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Low Carbon Concrete 
Code 323 by, Matthew Adams

Associate Professor of Civil Engineering at New Jersey Institute of Technology and Public Policy Fellow at the Rockefeller Institute of Government

Maggiano's Tyson's Corner 

2001 International Dr. 

June 10, 2025

Tuesday

Jim Martinoski, president of NCCACI receiving our Excellent Chapter banner from outgoing president ACI, Michael Paul at the Toronto Convention Spring 2025

Excessive Overdesign of Concrete Mixtures for Strength—Causes and Solutions 

Presented by Karthik Obla, Ph.D., P.E., FACI

Maggiano's Tyson's Corner 

2001 International Dr. 

May 8, 2025

Thursday

5:30 pm Social 1/2 Hour

6:00 pm Dinner

7:00 pm Presentation

$85- Members 

$95 Non-members

$35- Up and Coming Concrete Associates (under 35 please) 

Talk details 

It is well known that concrete mixtures are overdesigned for compressive strength. Many instances have occurred where concrete mixtures with a 28-day specified strength of 4000 psi have exceeded 7000 psi in measured average strength. These strengths greatly exceed the required average strengths given in ACI SPEC-301-20. This results in an increased carbon footprint due to much higher cementitious materials used and added construction costs. The mixtures also have higher paste contents that can lead to other performance problems, such as cracking, higher in-place concrete temperatures, excessive shrinkage and creep, and alkali-silica reaction. In this presentation, Dr. Obla will discuss some of the reasons why concrete mixtures are over designed and offer solutions to reduce this issue. A paper on this subject was published in November 2024 issue of the Concrete International magazine.  

 

Speaker's Bio 

Karthik Obla, Ph.D., P.E., FACI is Director – Technical Services at Vulcan Materials Company. Before joining Vulcan in January, he was Senior Vice President, Technical Services at the National Ready Mixed Concrete Association (NRMCA). Over his 30 years of experience in concrete technology, he has been involved in various concrete producer quality initiatives, research investigations, educational programs and technical publications.  

Karthik holds a Masters and a Ph.D. degree in Civil Engineering from the University of Michigan, Ann Arbor, and is a licensed professional engineer in the state of Maryland. He has published a book on concrete quality, a chapter in a book on concrete sustainability, and has published over 100 technical papers.    

Karthik is a Fellow of the American Concrete Institute and a winner of several ACI and ASTM awards. He is an honorary member of the ASTM C01 and C09 committees on cement and concrete and the recipient of the Richard D. Gaynor award from NRMCA. Karthik is a member of the executive subcommittee for the ASTM C09 committee on concrete and has taken a leadership role or has been an active member of several ACI, ASTM, and TRB technical committees, and NCHRP panels.  

To Register: https://www.nccaci.org/event-6130074

"Build to Last, Build with Concrete"  

WE DID IT AGAIN!!!!!!

                           

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