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Georgia Chapter ACI, Newsletter
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Summer Newsletter

July 2015: Issue 5


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Upcoming Events


Thursday, August 5, 2015
Skipper Seminar
Special Inspections for Precast Concrete Structure
Charles Wynings, PE
Holiday Inn & Suites Atlanta Airport North

Saturday, August 8, 2015
ACI Field Tech Grade I Training
TEC Services, Inc.
Lawrenceville, GA
8:00 am - 12:30 pm

Saturday, August 15, 2015
ACI Field Tech, Grade I Certification Exam
TEC Services, Inc.
Lawrenceville, GA
7:45 am — 2:00 pm

Saturday, August 29, 2015
ACI Masonry Field & Lab Tech Certification Exams
S&ME Laboratory
Duluth, GA
8:00 am - 2:00 pm

Saturday, September 5, 2015
ACI Field Tech Grade I Training
TEC Services, Inc.
Lawrenceville, GA
8:00 am - 12:30 pm

Saturday, September 12, 2015
ACI Field Tech, Grade I Certification Exam
Lehigh SE Concrete Lab
Doraville, GA
7:45 am — 2:00 pm

Wednesday-Friday, September 16-18, 2015
ACI Concrete Inspector Exam Training
GA Chapter Office Conference Room
Atlanta, GA
8:00 to 5:00 on W & Th, 8:00 to 12:00 on Friday

Saturday, September 19, 2015
ACI Flatwork Finisher, Training & Exam
Argos Ready Mix Concrete Lab
Cumming, GA
7:45 am — 2:00 pm

Saturday, September 19, 2015
ACI Aggregate, Strength & Lab Tech, Training
TEC Service, Inc.
Lawrenceville, GA
8:00 am — 2:00 pm

Friday, September, 25, 2015
GA Chapter ACI Lunch Meeting
Recent Research using Metokaolin in Concrete
Dr. Kimberly Kurtis, F.ACI, F.ACerS
Crowne Plaza Hotel, Atlanta Perimeter Ravinia
11:30 am Registration
12:00-1:30 pm Lunch Meeting


Saturday, September 26, 2015
ACI Field Tech, Grade I Certification Exam
ECS Southeast Regional Office
Savannah, GA
7:45 am — 2:00 pm

Saturday, October 3, 2015
ACI Field Tech Grade I Training
TEC Services, Inc.
Lawrenceville, GA
8:00 am - 12:30 pm

Saturday, October 3, 2015
ACI Concrete Inspector Exam
GA Chapter Office Conference Room
Atlanta, GA
7:30 am to 1:00 pm

Saturday, October 10, 2015
ACI Field Tech, Grade I Certification Exam
Ready Mix USA Concrete Lab
Woodstock, GA
7:45 am — 2:00 pm

Saturday, October 17, 2015
ACI Aggregate, Strength & Lab Tech Exams
TEC Services, Inc.
Lawrenceville, GA
8:00 am – 4:00 pm

Friday, October 23, 2015
GA Chapter ACI Lunch Meeting
Crowne Plaza Hotel, Atlanta Perimeter Ravinia
11:30 am Registration
12:00-1:30 pm Lunch Meeting
Information & Registration at:
www.aci-ga.org

 

2014 Georgia Chapter Officers:

President:
Angela San Martin, P.E. 
Metromont

Vice President:
Wilbur Bragg II, P.E., CDT
T.Y. Lin International

Secretary:
Elizabeth Harwood
GRMCA

Treasurer:
Ralph Hodgins
Retired

Board of Directors:

Kelly Roberts, P.E., LEED AP
Walter P. Moore

Gary Knight
Lehigh Cement

Tom Pfeifer, P.E.
Uzun & Case Engineers

Rick Tilson
Argos Ready Mix

Justin Lazenby
Thomas Concrete

 

Immediate Past President
Vance Robinson
ReadyMix USA

President's Message 

It is hot outside and so is the concrete industry. 

I hope everyone has had a wonderful summer. I honestly can’t believe it is over, but I’ll be happy to start up our luncheons again very soon.
Last meeting, we had a discussion on understanding and specifying CLSM – controlled low strength material – also known as “flowable-fill”. I was not able to attend but I know it was a great presentation.

Looking ahead, on August 5th we have our annual Skipper Seminar. It will be on Special Inspections of Precast Concrete so please be sure to attend. In September, we have Dr. Kimberly Kurtis with Georgia Tech speaking to us about her concrete research using Metakaolin.

With the end of summer we will be electing new officers for our KSU student chapter. I’m excited to get the student chapter up and running again. If anyone wants to sponsor a student at a luncheon or is in need of interns/new hires let me know. The students at KSU are great and hopefully will be attending our fall luncheons so you can meet them. 

Obviously if you are receiving this newsletter you are a current member. We thank you for being a part of our group. Please spread the word to your colleagues about becoming members. Our chapter can only get better through active participation, so let’s get involved. 

I hope everyone has a great month and I can’t wait to see you at the Skipper Seminar on August 5th or our Fall Luncheon on September 25th!


Angela San Martin - GA Chapter ACI President

Skipper Seminar

The 2015 Skipper Seminar will cover Special Inspection of Precast Structures. For more details and to register, visit our website. 

Date: Wednesday, August 5th

Location: Holiday Inn & Suites Atlanta Airport North
1380 Virginia Ave,
Atlanta, GA 30344

Cost: $45

Registration: 8:00 – 8:30 a.m.

Seminar: 8:30 a.m.-- 12:30 p.m..*
*Lunch provided

 

Adhesive Anchor Certification Available

Ga ACI offers the Adhesive Anchor certification program as part of our certification series. This program includes both written and practical examinations that the installer must take and pass for certification. The practical part of the program requires proper demonstration of vertical down and overhead installation procedures. The overhead portion requires knowledge related to “piston-plug” and “retaining-cap” systems. 

The Adhesive Anchor Certification has become more prevalent as more local communities adopt the 2012 IBC, which includes ACI 318-11 and requires ACI/CRSI certified personnel for the installation of adhesive anchors in a horizontal or overhead orientation, where a sustained tensile load is apparent.

For more information on this certification, and other programs offered by our chapter, please visit our website
 

 

May Meeting Recap

We had a boisterous crowd on hand for our May Lunch Meeting.  All were entertained by GRACE Regional Technical Services Manager, Jason Wimberly who gave us a presentation on Controlled Low Strength Material (CLSM), The Material, The Myth and The Legend.  Jason laid out an agenda that covered some basics on what CLSM is and some history on where it originated, some of the engineering properties, both plastic and hardened; and some applications, features and benefits.

ACI Document 229R Controlled Low-Strength Material defines CLSM as; “a self-consolidating cementitious material used primarily as a backfill as an alternative to compacted fill”.  Some notable points from ACI 229R include: intended compressive strengths are 1200 psi or less, most applications require 300 psi or less and hand excavatable material should be less than 100 psi.  Low density CLSM is preferred when reduced dead loads are critical and is typically 20 to 120 pcf.  One of the biggest myths about CLSM is that it is a low strength concrete; CLSM is not concrete and should not be specified as such.  Most of the ASTM Standards that govern CLSM are D designation standards (soil) and not C designation standards (concrete).  CLSM has been around since the early 1970’s as a replacement for poorly compacted soil, first produced primarily with cement, fly ash, sand & water.  Today, approximately 10 million cubic yards are placed annually with most applications requiring future excavation (100 psi strength or less).

The primary plastic property is flowability.  CLSM must be self-leveling and self-compacting without material segregation or subsidence (hardened volume change due to water displacement, generally less than 1/8 inch per foot of depth).  Hardening time, length of time required to support the weight of a person, is dependent on the CLSM constitute materials and is generally between 1 and 5 hours.  Some typical hardened properties include:

•    Density: 115 to 145 pcf, 90 to 100 pcf with AEA & 20 to 120 pcf for LD-CLSM
•    Excavatable: by Hand less than 100 psi, by machine less than 300 psi, or non-excavatable greater than 300 psi.
•    Settlement: CLSM should not settle like compacted fill
•    Shrinkage: what can be thought of as normal concrete shrinkage does not affect CLSM performance
•    Corrosion Potential: can be measured using the same electrical resistivity methods commonly used for evaluating soil
•    Thermal: insulation and conductivity, conventional CLSM is generally not a good insulator, LD-CLSM with high air contents may exhibit good insulating properties
•    Permeability: similar to compacted granular fills, typically in the 10-4 to 10-5 cm/sec range

Jason closed with some typical mix design examples, common applications and a few case studies; his complete presentation is attached here. Vice-President, Wilbur Bragg, closed the meeting by thanking everyone for their attendance, wishing them a safe and happy summer break and making the GA Chapter Speaker’s travel mug presentation.

 

This Month in Concrete International...

Reprinted from the July 2015 issue of Concrete International with permission from American Concrete Institute (www.concrete.org)

  
At the ACI Concrete Convention and Exposition – Spring 2015 in Kansas City, MO, several interesting and unique artifacts were displayed with accompanying short descriptions during the technical session on "Artifacts for Better Presentations." The purpose of the session was to help inspire those who might want to enhance their presentations or lectures with historical items and/or unique objects. The article describes and presents photos of seven of these artifacts together with the presenters’ contact information.
 

September Meeting 9/25/15


Join us for the September Luncheon on the 25th. Dr. Kurtis from Georgia Tech will be presenting on Metakaolin. Click here to register today!
Copyright © 2015 Georgia Chapter ACI, All rights reserved.


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