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A L A BAMA CO NCR E TE I NDUSTRIES ASSOC IATION M AGAZ IN E | FA L L 2015


FALL 2015

ConcreteWorks is a publication of the Alabama Concrete Industries Association and features articles and photographs pertaining to product applications, educational opportunities, as well as innovative construction techniques impacting the industry. Please email rlindsay@ alconcrete.org with any comments regarding featured articles in ConcreteWorks or to suggest a story idea for a future edition. Rebecca Lindsay,

2

TABLE OF CONTENTS

Barbers Bridge

This past spring, Barber Motorsports Park

20

Another Look at Cracking Concrete

Even with many advances in concrete

added a jaw-dropping feature for park

technology over the past several years,

patrons. The new 460-foot long concrete

there are still basic concrete issues that

bridge allows spectators to get a bird’s eye

linger. Bill Goodloe takes another look at

view of the action on the track.

some of these issues while explaining steps

(ON THE COVER)

to resolve them.

7

22

Architect Spotlight

After living in New York for several years

Art Director & Editor

after college, Scott Steen came back to his

John Sorrell, Editor

Southern roots. With an extensive resume

Concrete News

For all of your up-to-date member and industry news

of notable projects in NYC, he’s now making quite a mark on the River Region. www.alconcrete.org www.mysaferoom.org

12

On The Rock

The use of concrete promises a strong

23

Legislative Recap

Read about the legislative issues in this

and stable structure, just what you would

past year’s Session, as well as what bills

want in a church. Read about how two

were passed and what issues were left on

Montgomery churches used the product

the table.

when building a firm foundation.

16

2015 Truck Rodeo

The 2015 Truck Rodeo was held this year in Talladega, and was the best one yet. Read all about the event, complete with pictures and a full list of participants and winners.

24

2015 Calendar


PROJECT SPOTLIGHT

B a r s b e r s r e b r Ba ’’ bbbrrriididdg e g e ge Just when you thought things couldn’t be

and 12 feet wide is the latest upgrade for

development for Barber Companies said that

more exciting, exhilarating or entertaining

the 830-acre racing venue. It connects the

founder George Barber thought the bridge

at Birmingham’s Barber Motorsports Park,

Barber Vintage Motorsports Museum, which

would be an interesting architectural feature.

they stepped it up a notch and installed a

was last year given the title of the world’s

pedestrian bridge over the track, allowing

largest motorcycle collection by Guinness

When Daniel Franklin, PE, Project Manager

park patrons to view the action below.

World Records, with the track infield.

with LBYD began work on the new concrete observation bridge at Barber Motorsports

The bridge, which measures 460 feet long

Don

Erwin,

vice

president,

corporate

Park, he was faced with the challenge of


PROJECT SPOTLIGHT

meeting the owner’s desire of a bridge with zero

“This was really a fast-moving project,

had about three and a half months to

joints. Including no joints in a concrete bridge

with the project just starting up right

finish up the bridge.”

of that size, ready mix is asking for a problem.

around

Based on modern jointing techniques, a

Franklin. “Mr. Barber asked that the

To control cracks in concrete, Franklin and

project of this magnitude would likely include

bridge be in place before the Indy race in

his team incorporated control joints not to

a joint every 10 feet. Some designers might

April, and we had only three weeks to put

prevent the crack but instead to hide the

even recommend a longitudinal joint down the

the design together in order to stay on

shrinkage cracks inside the joint.

center line of the bridge.

schedule. From that point, the contractor

Thanksgiving

2014,”

says

The new observation bridge overlooks the track at Barber Motorsports Park | Birmingham, AL

FALL 2015 3


PROJECT SPOTLIGHT

“The design of the bridge substructure

aesthetics, water tightness, and durability

was fairly straightforward – the main

of the concrete. Finally, research has found

challenge was the fast-track nature of the

their use to have minimum impact on

project. This was especially true because

compressive strength.

we had drilled pier foundations and had to work through the additional geotechnical

One area of caution for the designer is freeze

coordination that comes with having deep

thaw problems that could result in the project.

foundations,” Franklin says. “One notable

Some manufactures of shrinkage reducing

design feature was that we used shrinkage-

admixtures recommend that preliminary tests

compensating concrete on this project in

be performed on the concrete mixture prior

the concrete substructure - Mr. Barber was

to their use. Another area of concern when

adamant that he did not want to see cracks

using the admixtures is requiring a concrete

in the concrete, so we wanted to do what

testing firm who can properly run shrinkage

we could to minimize any cracking. “   

testing.

Shrinkage tests are much more

complex than standard concrete test and The concrete design used on the bridge

mandate ASTM approved labs.

is a typical concrete mix design, but TOP: Ribbon cutting to celebrate the

approximately one gallon of shrinkage

From a construction standpoint, shrinkage

completion of the bridge

reducing admixture was added per yard.

reducing admixtures will not substantially

BOTTOM LEFT: Construction on the

In addition, a midrange water reducer was

impact slump. However, increased set time

bridge at Barber Motorsports Park

added to the mix to further reduce water

of 1 -2 hours can be expected. Also, expect

content by 15%. The midrange reducer

much higher per yard cost on the project.

also made the pumping and finishing of the

Thirty five to Forty five dollars per yard would

concrete simpler.

not be uncommon.

From a design perspective, use of shrinkage

Like any complex concrete project, it is

reducing admixtures will significantly reduce

highly recommend a pre pour conference

dry shrinkage by up to 80% at 28 days

take place to insure the contractor,

and 50% at one year. The admixture will

engineer, and supplier are on the same

also reduce warpage due to curling of

page and have the same expectations.

the concrete. Other benefits of shrinkage reducing

admixtures

are

improved

“We designed the substructure frames


PROJECT SPOTLIGHT

based on the superstructure loads that we

superstructure was a major issue in the

The park, which opened in 2003, has a

received from the design-build contractor,

design.”

17-turn, 2.38-mile (3.83 km) road course,

and had to design for the weight of the

designed by Alan Wilson, viewable from

bridge as well as for the lateral wind and

This project follows last year’s new addition

several naturally wooded or grass-covered

seismic loadings, and had to design the

of the $4 million Barber Proving Grounds,

banks. This centerpiece of the park draws

foundations for these loads as well,” says

a new track area and wet/dry skidpad that

auto and motorcycle races, including an

Franklin.

can accommodate additional events at the

annual Indy race, as well as conventions

park while the existing track is in use.

and festivals throughout the year.

“Coordinating

these

loadings

and the support connections with the

FALL 2015 5


PROJECT SPOTLIGHT

Fun Facts about the Bridge • The bridge is 408 feet long, excluding patios, and is believed to be the longest continuous bridge of its type in Alabama. • The time required to construct the entire bridge was only four months. Construction

was

completed

for

Barber’s hosting of the 2015 Indy The track has hosted numerous motorsport

Grand Prix of Alabama

races including Grand-Am, Pirelli World

• The bridge is three stories above the

Challenge, Vintage Racing Series events,

racetrack.

AMA SuperBike and the Verizon IndyCar

• The longest free span of the bridge

Series. It serves as the home of the North

is 175 feet.

American Porsche Driving School, along

• Bridge structural design would allow

with various track day events. It is also

3,000 people to be on the bridge at

home to the newly-built “Barber Proving

one time, or vehicles up to 5 tons.

Grounds”, which includes a new track area

• Each of the long bridge sections

and wet/dry skidpad that will accommodate

weighs over 200,000 pounds.

additional events while the existing track is

• Concrete slab on the bridge weighs

in use. Mercedes-Benz USA is one of the

145 tons.

customers taking advtantage of the Proving

• The concrete flooring of the bridge

Grounds for its employees. Barber is

contains special polymers and fibers

noted for its landscaping and greenery; the

to prevent cracking from movement of

track has been referred to as “The August

the bridge.

National of Motorsports”.

• Occasional movement felt when walking on the bridge is expected and

This past spring, the finishing touches on

safe. The movement is a combination

the pedestrian bridge were completed, and

of wind, those walking on the bridge,

it was open just in time for the Honda Indy

and

Grand Prix of Alabama held late April.

underground – such as cars on the

movement

transferred

from

race track. This occurs because the Barber Motorsports Park annually draws

columns supporting the bridge are

more than 250,000 visitors from around the

anchored into bedrock over 20 feet

world to the Birmingham area, with more

underground

projects being planned for the future.

• The glass floor is actually 20% stronger than the concrete walking surface surrounding the glass.


AR CHI TE CT S P O T L I G H T

Scott Steen

M ONT G O M E RY b y w ay o f

NE W Y O R K

FALL 2015 7


A R C H ITE CT S P O T L I G H T

Very few young architects in the South

While living and working in New York,

can say they’ve designed projects in New

the issues of

York City, but Scott Steen is one of them.

introduced early in his career, and under

‘green building’ were

the guidance of Bob Fox and Richard Born and raised in Montgomery, Scott

Cook, principles of Cook Fox Architects,

graduated from Auburn University in

Scott acquired his LEED AP accreditation

1997 and moved to New York with his

and knowledge to design projects in a

wife, Heather, who is an interior designer.

responsible manner in regards to building

Fresh out of college and living in the

life cycle, impact on the environment, and

‘concrete jungle,’ Scott was hired by

energy efficiency.

Cook Fox Architects where he worked for eight years before moving back to

Scott’s passion is sustainable architecture

Alabama.

and the ‘urban experience,’ and he relies heavily on concrete for many of his

“As a kid who just liked to draw, I became

designs. During his time with Cook Fox,

enamored with the tools of the trade at

Scott worked on several notable projects

an early age, and I had a scaled down

including Historic Front Street, which is

TOP: AIDT Maritime Museum

version of a drawing desk by the time

a mixed-use neighborhood of 95 rental

BOTTOM LEFT: Historic Front Street

I was seven, and completed my first

apartments and small-scale, independent

Project in New York City

house plan shortly thereafter,” he says.

retailers. The project incorporated three

“Ever since then, it’s always been clear

new buildings into the empty lots among

to me what I wanted to pursue, and

11 original buildings, and demonstrated

after graduating from Auburn I’ve been

a commitment to modern environmental

practicing architecture ever since.”

stewardship.


AR CHI TE CT S P O T L I G H T

FALL 2015 9


A R C H ITE CT S P O T L I G H T

TOP: Exposed concrete exterior wall at

“Concrete is one of the few materials that

Emergency Operations Center.

Elmore County Emergency Operations

can be used for strength, permanence,

two-thirds of the building is a tornado

Almost

Center was designed to express strength.

and aesthetics simultaneously,” he says.

shelter enclosed by poured-in-place 12”

“It also lends itself to creating sculpted

thick concrete walls and 5” thick roof.

shapes more than any other material.”

The concrete wall has been left exposed in several exterior and interior locations

After he and Heather moved back home

in order to express the “strength” of the

in 2005, Scott accepted a job with

building.

Goodwyn Mills & Cawood where he worked until 2012, before joining 2WR.

“I choose to use concrete in certain

In 2015, he and a fellow colleague, Lee

designs

Sims (formerly of Barganier Davis Sims

capabilities,

Architects)

formed

studioScarab,

because

of

because

its of

structural its

readily

a

accessible nature, and for its familiarity

boutique design firm dedicated to high

to general contractors,” Scott says. “It

quality architecture, where he continues

has also proven to be especially useful

to practice today.

for tornado shelters that are becoming more commonplace in these commercial

He is still working on the completion of a

projects.”

couple projects for 2WR on a freelance basis,

including

the

Elmore

County

While with GMC, Scott was the design


AR CHI TE CT S P O T L I G H T

Get to Know Scott Steen What’s the last book you read? Treehousing:

The

Instructional

Guide by Tom Nelson from the TV show Treehouse Masters. What’s your favorite food? Cuban sandwich and grilled corn from Café Habana in New York City. What is an interesting fact that most people don’t know about you? I’ve never been a skater, but I’m completely fascinated by inground concrete skateparks; both architect for AIDT’s (Alabama Industrial

AIA Honor Ward and the 2010 AIA

for the sculptural quality of them

Development Training) Maritime Training

Alabama Design Award for the Maritime

and their precise execution. I would

Center in Mobile. This was a favorite

Training Center, as well as the 2008

love to design one for the city of

project using concrete, mainly for its

AIA National Housing Award for the

Montgomery.

aesthetic nod towards the wood planking

Front Street Project. He is a member

of an old ship expressed on the main

of the American Institute of Architects,

What are your hobbies? Collecting

entrance facade.

the USGBC Alabama State Board, the

robots and woodworking.

USGBC

Central

Branch

Leadership

Even though he can’t take any of the

Group and a former member of the

What is the one tool you can’t live

design credit, the Highline Park in New

Montgomery Museum of Fine Arts Junior

without? Sadly, I think I have to say

York City, serves as great inspiration

Executive Board.

my iPad. I use it constantly for work,

for how versatile concrete can be in

research, and play.

an urban setting. Its use of a concrete

“The

plank walkway system that morphs

architecture is that it allows you to

Are any other members of your

into everything from benches to water

visualize

intended

family architects? No, but my wife is

fountains

location,” he says. “Then watch it grow

an interior designer. It’s nice to be able

to occupy the space that used to be just

to discuss architectural issues with

empty sky.”

someone who understands the industry

is

a

powerful

idea

while

maintaining simplicity.

best a

thing project

about in

its

practicing

Scott has been recognized for several projects, including the 2011 Gulf States

FALL 2015 11


PROJECT SPOTLIGHT

T

herefore everyone who hears these words of mine and puts them into practice is like

A WISE MAN WHO BUILT HIS HOUSE ON THE ROCK. The rain came down, the streams rose, and the winds blew and beat against that house; yet it did not fall, because it had its foundation on the rock. - Matthew 7: 24-25


PROJECT SPOTLIGHT

I

n May of 1924 in Montgomery,

church grounds were located at 3017

under a tent on the corner of

Lower Wetumpka Road.

Lower

Wetumpka

Road

and

Pickett Street in the old cedar grove

In late 1984 the decision was made to

where Park Plaza Shopping Center now

sell the property at Lower Wetumpka

stands, Eastern Meadows Church of

Road in order to build at 4050 Fairground

Christ began meeting.

Road, about a half mile away. Following several months of meeting in the Faulkner

Until its first building was completed at

University Rotunda, the church, held her

100 Park Avenue in 1925, the church

fist service in the new building on July

met at the home of Mr. and Mrs. Fitzhugh

30, 1986. In 1992 seven new classrooms

Ferguson. Over the next several years, the

were added.

congregation grew and moved into a new two-story building in 1941, followed by an

The Fairgrounds Road property was sold

additional two-story classroom building

in 2006, and a property at 8460 Vaughn

that housed an office, nine classrooms,

Road was purchased. Again, Eastern

two bathrooms and a furnace that was

Meadows met at the Faulkner University

completed in 1957.

Rotunda while then new building was under construction.

And in November

Finally, the main auditorium was finished

2008 Eastern Meadows held its first

in 1960, and for the next 24 years the

service at the Vaughn Road location.

FALL 2015 13


PROJECT SPOTLIGHT

Just last year, construction began for

steeple on the original building remaining.

the new auditorium at the Vaughn Road location with plans to have it completed

“The design is very heavy, and wanted

fall 2015.

a solid building with concrete, CMU exterior walls and steel,” says Black.

“The project took three months to design

“The design concept of the building was

and twelve months to construct,” says

actually created years ago when we

Lance Black, architect, with Black Design

designed the first phase building, and we

Architecture. “We did a phase one

wanted everything to blend together as if

building that served as a Sanctuary with

it had been built at one time. The overall

classrooms and the phase two building,

design incorporates high ceilings and lots

now under construction, is the church’s

of natural light.”

permanent Sanctuary. The phase one building is now being converted to a

Due to soil conditions, concrete piers for

Fellowship Hall with commercial kitchen

the foundation were used on both the

and still retaining the classrooms.”

phase one and two buildings.

The original building was designed to

“Concrete was the only way to go,” says

transform over time into the Fellowship

Black. “It performed perfectly.”

Hall. The unique feature of the current building under construction is a large

The church is scheduled to open in

steeple tower that highlights the main

September.

entrance. Eventually, when phase 3 is built, there will be three steeples, with the


PROJECT SPOTLIGHT

P

ROJECT OVERVIEW OF VAUGHN FOREST CHURCH OF CHRIST

Project Budget: $14,000,000 Square Feet: 75,000 Worship Seating Capacity: 1,600

C

huck Jones, formerly of Godwin Jones Architecture & Design in Montgomery was the lead

architect for Vaughn Forest Church of Christ, located at 3800 Vaughn Road. The design process took eight months, with construction lasting one year. The church was completed in 2008, with Phase III being the completion of the current and future worship facility. Jones, now with Goodwyn Mills and Cawood, discusses the use of concrete in the design. What are some unique features incorporated into the design of the building?

can

Unique features include an expandable

concentric rings while using the same

concept. The building seating capacity

stage and stage equipment. There is great

grow

outward

and

upward

in

expense in the stage and audiovisual and allowing the seating to grow while saving the performance area will be very cost effective over the life of the church. How did you go about creating the design for the building? The design was worked out through much

prayer

and

coordination

with

the Staff and congregation. Several strategies

were

explored

including

stand alone additions, smaller venues

FALL 2015 15


PROJECT SPOTLIGHT

that would have to be repurposed later as new larger venues were built and finally the current plan which allows for uninterrupted expansion. Why did you choose to use concrete in certain areas of the building? We used concrete tilt-up panels because at the time the building was being designed, this type of system was more cost effective than structural steel and stud wall systems. The schedule was also enhanced by the speed of construction the tilt-up systems afforded. What are some components of concrete that make it a good product for this architectural structure? Tilt-up construction gave us the ability to create the entire wall system and building envelope as well as the structural support for steel roof joists thus saving the crossover of several major trades. What is your favorite design aspect of the building? The large concentric lobby allows for easy flow in and out after events and the use of large windows on the north elevation of the sanctuary fills the room with pleasing natural light and black out shades allow these windows to be mechanically cover when ark conditions are required during performances.


F E AT U R E

On a beautiful Saturday in April, some of the state and industry’s best concrete truck

drivers

gathered

at

Talladega

SuperSpeedway to compete in the Alabama Concrete Association’s 2015 Truck Driver Championship, commonly known as the “Truckin’ Rodeo.” The annual event is held each spring, and the drivers are encouraged to bring their family members and friends to cheer them on. The rodeo gives the drivers an opportunity to show-off their skills with a chance to win a cash prize and an all-expenses paid trip to compete in the national competition in

TALLADEGA,

AL

San Antonio in August.

FALL 2015 17


F E AT U R E

This

year,

33

drivers

from

member

came out to support their favorite drivers,

companies including Ready Mix USA,

and the kids enjoyed video games, face

Webb Concrete, Sherman International,

painting and Big Sam the Balloon Man!

Kirkpatrick Concrete, Gulf States Ready TOP: Drivers get ready to start the

Mix, Reed Ready Mix, and Bama Concrete

As always, these events wouldn’t be

participated in the contest.

possible without the help of our generous

competion

sponsors. A special thanks to Beck

LEFT: John Sorrell with Jody Johnson

To further challenge the drivers a written

Industrial,

RIGHT: Winners pose after competion

test had to be completed before the driving

Nextran, Ready Mix USA, Thompson

portion, which included various obstacles

Tractor and Truckworx.

and maneuvers, began. To keep things fair, Alabama State Troopers judged the event. More than 125 family members and friends

Lehigh

Cement,

McNeilus,


F E AT U R E

Truck Driver Championship Participants

Gaylon Lovelace Shannon Mattox Jeremy Johnson Ashley Gassaway

BAMA CONCRETE

Timothy Ray

Robert Slaughter

Melvin Kennamer

Toney Riley Lee Cook

SHERMAN INDUSTRIES

Addison Nelson

Buddy Batson -3rd Place Winner*

Clifford Richey

Kenneth Edwards Tony Peoples

GULF STATES READY MIX

Billy Keith

Joe Norman-2nd Place Winner*

Kerwin Looney

Isaac Johnson WEBB CONCRETE KIRKPATRICK CONCRETE

Brian Newton

Sean Mattox

Tim Bryant

James Adams Kevin Box

COMPLETE LIST OF WINNERS:

Rex Keeling

Two highest scores from

Jason Murphy

a company – Jody Johnson and

James Sanders

Gaylon Lovelace

William Flippo

Front Stop Challenge – 100 –

Donald Brasher

Jeremy Johnson – Ready Mix USA

Maurice Carr

Parallel Park Challenge – 100 – Brian Newton – Webb Concrete

REED READY MIX

Back Stop Challenge – 100 – Toney

David Bradford

Riley – Bama Concrete

Mark Howren

Highest Written Score – 100 – Mark Howren – Reed Ready Mix

READY MIX USA

Team Competition Winner – Ready

Jody Johnson-WINNER*

Mix USA

FALL 2015 19


T echnical R E V I E W

e t e r c n o C Cracking A n o t h e r Lo o k at

Bill Goodloe T e c h n i c al S e r v i c e s M a n a g e r - CE M E X

We

in

Typical concrete, by its very nature, shrinks

very practical to use aggregate larger than a

concrete technology over the last twenty

have

made

as it sets up and cures. Constraints to

size #67 or # 57,but you should avoid using

to thirty years. Plants have become

movement of the concrete result in the

anything smaller in size, unless required for

computerized,

have

development of tensile stresses and when

an application such as a topping mixture.

self-consolidating

those stresses exceed the ability of the

Finishers will likely complain if there is too

concrete,

high-

concrete to resist them, cracks form. Drying

much coarse aggregate in the mixture.

performance concrete, and the list goes

shrinkage cracks in flatwork are probably

The maximum volume of coarse aggregate

on. But with all of our improvements,

the most common cracks we have to deal

that can be used while still maintaining

there are still some basic concrete issues

with, so let’s focus on this particular type

workability should be determined by trial

that never seem to go away. One of

of cracking.

and error. . Fine aggregate gradation is also

improved,we concrete,

many

advances

communications have

pervious

these, of course, is cracking concrete.

very important in keeping the water content

You would think after all these years’ that

The first step in controlling cracks is to

to a minimum. If the sand is excessively

engineers, contractors, and finishers (and

reduce the potential for cracking by using

fine or gap graded, the amount of water

ready mix producers) would have this one

the right concrete mixture design. One of

required for a given slump will increase.

figured out. Unfortunately, this is still one

the most important factors is to reduce the

Sand gradations should be watched closely.

of our most common issues, so it never

amount of water in the mixture. Increasing

Normal water reducers, mid-range water

hurts to take another look at the basics of

the size and volume of the coarse aggregate

reducers, or super plasticizers should be

preventing or controlling concrete cracks.

will minimize the amount of water needed

used to maintain the lowest possible water

for a given concrete slump. It is generally not

content and provide a workable mixture.

AUBURN UNIVERSITY RAPTOR CENTER | AUBURN, AL


T echnical R E V I E W

The use of calcium chloride accelerators

brick) section and create restraint.

is known to increase shrinkage. If its use is

this as possible. Thicker concrete can be spaced further apart. The configuration of

necessary, the dosage should be kept to a

Control joints are installed in concrete to

the flatwork may require special attention

maximum of 2% of the cementitious content

cause the cracks to occur where you want

when planning the control joint layout.

by weight.

them to and to be aesthetically appealing.

Inside, or reentrant,corners always need to

Control joints can be installed prior to placing

have control joints coming off the corners

Subgrade preparation is also very critical

the concrete by using wood, or metal strips,

in both directions. Columns located within

in preventing or reducing the potential for

or some other preformed jointing material.

a floor slab should have isolation joints

cracking. A slab, driveway, or sidewalk

Typically, however, control joints are installed

around them and the slab should have joints

should only be placed on soil or granular

in flatwork after it has been placed by

designed to avoid uncontrolled cracks at

fill that is well compacted, and level. If the

utilizing saw cuts or tooling. The depth of the

the corners. Driveways with curves in them

subgrade is irregular, withlow spots and high

joint should be at least . the thickness of the

will require special consideration.

spots, it will create additional restraint on

concrete. When saw cutting, it is critical that

the movement of the concrete as it shrinks

joints be cut as soon as the concrete has

Concrete

and increase tensile stresses. Polyethylene

hardened enough to prevent the aggregates

in

is typically placed underneath a slab as a

from being dislodged. Early entry saws are

configurations. The control joint pattern

vapor retarder. This makes the use of a low

also available which can cut joints shortly

should always be carefully planned before

water-cement ratio concrete even more

after final finishing is complete. In tooling, it

construction ever begins. This statement

important because excess mixture water

seems to be a common problem that joints

applies to both commercial and residential

can only escape to the surface as bleed

are not deep enough. The finishers have to

construction. The finishers or saw cutting

water. Some contractors have placed a

make sure that they are using jointing tools

crew should not be the ones to decide

compacted layer of fine aggregate over the

of the proper depth, and when they are

where the control joints go and how far to

vapor retarder to allow the concrete to drain

worn down they should be discarded.

place them apart.

concrete shrinkage as well as improve the

Concrete flatwork should have a joint

To summarize controlling cracks in concrete

set-time.

pattern that should create panels that are

flatwork, remember:

flatwork

countless

sizes,

may

be

designed

thicknesses,

and

out of the bottom. This will decrease the

relatively square. If the length to width ratio When forms are being set up for flatwork,

exceeds approximately 10 to 1, then the

any items that would restrain the concrete

panel is likely to crack in between the joints.

from moving should have isolation joints

Think about a dried up mud puddle; have

placed around them. This would include

you ever noticed how it ends up in small,

columns, poles, utility and plumbing pipes,

almost square sections after it has dried

·A  void sands that are too fine or gap graded

etc. Isolation joints(often called expansion

out? Concrete seeks to crack into square

· Properly prepare the subgrade

joints) allow flatwork to be separated from

patterns. How often have you seen 12 foot

· Use isolation joints

the more rigid parts of the structure and will

wide driveways with control joints 20 feet

· Properly space control joints

accommodate movement of the concrete.

apart that have a crack in between the

· Cut or tool control joints . depth of concrete

It is common to see a column or pole

joints?

·P  ay close attention to the flatwork

protruding from a slab without the use of an

· Use a low water-cement ratio concrete mixture · Maximize coarse aggregate size and volume

configuration

isolation joint and it has a crack coming off

The width between control joints should be

of it. Isolation joints should also be placed

about 30 times the thickness of the concrete.

between a slab and wall, such as in a

For a 4 inch thick slab or driveway, this

basement, or where the driveway meets a

means control joints should be 120 inches,

slab or a retaining wall. If an isolation joint

or 10 feet, apart. It may be hard to convince

is not at these locations, the concrete will

a contractor or owner to place the joints this

likely bond to the other concrete (or block or

close, but they should be kept as near to

· Always carefully plan control joint pattern prior to construction

FALL 2015 21


CONCRETE NEWS

Concrete News

SUMMER 2015 ALDOT LIASON MEETING RECAP On June 11th, representatives of the association’s liaison committee met with Materials and Tests Engineer Scott George, P.E. and the concrete engineer Drew Waldrop, P.E. The purpose of the liaison committee is to discuss problems affecting the concrete industry when providing ready mix on a state job. Topics discussed included use of manufactured sand, C 595 cement, shrinkage

testing

requirements,

and

addition of water at the job site. The

ACIA sponsors ua’s asce regional concrete conoe competition The ACIA is proud to have served as the primary sponsor for the University of Alabama’s American Society of Civil

Vulcan.

concrete

department

competition, students from the university

In

addition

to

the

surrounding

competed in a cylinder breaking program

manufactured sand before approval in

and concrete ladder golf competition.

Alabama.

SUCCESSFUL PARKING LOT SEMINAR HELD IN MAY

Engineers (ASCE) student chapter at this

is

currently

states

researching

acceptance

of

In respect to C595 cement, ALDOT is working to find a test project to research its effectiveness. On the issue of shrinkage testing, the state is in the process of

year’s regional concrete canoe competition.

The association held a two-hour concrete

modifying

its

specification

to

require

The association’s sponsorship allowed

parking lot design seminar for 50 architects

rounding of shrinkage results to the nearest

the 11 person team to travel to the ASCE

and engineers in Birmingham on May 11.

100th. Therefore, shrinkage results must

Southeast Region Competition March 19 –

Amy Miller of the NRMCA served as the

be .04 or less. Finally, the committee

21, 2015. At the March event, the UA team

instructor for the program. Miller’s program

discussed the need for the industry to

competed with 27 other universities from

included an in-depth review of ACI 330-

add water using an inline water meter

the southeast and Puerto Rico. After all of

08 and a review of designing concrete

versus the industry standard sight gauge.

the scores were added up, the University of

overlays on existing asphalt parking lots.

Removal of the in line water meter would

Alabama team finished 9th. The concrete

Attendees received a joint layout guide

save the industry between $200 to $500

canoe completion includes both a racing

and CPA cost analysis software. The ACIA

per truck per year.

and presentation portion. Pictured are

will hold a similar program in Mobile and

the UA presentation of their boat named

Huntsville before the end of the year.


L egislative R E C A P

L e g i s l a t i v e recap Association Helps Secure Additional Driving Hours for Truck Drivers

Additional Driving Hours for Truck Drivers starting September 2015

Increased HOS

Existing HOS

Hours on Clock

15

14

Driving Hours

12

11

During the 2015 Legislative Session, the

Hours on Clock Per Week

70 in 7 days

60 hours in 7 days or

association was successful in helping

70 hours in 8 days

pass House Bill 298 which will increase

Off the Clock Time

10 Hours after 15

10 hours after 14

the number of hours a commercial driver

Log Books

Required

Required

can drive when intrastate and hours on

Radius from Plant

75 miles

Not Applicable

the clock per week. The new law forced the state to adopt the intrastate variance recognized by the FMSCA. The new law does not overwrite existing options, but only adds a third option should the company need extra hours for their drivers

Additional requirements if new rule is followed;

when intrastate. For ease of explanation,

safety ratings are prohibited from using this exemption. 2) Intrastate Variance will be based on

listed below is a comparison of the new

1) All motor carries operating under this

previous seven days, therefore driver

HOS intrastate variance versus existing

variance as set for in this act must have

must have log book for previous 7 days if

regulations. Some companies will continue

a “satisfactory” safety rating with FMSCA,

checked for enforcement.

to operate under the 100 air mile rule which

or be “unrated”.

will not be affected by the new law.

“conditional” or “unsatisfactory” FMSCA

Motor carriers with

FALL 2015 23


2015 CALENDAR

MARK IT

DOWN

2015 Sept.

21 birmingham, al

BUTCH WYATT CONCRETE CUP

The Alabama Concrete Industries Association will host its 5th Annual Butch Wyatt Concrete Cup, which is held each year in appreciation for architects and engineers who are proponents of designing with concrete products. The event will take place at Inverness Country Club in Birmingham on Monday, September 21.

oct.

20-21

A DAY OF CONCRETE KNOWLEDGE

BIRMINGHAM/ Montgomery, al

The Alabama Concrete Industries Association will host “A Day of Concrete Knowledge,� which is an annual program designed to provide valuable education programs on concrete and masonry concrete topics in October. All architects, engineers, inspectors, contractors and concrete industry personnel who will receive 8 hours of HSW approved education credits. The seminars will take place in Birmingham on Tuesday, Oct. 20 and Montgomery on Wednesday, Oct. 21. Ready Mix Topics to be Covered: Evolution of Concrete Mixes, What the Future Holds for Concrete Technology, Concrete Design Using Fibers, Solutions to Concrete Cracking Problems, Designing Parking Areas using ACI Standards Masonry Topics to be Covered: ICC Changes and the Impact on Concrete Masonry (2 hrs), Low Impact Design using Concrete Pavers


Thank You Alabama Concrete Industries

...for allowing us to serve you for 37 years and counting!

FALL 2015 3


PRSRT STD U.S. POSTAGE

PAID

MONTGOMERY, AL PERMIT NO. 456

1745 Platt Place Montgomery, AL 36117 www.alconcrete.org 334.265.0501

ACIA 5th Annual

Butch Wyatt Concrete Cup Invitational

Monday, September 28, 2015

Inverness Country Club - 1 Country Club Drive - Birmingham, AL 11am Registration & Lunch - 12pm Tee Time 4:30pm Prizes, Drinks and Hors D’oeuvres Please RSVP your name, company, handicap and shirt size to Rebecca (rlindsay@alconcrete.org) *Limited to first 72 REGISTRANTS

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