic converter or DPF. This versatile engine also operates quieter than diesel powered HTX without sacrificing performance. Rotor speeds of 160 RPM provide the performance operators expect from a hydraulic drive trowel.

ForConstructionPros.com/12039930

Model

Walk Behind or Ride-On

Weight (lbs)

Troweling Diameter

Rotor RPM

# of Blades

Steering: Mechanical/ Hydraulic

HTXG6DF

Ride-On Hydraulic Trowel

2,174

92”

0-160

6 per rotor

Hydraulic

Handle Options

(Walk Behind Only)

N/A

Engine HP

Fuel Type

68

Gas / LPG

7 Bartell Morrison Inc. Mega-T

The Bartell Morrison high performance power trowels provide the contractor with reliable robust machines suitable for finishing large areas of newly laid concrete.

Available in a 46” variation, the Mega-T is manufactured from heavy gauge steel and jig welded to ensure complete rigidity, strength and long life. The Mega-T’s CVT transmission is coupled with a high horsepower engine, allowing for high torque at any speed. A sight glass for checking the oil level ensures the contractor trouble free operation and high production rates.

ForConstructionPros.com/12043798

8

Model

Walk Behind or Ride-On

Weight (lbs)

Troweling Diameter

Rotor RPM

# of Blades

Steering: Mechanical/ Hydraulic

B446 Mega T

Walk Behind

260

46”

25-180

4

N/A

Handle Options

(Walk Behind Only)

Engine HP

Fuel Type

11

Gas

Standard Fine Pitch or Easy Pitch; both with adjustable height

New Engine Choice for Wacker Neuson CRT 48-PS Series Concrete contractors can now choose between two gasoline engine options on Wacker Neuson’s 48-inch power steer (CRT 48-PS series) ride-on trowel product line. A new model, CRT 48-57K-PS, is powered by a 57-hp liquid cooled Kubota gasoline engine. It joins the 35-hp Vanguard air-cooled engine powered model, the CRT 48-35V-PS. The two models offer concrete contractors the ability to choose the power source that best fits their needs plus get all the benefits of Wacker Neuson’s patented two mode steering system and other high performance features. ForConstructionPros.com/12040035

Model

Walk Behind or Ride-On

Weight (lbs)

Troweling Diameter

Rotor RPM

# of Blades

Steering: Mechanical/ Hydraulic

CRT 48-57K-PS

Ride-On

1,500

48”

25-165

10

Power Steer

Model

Walk Behind or Ride-On

Weight (lbs)

Troweling Diameter

Rotor RPM

# of Blades

Steering: Mechanical/ Hydraulic

CRT 60-74L

Ride-On

2,65w0

60”/10 footer

25-145

12

Hydraulic

Model

Walk Behind or Ride-On

Weight (lbs)

Troweling Diameter

Rotor RPM

# of Blades

Steering: Mechanical/ Hydraulic

CRT 48-13A-V

Variable Speed Walk Behind

268

48”

25-200

4

N/A

Handle Options

(Walk Behind Only)

N/A Handle Options

(Walk Behind Only)

N/A

Handle Options

(Walk Behind Only)

Twist pitch, pro-shift, height adjustable, foldable

Engine HP

Fuel Type

57

Gas

Engine HP

Fuel Type

74

Diesel

Engine HP

Fuel Type

11

Gas

20 Concrete Contractor | February/March 2015 | www.forconstructionpros.com/concrete

CONC0215_16-23_TrowelSpecGuides.indd 20

3/4/15 4:26 PM

PROBLEM SOLVED

The MAKITA TEAL COLOR is the trade dress of Makita Corporation and is protected under common law and registered with the U.S. Patent and Trademark Office. *vs Makita 2-stroke Power Cutter The MAKITA BLACK & WHITE COLOR combination is the trade dress of Makita Corporation and is protected under common law and registered with the U.S. Patent and Trademark Office. MA-4281-14

NO MORE OIL MIXING

REDUCED COSTS

No 2-Stroke Oil Longer Piston & Cylinder Life

FAST STARTS*

40% Easier Pulls Pressure Compensated Carburetor up to

SUPERIOR HANDLING Less Vibration & Noise - 93.2dB(A) Retracting Aluminum Wheels

NEW 14” MM4™ 4-Stroke Power Cutter EK7651H

**Shown with optional 14” Ultra-Premium Segmented Diamond Blade T-02537

3D DIAMOND GRID TECHNOLOGY makitatools.com/MM4

2-STROKE vs. 4-STROKE

HOW MUCH COULD YOU $AVE? Use our Fuel Savings Calculator to see how much you could save by switching to 4-Stroke.

MakitaToolsPage

CONC0215_16-23_TrowelSpecGuides.indd 21

MakitaTools

MakitaPowerTools

MakitaTools

3/4/15 4:26 PM

SPECIFICATION GUIDE: POWER TROWEL

9 Chicago Pneumatic STG365

The new Chicago Pneumatic STG 365 power trowels create the finish operators require, while ensuring safe and reliable operation on the job. With unique ergonomics, the trowel is designed with low maintenance features and provides an efficient solution for troweling applications. The trowels have a new drive system and dead-man handle that automatically stops the handle from spinning when the operator drops or lets go of it. With a 36-inch troweling diameter, the STG 365 is used to finish the entire surface of concrete.

The STG 365 is complimented by the STG 465, which features a 46-inch diameter. The STG 245 is used for small edging tasks and offers a 24-inch diameter. ForConstructionPros.com/12043808

Model

Walk Behind or Ride-On

Weight (lbs)

Troweling Diameter

Rotor RPM

# of Blades

Steering: Mechanical/ Hydraulic

Chicago Pneumatic STG365

Walk Behind

168

36”

40-140

4

N/A

Model

Walk Behind or Ride-On

Weight (lbs)

Troweling Diameter

Rotor RPM

# of Blades

Steering: Mechanical/ Hydraulic

Chicago Pneumatic STG245

Walk Behind

130

24”

40-140

4

N/A

Model

Walk Behind or Ride-On

Weight (lbs)

Troweling Diameter

Rotor RPM

# of Blades

Steering: Mechanical/ Hydraulic

Chicago Pneumatic STG465

Walk Behind

196

46”

40-140

4

N/A

Handle Options

(Walk Behind Only)

Fixed

Handle Options

(Walk Behind Only)

Foldable

Handle Options

(Walk Behind Only)

Fixed

Engine HP

Fuel Type

5

N/A

Engine HP

Fuel Type

4

N/A

Engine HP

Fuel Type

9

N/A

22 Concrete Contractor | February/March 2015 | www.forconstructionpros.com/concrete

CONC0215_16-23_TrowelSpecGuides.indd 22

3/4/15 4:26 PM

10 Toro PT-36PP and PT-46PP Power Trowels

Toro power trowels feature contoured adjustable handles and a rotating stabilizing ring for precise handling that will deliver a smooth concrete finish. There are four models to choose from and each comes equipped with a Honda engine. The Toro Dyna-Clutch safety feature is incorporated into each unit and will stop the blade without shutting down the engine. The PT-36PP (pictured) and PT-46PP feature Toro’s patented Pro-Pitch blade adjustment system that provides smooth, quick pitch changes to ensure blades are at the optimal angle for a perfect finish. ForConstructionPros.com/10879819

Model

Walk Behind or Ride-On

Weight (lbs)

Troweling Diameter

Rotor RPM

# of Blades

Steering: Mechanical/ Hydraulic

PT-36 Power Trowel

Walk Behind

225

36”

50-130

4

N/A

Model

Walk Behind or Ride-On

Weight (lbs)

Troweling Diameter

Rotor RPM

# of Blades

Steering: Mechanical/ Hydraulic

PT-46 Power Trowel

Walk Behind

245

46”

50-130

4-combination

Mechanical

Handle Options

(Walk Behind Only)

Engine HP

Fuel Type

4.8

Gas (Octane 86 or higher

Adjustable

Handle Options

(Walk Behind Only)

Adjustable

Engine HP

Fuel Type

7.9

Gas (Octane 86 or higher)

Coming next month, the featured Specification Guide will include Screeds.

ONE VS MANY

COMPACT EXCAVATORS FACE OFF. SEE WHO WINS GOING HEAD-TO-HEAD. Do you want to see how compact excavators perform in head-to-head competitions or watch side-by-side comparisons relating to performance, serviceability and durability? Before you buy your next excavator, watch our video comparisons. Not only do the videos show you which excavator is best, they explain the small details that increase your performance and reduce your downtime. You can watch all the videos at BobcatAdvantage.com/FaceOff1 or scan the code and find out who comes out on top.

BobcatAdvantage.com/FaceOff1

1.877.745.7813

www.forconstructionpros.com/concrete | February/March 2015 | Concrete Contractor

Bobcat and the Bobcat logo are registered trademarks of Bobcat Company in the United States and various other countries. ©2015 Bobcat Company. All Rights Reserved. | 1169S-0 ®

CONC0215_16-23_TrowelSpecGuides.indd 23

23

3/4/15 4:26 PM

DECORATIVE CONCRETE

By Ryan Olson

Rehab Your STAMPED SLAB Opportunity is knocking for concrete contractors to capture an incremental revenue stream and it doesn’t require a full crew or a trailer full of forms.

S

everal products on the market allow the restoration, enhancement or alteration of the original color of a stamped concrete slab as well as creating an antiqued look with a secondary color. Contractors offering this service could profit from this simple, yet important process.

Todd Scharich, a decorative concrete specialist and member of the American Society of Concrete Contractors (ASCC) Decorative Concrete Council has identified four complete systems which will satisfactorily accomplish the rehabilitation of the stamped concrete slab.

RESTORATION PRODUCTS 101 Restoration products fall into two categories—solvent-based and waterbased systems.

A solvent-based system uses a solvent to drive color into the concrete surface.

A water-based system uses water to penetrate and polymers to create a chemical bond to the concrete matrix.

“For years, contractors had applied a colored sealer over the top of a surface. The downfall of this method is that colored sealer creates a very plain singular color surface, there is no secondary coloring,” says Scharich. “Realistic looking stamped jobs have a primary color, and a secondary color for low spots and the mortar joints.”

And this is where these product systems come into play. They all feature a secondary antiquing process by taking a dye or color that is translucent and spreading it over

the top of the surface and letting the pigment find the low spots.

“The joints in the pattern, the divots in the brick, and the low spots of a stone—whatever the pattern happens to be, there is always some definition; and that’s where the antiquing needs to be applied which produces the secondary color,” Scharich says.

The end result could be a tan brick and a medium gray color antiquing over it. Once it is dry, the slab can be sealed.

Scharich says in the past he has mistakenly performed this process using a solid stain mixed with a release powder. However, this effect leads to a tremendous amount of sealer failures. “The sealer fails because release agents are bond breakers, not allowing the sealer to stick to the surface, it peels off, and usually pulls some color with it. These new systems reduce the risk of failure.”

A word of caution: Some systems recommend a specific sealer, pay close attention to the manufacturer’s instructions. Keep in mind, when

This pool deck was restored to its original brilliance using the Original Solid Color Stain and Translucent Enhancer from NewLook International.

Photo Credit: NewLook International

using a solvent-based restoration product; use a solvent-based sealer.

When using a water-based restoration product; use a water-based sealer.

SLAB PREPARATION It’s important to note, none of these systems will work when placed over existing coatings. In order to determine if a sealer is present, a simple water test will usually do the trick.

Place a few droplets of water on the surface. If it beads, there is a coating on the surface. If the water droplets dissipate, it’s safe to say there is little to no sealer applied on the surface.

To begin the rehabilitation process, the contractor must make a choice between chemically or mechanically stripping the surface of the sealer.

The chemical stripping process usually includes a solvent-based product applied to surface using a mop or rag.

24 Concrete Contractor | February/March 2015 | www.forconstructionpros.com/concrete

CONC0215_24-31_DecCon.indd 24

3/4/15 4:26 PM

CONC0215_24-31_DecCon.indd 25

3/4/15 4:26 PM

UV Epoxy

UV Epoxy reduces ambering and prolongs shine to better withstand the relentless barrage of UV rays.

MIRACLE GLAZE H20 is an environmentally friendly, low VOC, waterbased urethane. Odor free, high gloss, chemical and abrasion resistant.

Miracle Glaze H2O

Crystal Coat The choice is crystal clear - Crystal Coat substantially decreases cleaning and maintenance costs.

Specifically formulated to withstand the harsh forces of Mother Nature.

CONC0215_24-31_DecCon.indd 26

3/4/15 4:26 PM

epoxy | Metallics | Natural stoNe | overlay | polyaspartic | urethaNes | sealers

Your talents and quality workmanship need not be held back by inferior or expensive products. McKinnon Materials’ products get the job done without any worries, leaving you able to focus on more important matters.

Industrial Epoxy For your convenience, opt for Clear Industrial Epoxy, Custom Tinted, or Rapid Set depending on the application specifications.

McKrete™ Our McKrete™ Overlay System works for you. Featuring 3 types tailored to your needs. Select the one that’s right for your temperature, thickness and job time frame.

With a longer pot life than our competitors, it provides less risk of material waste.

AURORA EPOXY DUST (Background photo) If you’re ready to create designer floors with 3 dimensional depth, but fear that you may not have the talent needed - Never fear, our user friendly Aurora Epoxy flows better and installs with ease.

CONC0215_24-31_DecCon.indd 27

coNtact us today! www.mckinnonmaterials.com Toll Free: 1-866-622-7031 Visit us on Facebook

3/4/15 4:26 PM

DECORATIVE CONCRETE However, green products such as a soy- based product may also be used.

If the contractor chooses to mechanically strip the surface, a light soda or sandblasting of the surface is required. Scharich says soda blasting is a more environmentally friendly process, but has fewer professionals offering the service.

REHABILITATION SYSTEMS CSI ReStore Concrete Stain CSI ReStore Concrete Stain from Helix Color Systems, a ChemSystems Inc. company, is a non-hazardous, ultra-low VOC water-based penetrating stain free of acid or acrylic.

The product consists of two products, CSI ReStore Solid Color Stain; a polymer modified water-based, solid color concrete stain that penetrates the surface of concrete, forming an opaque, breathable finish that does not require a sealer.

The second product, CSI ReStore

Translucent Stain is used over CSI ReStore Solid Color Stain in a contrasting color to produce an antiquing effect.

“This product is very easy to work with and one of the things I like about it is how clearly labeled it is as a ‘kit’,” Scharich notes.

contrasting color to create an antiqued look on textured concrete surfaces.

“Once you remove the sealer from the surface, it’s really like re-staining with a color,” he says. “It’s very thin and the Highlighter Stains give it a realistic finished appearance without changing the texture.”

BRICKFORM Freestyle Pro / Freestyle Pro Highlighter BRICKFORM FreestylePRO is a concrete stain that penetrates and bonds with concrete surfaces. This water-based, opaque stain is ideal for restoring, changing colors on previously colored surfaces, or rejuvenating old, discolored concrete. The product allows you to create new color styles for your decorative concrete work in an environmentally sound, versatile and user friendly way. BRICKFORM FreestylePRO Highlighter Stains are designed for use over BRICKFORM FreestylePRO Solid-Color Stain as a

New Look International ORIGINAL Solid Color Stain & Translucent Color Enhancer New Look International’s ORIGINAL Solid Color Stain is a water-based decorative concrete stain designed to be used for existing, unsealed, interior or exterior concrete surfaces. The polymer-modified concrete stain formula penetrates the surface of porous concrete (as deep as the surface pores) and creates an opaque (solid), yet breathable finish.

The Translucent Color Enhancer is a water-based, translucent formula which when applied over the Solid Color

Industrial Grade Pressure Washers

Specialty Winches and Capstans for the Concrete Industry

WINCH

.com

Designed for Outstanding Performance and Safety

1.800.333.9274

BLOOM Mfg. Inc. www.bloommfg.com

Independence, Iowa 50644 FAX 319-827-1140 PHONE 319-827-1139 800-394-1139

“Custom Engineered Solutions Since 1910”

28 Concrete Contractor | February/March 2015 | www.forconstructionpros.com/concrete

CONC0215_24-31_DecCon.indd 28

3/4/15 4:26 PM

[

cov•er-up (n)

]

concealment or attempted concealment of a mistake or event, sometimes illegal

Two outstanding products from the SS Specialties collection:

SS Spray Base and Stamp Mix is LEGAL, GOOD LOOKING and COST EFFECTIVE. SS overlays will cover bad or stained concrete with a new surface and give concrete a new purpose, without an expensive tear out.

It is so easy using SS Spray Base and SS Stamp Mix it should be illegal. Lucky for you, it’s legal and available through Cimarron Wholesale!

SS Specialities products are carried at The Stamp Store and other decorative concrete retail outlets around the United States.

866-906-2006 | ssspecialtiesconcrete.com CONC0215_24-31_DecCon.indd 29

3/4/15 4:26 PM

DECORATIVE CONCRETE Stain, creates a vibrant, two-toned antiquing colorant. The Enhancer can also be used over existing stamped surfaces without the Solid Color Stain to revitalize the secondary coloring.

The Enhancer concrete stain is packaged in an easy-to mix three-part kit and is available in the same colors as the Solid Color Stain.

Concrete Earth RZTORE RZTORE is a three step, zero VOC solvent-based stamped concrete color restoration system designed to rejuvenate and enhance worn or discolored exterior stamped concrete surfaces. The RZTORE system is ideal for refurbishment of stamped concrete surfaces that have faded in areas from natural weathering exposure, been subjected to chemical or salt attack, abrasion damage from snow removal, or worn down from routine vehicular and foot traffic.

RZTORE is a fast, efficient system

that revives old stamped concrete and returns it to foot traffic in as little as eight hours.

RESTORATION = REVENUE The benefits of these products suggests the restoration job can be completed by a single person. “There is nothing here that requires a five man crew,” Scharich says.

Secondly, if you’re a contractor specializing in commercial or municipal projects, it would be good for the industry and the contractor to suggest revitalization to these public jobs that have been ignored for years. The biggest component to rehabilitating a stamped slab is maintenance, and it’s an important point to keep in mind.

“Municipalities need to be aware up front about the maintenance of a decorative concrete slab. One of the common questions I get is why does color fade? And the real answer is, it doesn’t fade. The color is still the

Engineered Concrete Performance

New Products

same. It’s the maintenance that affects how we see it. If you maintain a good sealer coat, the project will look new for a very long time.”

Ed. Note: Todd Scharich can be reached on the ASCC Decorative Hotline at (888)483-5288 or via e-mail at TScharich@ascconline.org.

FOR MORE INFORMATION Brickform ForConstructionPros.com/ 10072255 ChemSystems Inc. ForConstructionPros. com/10832912 Concrete Earth ForConstructionPros.com/ 12048875 New Look International ForConstructionPros.com/ 10074014

QUALITY SURVIVES WISCONSIN BUILT SINCE 1967

MBW, INC

SOLDIER CURVE TOOLS

• Automatically adjusts brick angles • Eliminates sloppy hand cut borders • Easily conforms to different radii • Works seemlessly with soldier course border patterns

Patent No. 8,672,580 B1

ARCADIAN STONE FORM LINERS

• Available Sizes: 8'L x 2 1/4"H 8'L x 4"H • Rustic texture • Works well for steps, wall caps, countertops, etc.

Manufacturing a complete line of Decorative Concrete Products

M B W, I N C • W W W. M B W. C O M

1-800-282-3388 | www.butterfieldcolor.com

C O M PA C T I O N & C O N C R E T E C O N S T R U C T I O N E Q U I P M E N T

30 Concrete Contractor | February/March 2015 | www.forconstructionpros.com/concrete

CONC0215_24-31_DecCon.indd 30

3/4/15 4:26 PM

www.luraconcretescreed.com

43’ Conical Pour

High FF-FL #

40 Degree Slope Downhill Strike Off

Boldt Construction Wet Screed Shoe

82’ Pour

Adjustable Curb Runner On Both Ends

Why buy a different screed for every job when this screed can do it all?

LURA LIGHTENING STRIKE is the only roller screed in the world that allows you to couple one tube to the next, making it easy to adapt to any pour. Call your local dealer for a demonstration today and see how the Lightning Strike can increase your bottom line by 30 percent or more.

“LET THIS SCREED HELP YOU BID BIGGER JOBS”

LURA Enterprises, Inc. • sales@luraconcretescreed.com Phone: 701-281-8989 • Fax: 701-281-8995 CONC0215_24-31_DecCon.indd 31

3/4/15 4:26 PM

CONCRETE REPAIR

By Diane J. Choate

MAPEI Provides System Solution for Repairing Bridge Deterioration over time causes bridge beams to torque and in order to repair it, structural reinforcement is needed.

J

EA, created by the City of Jacksonville to serve the city and surrounding communities, provides electric, water and sewer services while protecting the area’s natural resources.

According to company information, “JEA owns and operates an electric system with five generating plants, and all transmission and distribution facilities, including over 745 miles of transmission lines and more than 6,500 miles of distribution lines.

As part of a design/build project to maintain one of the generating plants owned by JEA, the Northside Generating Station, MAPEI was asked to come up with a repair solution using FRP composite materials (specifically carbon fiber) to strengthen the bridge beams and pile caps on the Flume Road bridge that spans Nichols Creek and links the generating station to raw materials barges from the Jacksonville Port Authority.

Deterioration over time had caused the bridge beams to torque, and they needed structural reinforcement. MAPEI worked alongside the contractor, Premier Corrosion Protection Services (PCPS), and the design engineer, B2 Engineering, LLC, to meet the requirements of the specifications.

The physical aspects of undertaking the project were challenging due to the extent of the damage in the concrete structure, difficult access to the repair area, an aggressive environment, low clearance between the repair area and the water, and environmental regulations.

MAPEI worked alongside the contractor, Premier Corrosion Protection Services (PCPS), and design engineer (B2 Engineering, LLC) to repair the bridge.

Photo Credit: Raul Ballester

MAPEI PRODUCTS AT WORK ON THE JOBSITE Much of the work on the bridge was at or just above water level, so the PCPS crews worked aboard a system of 30 rafts that were moved between the beams and pile caps.

The project consisted of repairs and structural strengthening of 63 beams, each 2’ x 2’ x 15’ long. Repairs were also made to 64 pile caps that were each 5’ x 5’ x 2’ thick, 15 of which had to be reconstructed due to the extent of deterioration.

The first step in the repair process was the removal of deteriorated concrete and the cleaning of corroded rebar that was exposed. The rebar was then coated with MAPEI’s Planibond 3C, which acts as a corrosion inhibitor and as a bonding agent for repair materials.

In areas where there was no exposed rebar, Planibond EBA was used as the bonding agent. In areas where deterioration was less than four inches deep, the concrete repairs were made with Planitop X mortar and Planitop XS mortar, depending on the open time needed for the application. Planitop X can be applied from featheredge to four

PROJECT INFORMATION Project Owner: JEA Concrete Contractor: Premier Corrosion Protection Services, Inc. Project Size: 1,500 cu. ft. of concrete restoration; 7,100 sq. ft. of FRP composite materials

inches per lift and is engineered to provide high early strength with ease of application. Planitop XS is an extended-working-time variation of Planitop X. For those caps and beams that had extensive deterioration (beyond four inches deep), the PCPS crews used MAPEI’s Planitop 15 mortar, which is well-suited for form-and-pour and form-and-pump applications where high early strength and flowability are required. Planitop 15 was extended with 3/8” pea gravel for the full-depth pours.

Once repairs to the beams and pile caps were complete, the second phase of operations involved structural strengthening with MAPEI’s FRP system. Carboplate E 170 was applied in four locations along the

32 Concrete Contractor | February/March 2015 | www.forconstructionpros.com/concrete

CONC0215_32-35_ConcreteRepair.indd 32

3/4/15 4:27 PM

CONCRETE REPAIR An American manufacturer of portable crushing, screening plants, trommels and conveyors

Toll Free 1-800-837-3344 Direct 1-740-927-3464

American Owned & Operated Videos & more on...

www.screenmachine.com

4043T Impact Crusher Spyder 516T Screen

The most affordable 80,000 lb impact crusher in the USA

When a machine is more than the sum of its parts, you’ll find us.

Spyder 516T Screen 5256T Impact Crusher

JXT Jaw Crusher

98,000 lbs Jaw Crusher with tramp iron relief

length of each beam—one strip along the inside face, one strip along the outside face and two strips along the bottom.

Next, MapeWrap C Uni-Ax 300 carbon fiber fabric was applied in 15 3/4” wide strips in stirrup fashion at 24” centers along the full length of the beam. Then, the entire beam was encapsulated with MapeWrap C Uni-Ax 300.

For the 64 piles, two layers of MapeWrap C Uni-Ax 300 were wrapped around the circumference of one end, and one layer was wrapped horizontally around the entire pile, all per B2 Engineering’s design. The epoxy system used for setting Carboplate E 170 and MapeWrap C Uni-Ax 300 included MapeWrap Primer 1, MapeWrap 12 and MapeWrap 31.

MapeWrap Primer 1 is used as a seal coat for consolidating and priming concrete substrates. After mixing, MapeWrap Primer 1 becomes a low-viscosity resin that is able to penetrate a cementitious pore structure and provide a high bond for the other components of the MapeWrap composite system on horizontal, vertical and overhead surfaces.

MapeWrap 12 is a two-component, 100 percent-solids, moisture-tolerant, structural epoxy used as an adhesive for the Carboplate composite system.

MapeWrap 31 is a 100 percent-solids, moisture-tolerant, medium-viscosity epoxy resin for impregnating MapeWrap composite system fabrics by a dry layup method. MapeWrap 31 was specially developed to saturate and encapsulate carbon and glass fiber fabrics and to cure to a high-performance laminate.

Once cured, MapeWrap 31 provides high mechanical strength properties.

As a final touch to the system, Mapeflex P1 SL was used as a joint sealant for expansion joints on the bridge deck, and Planitop 15 was used to restore the edges of the joints.

MAPEI was proud to be a part of this project that delivered a structurally sound concrete bridge.

FOR MORE INFORMATION MAPEI - ForConstructionPros. com/10073786

34 Concrete Contractor | February/March 2015 | www.forconstructionpros.com/concrete

CONC0215_32-35_ConcreteRepair.indd 34

3/4/15 4:27 PM

The Original & Patented Self-Cleaning Vacuum!

NEVER UNCLOG A FILTER AGAIN Other vacs can lose up to 50% of their suction as the filter clogs.

NOT PULSE-BAC.

A

C

TU

RING • AM

E R

E

RI

CA N

AN J O B S

MAN

IC

UF

Pulse-Bac is the original & patented vacuum that cleans its filters while you work. It does all this without a compressor to add extra weight or a button or lever that you have to stop working to push. Just turn it on and go to work.

AM

100% AUTOMATIC • CONSISTENT SUCTION • JOBSITE TOUGH

www.pulsebac.com © 2014 - 9384 Ridgeview Tulsa,OK 74131 • 866-954-9700

CONC0215_32-35_ConcreteRepair.indd 35

3/4/15 4:27 PM

FOUNDATION Q&A

By James R. Baty II

“DAMP RISING”

CFA headquarters has received numerous inquires regarding “damp rising”. What follows is an explanation of this phenomenon and whether contractors should be concerned.

Q

uestion: I have a homeowner that wants me to put a poly sheet over the footing before I begin forming the foundation wall.

He has read that water can migrate up through the footing into the wall and create mold problems for his home. Is this accurate? I’m concerned about the connection of the wall to the footing.

A

NSWER: One of the current en vogue issues in the residential concrete industry by owners and designers is that of a phenomenon known as “rising damp.” This condition, described as the transportation of sub-grade moisture surrounding a house foundation through the footing and concrete wall and into the living space, has become a frequent technical inquiry at CFA headquarters.

“Rising damp is a European

phenomenon produced from stone and block foundations rendered with stucco or plaster,” states Brent Anderson, P.E. of BDA Associates in Minneapolis, Minn. “Those foundations are tremendously hydrophobic, and permit large volumes of moisture to enter from the surrounding soils. They naturally move toward the warmer, dryer condition of the living space and then affect the adhesion of the plaster to the structural wall. Owners then have to remove the failing plaster and

36 Concrete Contractor | February/March 2015 | www.forconstructionpros.com/concrete

CONC0215_36-37_FoundationsQA.indd 36

3/4/15 4:30 PM

reapply, only to see the same thing happen in a few short years.”

Anderson, a long time champion for the quality of residential concrete, presented the subject of waterproofed concrete during the ACI 332 – Residential Concrete full committee meeting in Washington DC last fall. In attendance were many CFA contractors volunteering their time to help direct intentional transition of smarter codes and standards for residential concrete.

“It would take approximately 4,000 years for water to move through six inches of properly designed and delivered concrete,” notes Anderson. “Therefore, where is the concern for rising damp in today’s U.S. residential market? The best things that ever happened to residential concrete are the concrete pumps and conveyors. The design of concrete to take advantage of their efficiencies delivers an exceptional mix design to your footings and

walls. It then becomes an issue of ensuring the natural cracks that happen in concrete are controlled (proper reinforcement) and/or the water prevented from reaching those cracks (effective waterproofing system).”

You should take caution when considering placing a poly sheet as a barrier between the footing and wall.

This sheet can place the foundation wall at risk for movement during backfill, if it is not properly braced.

ACI 332 requires all foundation walls to be connected to the footing either by a dowel at 24-in. on-center or a keyway. If the wall is doweled to the footing, the moisture barrier theory cannot be 100 percent effective due to the perforations, assuming it wouldn’t tear during forming and removal in the first place. Instead, a better recommendation is to work with your customers to help them see the complete system that actually controls moisture infiltration

QUALITY. QUALITY. PERFORMANCE. PERFORMANCE. RELIABILITY. RELIABILITY.

beginning with the quality of your concrete. If the concern remains, a spray-applied membrane that contains an aggregate for surface roughness would be a far better suggestion, although this would be a suspender to an already strong belt.

Jim Baty is the Executive Director for the Concrete Foundations Association after having served as Technical Director since 2001. He is currently chair of ACI 332 and a voting member for ACI 306 with priorities of establishing better guidance and structure for residential concrete construction. For more information on this topic, contact Jim Baty at jbaty@cfawalls.org. Find out more at www.cfawalls.org.

SS-21

Gilson Silent Sifter®® • 7—10dB quieter than other rotary sifters.

• Built by Gilson, backed

by Gilson.

• Accurate & reliable results.

• In Stock & Ready to Ship!

Stainless Steel Wet-Wash Sieves • More affordable than traditional brass sieves.

• Non-corrosive under harsh conditions.

• Extra deep frames to hold wash water.

• Stainless Steel holds its shape under the rigors of repeated use.

800.444.1508 • globalgilson.com

www.forconstructionpros.com/concrete | February/March 2015 | Concrete Contractor 37

CONC0215_36-37_FoundationsQA.indd 37

3/4/15 4:30 PM

By Ryan Olson

Hydration Stripe Offers

VALUABLE LESSONS

A contractor with 25 years of experience and a supplier of concrete products partner together to solve a puzzling mystery.

P

rompted by his L.M. Scofield Inc. sales representative, Bart Rockett was urged to get involved in the LEED certification program to learn how polished concrete contributes to the Green movement. Rockett has been performing decorative concrete work since 1986. Five years ago he expanded his business to include polished concrete and thus, Philadelphia Polished Concrete, Inc. (PPC Inc.) was born.

Rockett purchased a 20-inch Vic International grinder and began offering polished concrete to his existing customers–primarily performing small jobs in basements and garages.

Last year, Rockett was offered a polished concrete floor job in the Alexandria Center for Life Science, a bio-tech research center in Manhattan, New York.

Rockett met with the general contractor and project manager, Tom Yearick of Shawmut Design and Construction and learned the architect of the project was KlingStubbens. “As the story goes, this project would have been one of

KEY PRODUCTS • L.M. Scofield Inc. • Jon-Don • Allen Engineering Inc. • Lavinia (Superabrasives)

The Alexandria Life Science Center is now home to a beautiful, high-end polished concrete floor. This is a one of a kind building with a floor that will last 100 years.

Photo Credit: Bart Rockett

38 Concrete Contractor | February/March 2015 | www.forconstructionpros.com/concrete

CONC0215_38-43_PolishingLead.indd 38

3/4/15 4:30 PM

NEW GENERATION

GRINDING AND POLISHING MACHINES

X

Electric, Propane, Self-Propelled, Remote-Controlled...

W E H AV E I T A L L .

superabrasive.com

CONC0215_38-43_PolishingLead.indd 39

3/4/15 4:30 PM

ASSEMBLING THE CREW

Bart Rockett says it took numerous attempts to lightly grind the floor to remove the hydration stripe.

A high-profile project such as the Alexandria Center for Life Science meant Rockett needed to assemble a crew who were the best of the best.

With the assistance of Ron Green, Rockett’s business agent, he joined the Brick and Allied Craftsman Local 4 and became the first union contractor in the state of New Jersey who specifically states, “we polish concrete.”

“The union gave me five of the best guys in my union; and that was very important to me. I needed a team who worked together all the time; who were familiar with each other,” he explains.

Photo Credit: Bart Rockett

STARTING THE POUR

the first Green and LEED buildings the architect would have worked on and they wanted the look of polished concrete in the lobby,” he explains.

The job consisted of pouring 10,000 square feet of flatwork with a two to three inch capping slab.

Approximately 1,800 square feet of the lobby was to be polished. The

PROJECT PARTICIPANTS • Contractor: PPC Inc. • General Contractor: Shawmut Design and Construction • Architect: KlingStubbens

crew of five men poured the concrete in sections—approximately 3,500 feet per day. In order to ensure a level and flat floor, the crew used hand screeds. The floor was finished with pans and finish blades on an Allen Engineering propane power trowel.

As the pour was completed, cold winter temperatures affected the time it took for the concrete to cure.

To accommodate the slow curing process, the crew waited seven days before covering the floor to protect it from other trades working on site. Five months later, the floor was uncovered and there was a

2015 Education/Certication Program Craftsman, Level 1 Programs • • • •

Ontario, CA Minneapolis, MN Seattle, WA Bethany, CT

More Information and Registration www.concretepolishingassociation.com/classes.php

Tradesman Webinars ✓ ✓ ✓ ✓

April 9 June 18 October 22 December 17

38800 Country Club Dr Farmington Hills, MI 48331 (443) 249-7919 info@cpaa-us.org

40 Concrete Contractor | February/March 2015 | www.forconstructionpros.com/concrete

CONC0215_38-43_PolishingLead.indd 40

3/4/15 4:30 PM

noticeable problem. A hydration stripe was visible.

“How could this be? We used a breathable membrane floor covering and we waited seven days to cover the slab,” he says. “There shouldn’t have been an issue.”

The finished floor was supposed to include a cream finish, high sheen and no stones. The architect of the project had specifically noted in the plans there was to be no aggregate visible on the floor. Taking care not to expose any aggregate, Rockett gave the floor a light grind with a white metal bond diamond.

“It took us 20 days to try to erase the hydration stripe, slowly, without exposing tons of aggregate,” he says. “We were trying everything we could to slowly remove the stripe without exposing aggregate.

Ultimately, we had to decide, either the stripe will be showing or the white aggregate.”

The lesser of two evils prevailed in this situation. In order to produce a quality product, a minimal amount of aggregate would be visible on the floor.

The clock was ticking. The Alexandria Center for Life Science was nearing the completion date. As

the building was being finished by other trades during the day, Rockett and his crew worked a second shift, (2:30 pm to 11:00 pm), grinding the floor slowly with a 30-inch Lavinia propane grinder to remove the hydration stripe.

The crew dyed the floor using L.M. Scofield’s Soft Gray dye. The

hydration stripes reappeared. “I was told that I would never get the stripes out,” Rockett says. “Guys who have been grinding floors for 20 years told me I wouldn’t be able to remove them. We continued to dye the concrete, but the hydration stripes were taking the dye differently. With surgical precision, we spent an enormous

Concrete Solutions

Free applications guide shows how to boost your productivity If you’ve never used highpressure water jetting, you’ll be amazed at what it can do — and how quickly.

NLB’s free PDF applications guide has a variety of examples, with links to videos that let you see for yourself how productive water jetting can be.

Download it today by scanning the QR code, or visit www.nlbcorp.com/applications/concrete/.

Then call your NLB regional branch (below) for a demo, and put water jetting to work for you.

The Leader in Water Jet Productivity When the floor was dyed the hydration stripes were taking the dye differently, creating additional work for the crew.

29830 Beck Road, Wixom, MI 48393 MI: (248) 624-5555, IN: (219) 662-6800, NJ: (856) 423-2211, LA: (225) 622-1666, TX: (281) 471-7761, CA: (562) 490-3277 www.nlbcorp.com • e-mail: nlbmktg@nlbusa.com

Photo Credit: Bart Rockett

www.forconstructionpros.com/concrete | February/March 2015 | Concrete Contractor 41

CONC0215_38-43_PolishingLead.indd 41

3/4/15 4:30 PM

The polished concrete floor at the Alexandria Life Science Center was dyed using Scofield’s Soft Gray dye.

Photo Credit: Bart Rockett

amount of time fixing something that shouldn’t have occurred.”

THE VALUE OF GOOD RELATIONSHIPS Frustrated and puzzled, Rockett looked to his 25-plus year long relationship with industry suppliers. He

says one supplier specifically helped save the project from ruin.

Brian Small, a sales representative from Jon-Don (Langhorne, Pennsylvania), has been in the surface preparation business for over 10 years. Rockett credits Small’s in-depth knowledge and ability to quickly offer solutions as a key component to solving the problem.

“I have a nice relationship with Jon-Don. Through every turn on this project, Brian would offer solutions for me to try,” he says.

Small recommended Jon-Don’s own line of diamond abrasives. “We used a bunch of different diamonds from Jon-Don. They were always available and always had product ready for me the following day. Had it not been for their knowledge and

THAT FEELING... ...it’s Friday, you’ve worked 60 hours to get the bid out. You just realized your take-off is short because the scale is wrong.

You won the job but you’re going to lose your profit.

service, I don’t think we would have been able to finish this project to the satisfaction of myself, the project manager or the owner.”

This was the first time Rockett had to deal with the hydration stripe and hopes it will be the last. While he isn’t entirely sure what caused this phenomenon, he theorizes, “The floor itself was at ground level. There is a parking garage underneath our slab.

The base slab was 10 inches thick. The only explanation we can think of, is at the time of the capping slab pour, the temperature outside was sub-freezing and the room we were working in was 50 to 60-degrees Fahrenheit. Clearly there was some temperature disparity and moisture must have developed between the hot and cold areas of the slab.”

Rockett’s advice to other contractors facing a pour during the winter months—take caution and pay attention to the curing process before

LEARN MORE: Concrete Contractor Adjustable Forms Adopts Tekla To Help Improve

tek.la/af-us

NEXT TIME USE TEKLA SOFTWARE

Create accurate, constructable concrete models with Tekla software.

The scale will be correct and quantity take-off quick, easy and complete. tek.la/concrete

42 Concrete Contractor | February/March 2015 | www.forconstructionpros.com/concrete

CONC0215_38-43_PolishingLead.indd 42

3/4/15 4:30 PM

Approximately 1,800 square feet of the lobby was to be polished at the Alexandria Center for Life Science.

Photo Credit: Bart Rockett

covering the slab. “Usually, manufacturers of floor protection products suggest waiting three days before covering the floor.

That’s certainly not the case, when cold winter weather affects curing time. We waited seven days. Next time, I would wait at least two weeks before covering the floor.”

Despite the problems, the Alexandria Life Science Center is now home to a beautiful, high-end polished concrete floor. This is a one of a kind building with a floor that will last 100 years. For PPC Inc., this was a challenging project which offered a few lessons to be learned, even for a veteran contractor like Rockett.

FOR MORE INFORMATION Allen Engineering - ForConstructionPros.com/ 10071889 Jon-Don - ForConstructionPros.com/ 10925039 L.M. Scofield Inc. - ForConstructionPros.com/ 10073614 Superabrasive Inc. - ForConstructionPros.com/ /10076302

TF: 877.786.5067 PH: 734.955.9311 www.kutritemfg.com

No matter how you kut it.

Born, bred and manufactured with tradesmen input and in mind of the need for flexibility and durability on your jobsite.

with Reverse Flow Technology

www.forconstructionpros.com/concrete | February/March 2015 | Concrete Contractor 43

CONC0215_38-43_PolishingLead.indd 43

3/4/15 4:30 PM

By Mark Elliott

Not All Diamond Abrasives Are Created Equal

Understanding the basics about diamond abrasives will lead the polished concrete contractor to the best floor finish possible.

W

ith the increasing popularity of polished concrete, it comes as no surprise that the number of tooling manufacturers and tooling options have grown tremendously.

Understanding how diamond tools work is a must to anyone who wants to be successful in this industry.

“We have seen many people jump in the concrete polishing business thinking it is all about running a machine and swapping diamonds, and that diamonds are all the same,” says mark Elliott, Concrete Products Manager at Superabrasive Inc. “But there is nothing further from the truth. We know how many variables are in the manufacturing process, and they all impact the performance of each tool.”

GRIT AND BOND The two terms most often used are grit and bond. Most diamond tools are made of synthetic diamond powder, measured in microns and called grit, and a bonding material, usually metal or resin, or a combination of

bonding materials. They are bonded together through injection molding, hot and cold pressing, electroplating, and vacuum brazing.

Each grit is designed to refine the scratch pattern, and the rule of thumb is each consecutive grit is to be approximately doubled in size, so it can remove the scratches of the previous step. For example, if you start with 30 grit, the next grit is 50 or 70, then 100 or 120, 200 or 220, 400, 800, etc.

Following proper grit sequence is a fundamental principle in concrete processing. Skipping a grit step will put you up against some serious scratched floor challenges. The grits steps are usually divided into three stages— grinding, honing and polishing.

GRINDING Grinding includes the steps from the lowest starting grit (it depends on the floor and application and could be as low as six grit but typically 30 or 50 grit) up to 120 grit.

The tools used here are usually V-Harr pads from Superabrasive, features a special combination of felt, resin, and diamonds for a premium shine. Photo Credit: Superabrasive Inc.

An important first step in prepping the surface for grinding is using brazed pads.

Photo Credit: Superabrasive Inc.

metal-bond tools, brazed tools for lippage removal and floor leveling, or pcd tools for coating and glue removal. There are many shapes and designs on the market — round button segments, rectangular segments, single, double or multiple, plugs, etc.

More importantly, especially in the initial cutting steps, is the bond or hardness of the tools. Many contractors have trouble understanding how bonds work relative to different kinds of concrete. Depending on the bonding material, abrasives have different hardness which determines how diamonds are exposed. Hard concrete requires a softer bond to prevent glazing and to allow new diamonds to get easily exposed for maximum cutting. Soft concrete requires a harder bond, so it can last longer (soft bond will cut, but it will wear out too fast on soft concrete).

HONING Honing includes the steps between 100 to 400 grit, the tools used in this stage are usually hybrids

44 Concrete Contractor | February/March 2015 | www.forconstructionpros.com/concrete

CONC0215_44-45_PCAbrasive.indd 44

3/9/15 10:13 AM

and/or resins. The hybrids, made of a combination of bonding materials — metals, resins, or ceramics (such as Superabrasive’s Calibra discs or HD discs), are especially useful for removing scratches left by the metal bond tools.

QuickChange plates are available in many sizes. Each plate holds either three or six pads, and each trapezoid pad features either one or two metal bonded buttons (or segments), allowing the operator to control the speed and aggressiveness of the grind.

POLISHING Polishing is from 800 grit up to 3,500 grit. The most popular choice for concrete polishing are resin pads/pucks, which are made of poly-phenolic and ester-phenolic.

Another good solution are pads that use felt and drops of resin, such as Superabrasive’s V-HARR premium polishing pads. Another thing to consider when choosing tools is there are bonds/tools designed for wet use only, dry use only or wet/dry use.

Improper use can cause problems like glazing, sticky residue on the floor, and so on.

“Following all the grits may seem like a lot of steps, but well-trained

Rapid Set

®

Photo Credit: Superabrasive Inc.

contractors know that this is crucial for proper floor refinement and achieving a good wear-resistant floor finish,” says Elliott. “It is tempting to buy the cheapest diamonds but concrete grinding and polishing is a very labor-intensive business and lost productivity and time spent redoing a floor is much more costly.”

Not all diamond tools are created equal, and should be chosen relative to a specific project. Knowing what kind of concrete you are dealing with is important for finding the right combination of bonds and grits

which will increase your productivity and ROI, and produce the best floor finish.

Mark Eliott is Superabrasive’s Concrete Products Sales Manager.

Superabrasive Inc. has been manufacturing diamond tools and equipment since 1987. Superabrasive manufactures the LAVINA line of floor machines, vacuums and tools for floor prep, polishing and maintenance. For more information call 1-800-987-8403 or visit www.superabrasive.com.

is the

SMARTER SOLUTION for your flooring needs • Easy installation with minimal maintenance • Place floor toppings the same day • Polish the next day

The complete way to REPAIR, RESURFACE & RENEW

VISIT CTSCEMENT.COM OR CALL 800-929-3030 TO LEARN MORE ABOUT: Polished Overlays & Toppings • Self-Leveling Underlayment • Acrylic & Epoxy Primers • Patching & Skim Coating • Interior & Exterior• Repair Mortars

www.forconstructionpros.com/concrete | February/March 2015 | Concrete Contractor 45

CONC0215_44-45_PCAbrasive.indd 45

3/9/15 10:13 AM

By Sean Martschinke

The CLEANING and CARE of Polished Concrete Floors

Along with possessing the knowledge about concrete floor installation, it is also necessary for contractors to have a good understanding of how to care for the floor once installed.

M

any installers of concrete floors, in both private homes and commercial facilities, are the first ones asked when customers want to know how to clean and care for their new concrete floors.

In commercial locations, contractors can expect such questions from cleaning professionals as well.

Custodial workers are very familiar with vinyl composition tile (VCT) floors, and most have worked with different types of stone floors or terrazzo, which is in the concrete floor family, but they are less familiar with maintaining polished and unpolished concrete floors. Invariably, the building managers, who are their customers, will give the cleaning professionals your name—as the installer—for instructions on care and maintenance of their new concrete floors.

It’s necessary for contractors to have a good understanding of how to care for the floor once installed.

DAILY CLEANING If no finish has been applied to the concrete floor, all that is generally needed is that the floor be dust mopped and damp mopped using a neutral-pH cleaner. Because there usually are no grout areas, no grout cleaning is necessary.

However, contractors should encourage their customers to use backpack vacuum cleaners instead of dust mopping the floor. Dust mopping generates a lot of airborne particles that can be harmful to the

one pass. Should cost issues arise regarding purchasing one of these machines, mention to your customer that in most cases an automatic scrubber can pay for itself in a few months because it improves worker productivity so significantly. After that, it pays dividends.

INTERIM CLEANING

A burnisher is a high-speed floor machine used to polish and clean floors.

Pictured is the Battery Glazer 17 floor machine that operates on green batteries instead of a standard power cord.

Photo Credit: Tornado Industries

cleaning worker and building users.

Plus it has a tendency to push dust and debris from one floor area to another. A new generation of light and comfortable backpacks has been introduced that pull soil and debris from the floor, instead of pushing it around. This is healthier for the cleaning worker, building users, and more effective as well.

On large concrete floor areas, like those in a grocery store, an effective automatic scrubber should be used.

A fully automatic floor scrubber is designed to apply cleaning solution to the floor, agitate or scrub it, wet-vacuum it, and then squeegee it dry, all automatically and all in

Interim cleaning is necessary if a sealant and/or finish has been applied to the floor and installers are encouraged to suggest to their clients that a sealant specially designed for concrete, and possibly a floor finish, be applied to the floor.

Interim cleaning also involves burnishers if a high-speed floor finish has been applied to the floor.

A burnisher is a high-speed floor machine used to polish and clean floors. The machine not only removes surface level marks and soils but leaves the floor with a “wet look” shine. While they come in different sizes and with varying features, an effective burnisher for larger commercial locations would have the following attributes: • 2,500 RPMs (rotations per minute) • Adjustable pad pressure (up to 30 pounds); more pad pressure may be needed to remove more difficult soils.

• Variable speed control, to address the needs of different floors and their finishes.

• A built-in vacuum; this helps prevent dust from being inhaled by the user or released into the environment.

46 Concrete Contractor | February/March 2015 | www.forconstructionpros.com/concrete

CONC0215_46-48_PCEquip.indd 46

3/4/15 4:31 PM

WOW YOUR CUSTOMER AND SMOKE YOUR COMPETITION IN JUST 5 MINUTES… How long does it take you to create an on-site mock-up or demo area for a potential customer?

And we don’t mean the actual grinding of the floor, here. We’re talking about the whole process you have to go through just to get your equipment running.

If your answer is longer than 5 minutes, you’re doing it WRONG. While your competition is finding out if electricity is available at the potential job site (and then trying to schedule an electrician or rent a generator just for the mock-up), you could be rolling out nearly 1,000 pounds of propane-fueled grinding POWER and start grinding in 5 minutes!

PACKAGE DEAL SCANMASKIN SCAN COMBIFLEX 800 PROPANE [FG-SC800P-EA] « « « « « «

Productivity rates of 750–1,290 feet 2/hour 100% fueled by propane!

Propane tank: 20 pounds 3-head planetary drive system; holds 9–18 tools Low-vibration design Solid steel construction—right down to the dust shroud « Weighs 970 pounds

ERMATOR T8600 PROPANE [OE-T8600P-EA] « « « «

$927.00*

18 HP Kawasaki motor Three tested and certified HEPA filters 410 CFM; 115 inches of water lift Mess-free drop-down dust collection

ERMATOR C5500 PRE-SEPARATOR [OE-C5500-EA] « Captures 90% of dust and debris « Extends life of dust collector filters « Mess-free drop-down dust collection

800.556.6366 www.jondon.com

No electrician. No generator. No problem.

Scanmaskin machines are built to WORK, not to be worked on.

Find out what else sets Scanmaskin machines apart at www.jondon.com/scanmaskin.

CONC0215_46-48_PCEquip.indd 47

*Based on a 60-month lease.

3/4/15 4:31 PM

• Battery powered provides the user much greater flexibility and maneuverability.

• Auto-motion propulsion provides a gentle push assist, reducing worker fatigue and improving worker productivity.

In many facilities, floors are burnished every evening while in others, floors are burnished less often, perhaps weekly or monthly.

RESTORATIVE CLEANING Restorative cleaning is typically necessary once or twice per year, however restoration cycles can be postponed if the two steps just discussed are performed regularly and properly. Restorative cleaning is labor intensive, which makes it costly.

It can also be potentially harmful to the environment. For both reasons, many end-customers prefer to delay the procedure. When a floor is restored, a low-speed floor machine (175 RPMs or

350 RPMs) is used to strip and remove all finish (or sealant) from the floor.

It is an involved process with many steps; however, once it is completed, the concrete should look much as it did the day it was installed. The next step is to reapply sealant or finish. In most cases, if a sealant is used, two thin applications are necessary. Once it has thoroughly dried, three to six thin coats of floor finish can be applied to the floor on top of the sealant. The more thin coats applied, the greater the shine.1 Contractors are advised to suggest one more thing to their customers: select trained floor care technicians. Floor care and maintenance is an involved, complicated process.

A trained technician will know how to address most challenges and will keep your customer’s concrete floor looking its very best.

Ed. Note: Sean Martschinke is a CIMS ISSA Certification Expert (I.C.E.) and the product manager for Tornado Industries, a manufacturer of professional floor care equipment as well as other cleaning tools and products. He may be reached through Tornado’s website at www.tornadovac.com.

References: 1. Some floor finishes are made for low speed floor machines and others are made for high speed burnishers.

A burnisher used on a low-speed floor finish will likely remove most of the finish.

FOR MORE INFORMATION Tornado Industries ForConstructionPros.com/ 10074945

Knowledge Is Your Competitive Edge Keep your competitive edge with print and digital learning resources from ATP. We publish a broad range of materials that build confidence by focusing on the skills and applications necessary to succeed on the job site and in the classroom.

ATP learning materials feature: • Effective Instructional Layout • Field-Related Applications • E-Textbook Options • Digital Learning Tools Scan here to visit our website for more product information.

@ATP_Connect Your Partner in Learning

800.323.3471•www.atplearning.com

48 Concrete Contractor | February/March 2015 | www.forconstructionpros.com/concrete

CONC0215_46-48_PCEquip.indd 48

3/4/15 4:31 PM

NEW PRODUCTS Introducing the MAKO FinStand and Base Plate 4.5 SAKRETE Introduces ShapeCrete Kingdom Products’ Imperial Vertical Wall Mix Imperial Vertical Wall Mix is engineered to be lightweight and exceptionally strong. Designed to make realistic stone, brick, block or any design you can imagine, Imperial Vertical Wall Mix is suitable for indoor or outdoor use and can be built up to 7 in. without sagging.

• It adheres to concrete, masonry, plaster, block, sheetrock, EPS foam and more • Imperial Vertical Wall Mix may be stamped, textured or carved up to 18 hours after the time of application • It can be colored with a variety of stain options including Kingdom Products’ Olde World Stain ForConstructionPros.com/12045593

ShapeCrete is an easy-to-use, just-add-water, shape-able concrete that can be poured, rolled, pushed or molded into an infinite array of custom concrete designs.

• ShapeCrete allows contractors to stretch the limits of their creative potential through concrete designs • Designed for simple workability in both thick and thin applications • ShapeCrete provides 30 to 60 minutes of working time and can be colored with concrete colors during mixing • ShapeCrete also doubles as a quick, easyto-use material for small everyday concrete repairs such as patching and repair for driveways, patios and walkways • ShapeCrete will be available Spring 2015 ForConstructionPros.com/12041403

MAKO Enterprises new FinStand and Base Plate 4.5 provides adjustable elevation control for concrete slabs and structural members.

• The FinCap, FinStand and Base Plate assembly is engineered to provide up to 1.25” (40mm) of adjustability for each setting • Patented, stay-in-place screed supports are fully adjustable for any slab 4.5” (115mm) or thicker • All-threads are available in seven different lengths to generate the desired slab thickness • Suitable for all types of flatwork; slab-ongrade, elevated decks, embankments, bridges, superflat floors, multiple mats and leveling sub-grade • Can be used with any type of screed, including: roller, vibrating or truss screeds, and wet, hand or laser screeds.

• Each FinStand will hold up to 1,000 lbs. when using a steel all-thread • Ideal for vapor barriers ForConstructionPros.com/12040220

Scratches and gouges costing you time and money?

GRIND. HONE. POLISH. FINISH.

Take the Pain out of Concrete Edge Finishing TM

WITH EDGING SYSTEMS FROM BLUE STAR DIAMOND A revolutionary TECHNOLOGY

design for edge polishing that improves the finish quality while reducing the scratches and gouging that metal cup wheels cause.

Get the result you want in fewer steps and at a lower cost.

Available in 4”, 5”, 6” & 7” for use on most hand grinders.

Buy BSD Edging Products from Leading Distributors Nationwide or online at BSDDiamond.com

2615 Aero Park Dr. | Traverse City, MI 49686 | 231.929.2121 | 800.662.0336

BSDDiamond.com

PROUDLY MADE IN THE USA

www.forconstructionpros.com/concrete | February/March 2015 | Concrete Contractor 49

CONC0215_49-52_NewProducts.indd 49

5/4/15 1:39 PM

NEW PRODUCTS Airtow 3D Series The 3D Series - Drop-Deck & Dump trailer is a ground-level loading equipment trailer, utility trailer and dump trailer all wrapped into one.

Lowers flat to the ground for safer, easier and faster loading and unloading • Load capacity of 8,000 lbs.

• Includes a full dump feature • Dual fold-down/spreader tailgate provides options when loading and unloading equipment and materials ForConstructionPros.com/12027286 •

The Next Generation of Concrete Forming Nailer Strips Unveiled by UFP Concrete Forming Systems UFP Concrete Forming Systems announces a line of nailer strips made using an industry-changing, fully-fibrous, extruded composite that offers strength, stability and durability unheard of in common wood nailer strips.

• The composite’s durability provides a virtually self-healing resilience without chipping, rotting, shrinking or swelling • Made in the USA • UFP Concrete Forming Nailer Strips are reusable time and again ForConstructionPros.com/12041992

INDEX ADVERTISER PAGE Advance Metalworking Company...........................50 American Technical Publishers................................48 Bloom Manufacturing Inc.........................................28 Bobcat.......................................................................22-23 BORIDE Engineered Abrasives...............................49 Butterfield Color.......................................................30 CDC Larue.................................................................35 Concrete Foundation Assocation...........................33 Concrete Polishing Association of America...........40 CTS Rapid Set Cement Mfg. Co.............................45 Ermator USA.............................................................36 GelMAXX...................................................................48 Gilson Co. Inc............................................................37 GMC..........................................................................52 Husqvarna Construction Products..........................9 IMEX Management, Inc............................................51 Increte Systems Inc...................................................49 Jon Don.....................................................................47 Kut-Rite Manufacturing............................................43 Lackmond Products, Inc...........................................15 LM Scofield Company..............................................5 Lura Enterprises, Inc.................................................31 Makita USA Inc..........................................................21 Mapei Corporation USA..........................................2 Max USA Corp..........................................................33 MBW Inc....................................................................30 McKinnon Materials, Inc...........................................26-27 Multiquip Inc.............................................................13 NLB Corp...................................................................41 Oztec Industries Inc..................................................7 The Quikrete Companies.........................................17 Screen Machine Industries, Inc................................34 The Stamp Store.......................................................29 Superabrasive Inc.....................................................39 TEKLA Inc..................................................................42 Trinic...........................................................................25 Universal Forest Products........................................19 Water Cannon...........................................................28

50 Concrete Contractor | February/March 2015 | www.forconstructionpros.com/concrete

CONC0215_49-52_NewProducts.indd 50

5/4/15 1:39 PM

Be Concrete 20-25 April 2015 Paris-Nord Villepinte - France

In t er n a t ion al E x h ibitio n fo r Equipm e nt a nd Te chnique s f or C on st r u ctio n a nd Ma te ria ls Indus trie s .

20-25 Paris-No

Avril 2 015

rd Villep in

te - Fra nce

YOur BA

dGe

visitOr

an event by

CONC0215_49-52_NewProducts.indd 51

Your free badge on

www.intermatconstruction.com INTERMAT c/o IMEX Management, Inc. Tel: 704.365.0041 - Fax: 704.365.8426 Email: rebeccaj@imexmanagement.com

code PROMOAcB

HOTLINE: +33 (0)1 43 84 83 86

BLOG

#intermatparis

5/4/15 1:39 PM

TOW LIKE A PRO. The new 2015 GMC Sierra 3500HD has the most standard trailering capability in its class.* Every 1-ton model is rated to tow a minimum of 13,000 lbs standard. Select models offer up to an available 19,600 lbs of class-leading conventional towing.** And with a fifth-wheel or gooseneck hitch, the available Duramax 6.6L V-8 Turbo Diesel has the power to tow up to 23,200 lbs.† Discover how capability like this makes the Sierra HD more than just a truck. It’s incredible thinking in the form of a truck.

THE NEW GMC SIERRA DENALI HD. THAT’S PROFESSIONAL GRADE.

*Before you buy a vehicle or use it for trailering, carefully review the trailering section of the Owner’s Manual. The weight of passengers, cargo and options or accessories may reduce the amount you can tow. **Requires 3500HD Crew Cab Dual Rear Wheel 4WD with available Duramax 6.6L V-8 Turbo Diesel engine. †Requires 3500HD Regular Cab Dual Rear Wheel 4WD with available Duramax 6.6L V-8 Turbo Diesel engine. Vehicle as shown, up to 22,600 lbs. ††Available OnStar 4G LTE in vehicles produced starting fall 2014. See dealer for vehicle availability. Requires compatible mobile device, active OnStar service and data plan. Visit onstar.com for details and system limitations. ©2015 General Motors.

All rights reserved. Denali® Duramax® GMC® OnStar® OnStar button design® Sierra® WE ARE PROFESSIONAL GRADE®

CONC0215_49-52_NewProducts.indd 52

††

5/4/15 1:39 PM

CONTRACTORS! JOIN US FOR THE LARGEST ANNUAL GATHERING DEDICATED TO THE CAST-IN-PLACE CONCRETE CONTRACTOR

THE CONCRETE FOUNDATIONS ASSOCIATION PRESENTS THE

2015 CFA CONVENTION COLONIAL WILLIAMSBURG, VIRGINIA | JULY 22-25, 2015

CONSTRUCTION FOCUS: PERFORMANCE MIX DESIGN

MANAGEMENT FOCUS: WORKFORCE DEVELOPMENT

CERTIFICATION | ROUND TABLES TECHNOLOGY SHOW | AWARDS GALA

REGISTER OR FIND OUT MORE AT WWW.CFAWALLS.ORG 113 FIRST STREET WEST | MOUNT VERNON, IA | 52314 | (319)895.6940 WWW.CFAWALLS.ORG | INFO@CFAWALLS.ORG CONC0215_33_CFARegional.indd 1

3/9/15 1:02 PM

Special Promo

For New MAX Users

BATTERY OPERATED REBAR TYING TOOL

Road & Bridge,Tilt Up, Pool Commercial Construction For more product info click here CONC0215_32-35_ConcreteRepair.indd 33

For jobsite demo click here 3/4/15 4:27 PM