ACI May Newsletter Print

President's Report

It’s May already, we are almost halfway through 2017, man how time flies…  19 years ago on May 1, 1998 my daughter Toby Marie Wilson was born, seems like yesterday we were standing in the kitchen of our home in Douglasville; both locked in a Mexican standoff over her refusal to eat some green beans.  Hate to say it but she usually won those stand offs, the most stubborn child I ever met! Turns out that stubborn Taurus-like attitude of hers has served her well, she has just completed her first year of school at the College of Charleston, on the honor roll, where she is studying to be an Archeologist.  Makes a father very proud :)

Concrete work here in Georgia continues to be looking strong even with two major projects (Brave’s & Falcon’s Stadiums) winding down. ACI Certification activity is very strong as it seems we have 50+ examinees every month signing up for new and re-certification exams. Life is good!

For our members that may not know, ACI Certification is where the money comes from to support our GA Chapter. We make a small profit on every exam after covering the Examiner, ACI International Exam, ACI Workbooks, Laboratory and UPS Shipping charges for each exam. This money helps to cover our Lunch Meeting cost shortfall, our web site maintenance fees, our phone, office rent & support fees, scholarship payments, etc. etc. Without ACI Certification and the money it brings into our Chapter we would be in pretty bad shape.

Forgot to mention last month that Rob Weilacher has volunteered to take over the duties of GA Chapter ACI Newsletter Editor from me, THANK YOU ROB! His first issue was last month, hope you all had a chance to read his first edition and noticed the new Outside the Cylinder feature. Last month’s article was on the WWII Concrete Ships, good stuff Rob. Can’t wait to see what Rob comes up with this month.

Remember our May Meeting comes a week early this month because of the upcoming Memorial Day weekend. Robert Howell, Engineer with ACI International, will be giving us a presentation on Mass Concrete.  Look forward to seeing you all at the Westin on May 19.

Take care and be safe out there,

Wayne M. Wilson, PE
Georgia Chapter ACI, President

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Luncheon Recap

We had our third lunch meeting of 2017 this year at the Westin Atlanta Perimeter North hotel, which is now our regular haunt. We had a good group of people in attendance and the speaker, Rick Galloway, gave a great presentation. Click here to view the presentation.

Our speaker, Rick Galloway, is the Vice President of Martin Concrete. Martin Concrete is a recognized leader in tilt-up construction and has been in business for 26 years. Rick presented a terrific overview of tilt-up construction and the various aspects of design and construction. The presentation started with a brief introduction to Martin Concrete and a discussion of what tilt-up construction consists of.

Tilt-up construction is not confined to light retail, warehouses, manufacturing and the like. For some time, Class A office buildings, institutional, aviation, movie studios and the like have been constructed with tilt-up methods. In addition, tilt-up is going 7 stories or perhaps more in height. Rick showed several unusual examples though his presentation of the wide variety that has been built.

The presentation went into details of formwork, the use of bond breakers, architectural features and the reinforcing. Inserts for lifting, embed plates and concrete composition were reviewed as well as insulated panels.

The methods of lifting, guiding, panel size/weight, and erection braces were discussed and finally some additional reading was suggested.

In closing, 2017 Vice President Tom Pfeiffer presented Rick the GA Chapter Travel Mug and thanked everyone for their attendance. There were several good questions at the end and Rick stayed for some time entertaining further discussion with group members that wanted to explore more information and ideas.

Upcoming luncheon dates for the rest of the year are below: 

  • May 19
  • September 22
  • October 27
  • November 17
  • December 15

 

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Our Next Event


Be sure and join us on May 19, 2017 for a presentation by Robert Howell on Mass Concrete.

Robert Howell
Professional Development Program Engineer
ACI National

 Program: Mass Concrete: How Big is Big?

What is mass concrete? ACI 207.1R defines mass concrete as any volume of concrete with dimensions large enough to require that measures be taken to cope with the generation of heat from hydration of the cement and attendant volume change to minimize cracking. But how does one predict whether mass concrete problems will occur and what steps should be taken? This presentation will discuss how to identify mass concrete, ACI 301 requirements pertaining to it, and good construction practices. Topics covered in this presentation will include: 

• Examples of mass concrete structures 
• Identifying mass concrete in the field 
• Specification requirements 
• Factors influencing mass concrete 
• Mitigation or design 

Speaker: Robert Howell, ACI Professional Development Program Engineer 

Robert Howell, joined ACI as Professional Development Program Engineer in 2014. Previously he was a Lead Structural Engineer at IBI Group/ Giffels LLC formerly Giffels Associates, Inc. Howell has 26 years of structural design experience in health care, industrial, research, power plant, educational, and commercial facilities. He also has 7 years of experience as an Owner’s Representative Project Structural Engineer with GM Worldwide Facilities Group. Howell received his BS in civil engineering from Wayne State University and his MBA in supply chain management from Michigan State University. Howell is a licensed professional engineer in the state of Michigan and is a LEED Green Associate. 

Email: Robert.Howell@concrete.org 
Office: 248.848.3833
Mobile: 586-588-4639 

Click here to register!

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Concrete International Magazine Article

This month in Concrete International…..

Reprinted from the April, 2017 (V. 39 No. 4) issue of Concrete International with permission from American Concrete Institute (www.concrete.org)

Successful Design of Wet-Mix Shotcrete

After last month’s ACI Structural Journal article, I decided to go for something much lighter from the Concrete International Magazine.  The articles in Concrete International contain information fairly easy to understand articles appropriate to the entire concrete community.

Shotcrete was introduced in back in 1910 by Carl Akeley to the construction community.  With a great amount of advances since then, shotcrete can provide performance similar to concrete for a lower cost.  More widespread use of shotcrete, according to the article, has not reached it’s potential because of misconceptions about it’s use.  This article explores five misconceptions as to it’s use.

Click Here to View the Full Article. 

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Outside the Cylinder

“Opus Caementicium”  

So, last time we went back 75 to 100 years to talk about concrete ships.  This time we are going back a bit more than 2,000 years ago to discuss Roman Concrete (Opus Caementicium in Latin).

Previous to the Romans, mortar was used in construction by the Greeks and Chinese (with the inclusion of sticky rice…seriously, and perhaps a future article), but the Romans appeared to be the first to use the mortar with large aggregate - brick and volcanic rocks (tuff) to produce concrete.  Initially, this volcanic ash for the mortar was harvested from wherever it was available (see photo of concrete cross-section).

Around 30 B.C., Octavian Caesar (renamed Augustus in 27 B.C.), after the Second Roman Civil War (Marcus Antonius, Cleopatra, the asp, Elizabeth Taylor, and all that) began a public building program that was larger in scale than anything Rome had seen before.  It was around this time that Roman concrete began to be standardized by primarily using the volcanic Pozzolane Rose deposit ash from the Alban Hills, about 12 miles from Rome.  Marcus Vitruvius, a Roman engineer working for Octavian, described the concrete as three parts volcanic ash, 1 part lime, water, and fist sized chunks of bricks and volcanic rocks (see photo of Pantheon roof).

So what makes Roman concrete special? It is MUCH weaker than modern concrete, but the real special thing about it is durability.  Roman concrete structures have exhibited very little decay for being 2,000 years old.  According to a UC Berkeley study, the secret is a collection of minerals in the mix which form calcium aluminum silicate hydrate (CASH) which binds materials to create highly durable concrete. This is also known as an Aluminum Substituted Tobermorite.  Even in saltwater, Roman concrete has aged very well.

The Romans never used reinforcing for tension in their concrete, so most often they used vaults, arches, and domes to shape their structures.  Concrete, in ancient times, was easier to construct than masonry and much safer than wood (from fire, which was a constant threat – ask Nero – the Romans blamed him for the fire in 64 A.D. that swept through Rome).

Later, Pliny the Elder (A.D. 23-79), a Roman philosopher, said the best maritime concrete was made with volcanic ash from the region of the Gulf of Naples.  Unfortunately, and ironically, Pliny was to be entombed in volcanic ash from the eruption of Mount Vesuvius in 79 A.D., which, like Pliny, also happened to reside along the Gulf of Naples.

Roman volcanic ash was often shipped abroad to make harbors in Turkey, Egypt, Israel, and elsewhere.  With the fall of Rome (A.D. 476) concrete was seldom used during the Medieval Ages and the knowledge was essentially lost.

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Certification Announcement

Tilt-Up Technician & Supervisor Exam

Date & Location:
Saturday, June 24, 2017
Argos Ready Mix SE Concrete Lab
1511 Ronald Reagan Blvd.
Cumming, GA 30041

Exam Review Workshop ($250): 7:30 am – 11:45 am
Exam Review Workshop is given in English and includes an ACI Workbook ($150 value). For the workshop bring your ACI Workbook, highlighter and maybe something for a light lunch, as the exam will begin shortly after the workshop. For the Exam be sure and bring a picture ID, a simple function calculator and at least two #2 pencils.

Exam Only ($250): 12:00 pm – 2:00 pm
If you signed up for the exam only (i.e. no workshop), registration begins promptly at 11:45 am with the exam beginning shortly thereafter. Be sure to bring a picture ID, a simple function calculator and at least two #2 pencils for the exam.

Visit the GA Chapter ACI web site (www.aci-ga.org) for additional information and/or registration. If you need to cancel or re-schedule an existing registration it must be done a minimum of 5 days before the exam date by emailing Wayne Wilson at (wayne.wilson@lafargeholcim.com). There is a $100 charge if you are registered and do not show up for the exam. Examiner contact information on the day of the exam is Cecil Bentley @ (770) 480-7440.

Click here for more information.

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Scholarship Clay Shoot

Save the Date!

Location:
Etowah Valley Sporting Clays
619 Sporting Hill Drive
Dawsonville, GA 30534

Date:
Friday, November 10, 2017

We are excited to announce that we will be returning to Etowah Valley Sporting Clays on Friday, November 10, 2017 for our annual scholarship fund clay shoot. Registration is now open on the website. Reserve your spot before they are all taken! 

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ACI Awards

 

Submit YOUR Project for next year! 

You can now upload project materials throughout the year in your own private folder through Google Drive! Simply contact ngroome@gaconcrete.org and she will create & share a folder with you where you can compile all your submission materials as you go. 

This will make it easy to organize everything throughout the year as you prepare for your submission.

Click Here for Google Drive Submission Instructions.

2017 Project Submission Form.

The ACI Awards Program is your chance to show off your organization's expertise and ingenuity. ACI Award winners are recognized as industry leaders invested in advancing the design and construction of concrete structures. 
 
Submitting your project is an opportunity to:

  • Promote your industry partners and share the good work they do
  • Share new technologies your organization is utilizing


Award winners will receive:

  • recognition in Georgia construction publications
  • recognition on Georgia ACI website
  • recognition and awards plaque at the annual awards banquet


Eligibility:


All architects, engineers, contractors, developers and industry-related professionals are eligible to enter this competition. Projects to be nominated must have been completed between January 1, 2016 and October 31, 2017 and be located in the state of Georgia. 

There is a $95 cost per entry.  

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Calendar of Events

Saturday, May 6, 2017
ACI Field Tech Grade I & Strength Tech Training
TEC Services, Inc.
Lawrenceville, GA
8:00 am - 12:30 pm

Saturday, May 13, 2017
ACI Field Tech, Grade I & Strength Tech Certification Exams
Thomas Concrete Lab
Atlanta, GA
7:30 am — 2:00 pm

Friday, May 19, 2017
GA Chapter ACI Lunch Meeting
Mass Concrete: How Big is Big?
Robert Howell, PE
Professional Development Engineer w/ ACI International

Westin Perimeter Atlanta North
11:30 am Registration
12:00-1:30 pm Lunch Meeting

Saturday, May 20, 2017
ACI Flatwork Finisher Training & Certification Exam
Argos Concrete Lab
Cumming, GA
7:30 am — 2:00 pm

Saturday, June 3, 2017
ACI Field Tech Grade I & Strength Tech Training
TEC Services, Inc.
Lawrenceville, GA
8:00 am - 12:30 pm

Saturday, June 10, 2017
ACI Field Tech, Grade I & Strength Tech Certification Exams
TEC Services, Inc.
Lawrenceville, GA
7:30 am — 2:00 pm

Monday-Thursday, June 12-15, 2017
ASTM Summer Committee Meetings
Sheraton Centre Toronto
Toronto, Ontario Canada
Meeting Information and Registration available at:
www.astm.org

Saturday, June 17, 2017
ACI Aggregate & Lab Tech Training
TEC Services, Inc.
Lawrenceville, GA
8:00 am – 2:00 pm

Saturday, June 24, 2017
ACI Tilt-Up Concrete Technician/Supervisor Training & Certification Exam
Argos Concrete Lab
Cumming, GA
7:30 am — 2:00 pm

Saturday, July 1, 2017
ACI Field Tech Grade I & Strength Tech Training
TEC Services, Inc.
Lawrenceville, GA
8:00 am - 12:30 pm 

Saturday, July 8, 2017
ACI Field Tech, Grade I & Strength Tech Certification Exams
Lehigh SE Concrete Lab
Doraville, GA
7:30 am — 2:00 pm

Saturday, July 15, 2017
ACI Aggregate & Lab Tech Exams
TEC Services, Inc.
Lawrenceville, GA
7:30 am – 2:00 pm

Saturday, July 22, 2017
ACI Masonry Field & Lab Tech Training
S&ME Laboratory
Duluth, GA
8:00 am - 12:30 pm

Important Note:  ACI Training & Exams are for
Pre-registered Persons Only.
**No walk up seating available**

For Information on any of our exams or events go to: www.aci-ga.org

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