June 2020 Chapter Meeting

June 11, 2020
11:30 AM - 12:30 PM
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Webinar

Anywhere, TX,
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Mass Concrete: Does my project need a thermal control plan?

Jacob L. Borgerson

 

When concrete is mixed, a chemical reaction occurs between the cement and water which generates heat (i.e., heat of hydration). For large concrete elements designated as mass concrete, a substantial amount of heat can be generated. The American Concrete Institute, however, does not specifically define the size limits of mass concrete. As a result, the specifier for the project is often responsible for determining what constitutes “mass concrete”. This presentation will discuss factors that contribute to heat generation and concerns associated with mass concrete (e.g., thermal cracking, delayed ettringite formation). In addition, the critical components of a mass concrete thermal control plan will be described. Finally, attendees will be introduced to various methods of temperature control (e.g., low-heat materials, pre/post-cooling techniques, and application of surface insulation) and when their use is appropriate. Case studies will be used to illustrate the concepts presented. This presentation will benefit engineers, architects, testing laboratories, contractors, ready-mix suppliers, owners, and anyone who has sat in a job site trailer to discuss mass concrete.

 

Jacob L. Borgerson is a Senior Associate with Wiss, Janney, Elstner Associates, Inc. He received a Ph.D. in Engineering from the University of Illinois at Urbana-Champaign. Dr. Borgerson specializes in providing concrete expertise in multiple areas including low strength, mass concrete, cracking, finishing defects, in addition to others. He is a member of the American Concrete Institute (ACI) and International Concrete Repair Institute (ICRI). In addition, he serves on ACI Committees 207, Mass Concrete and 117, Tolerances for Concrete Construction. He is a licensed professional engineer in multiple states, including Louisiana and Texas.