Cool and Cold Weather for Concrete and for People

    December 11, 2019
    6:15 PM - 8:00 PM
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    The Boat House at Confluence Park
    679 West Spring St
    Columbus, OH 43215
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    SUMMARY: Predictions of cold weather on a concrete project usually bring-on shivers of concern about freezing ground, freezing concrete and freezing rebar, but the reality is that if the concrete gets cold enough to freeze, you have other problems that might be more serious.  Two of those problems are 1.) Rapid drying (evaporation in Ohio is more severe in winter than in summer) and slow rate of strength gain, especially at early ages.  The Portland cement in 52-degree concrete is hydrating only half as fast as the concrete cylinders sitting in the lab curing room at 73F.  On even a mild winter day that difference can have a huge impact on forming, shoring, prestressing, and applying construction loads.  But when we decide to protect the concrete, it will usually take more than a thin layer of poly to make a real difference.  Sometimes we must adjust the mix and heat the water!  To clarify some of these points the discussion will include a comparison between how concrete responds to cold weather, and how the human body responds to the same cold weather.

    PRESENTER: Ken Hover, P.E., Ph.D. is a professor at Cornell University and has been a top-ranked technical speaker at the World of Concrete for over 20 years. He earned national research awards from ACI and ASCE. He earned the top teaching awards in Civil Engineering at Cornell University and holds ACI and ACPA Educators Awards. His research concentrates on hot and cold weather concreting, concrete and masonry testing and durability, effects of weather and construction operations on concrete testing, performance and durability. In addition to his research, Ken teaches reinforced concrete design, concrete materials, and construction management.

    Ken is a licensed professional engineer in Ohio and New York. He earned his Bachelor of civil engineering degree from the University of Cincinnati and served as an officer in the U.S. Army Combat Engineers. After years of experience working for Dugan & Meyer Construction Co. and THP Ltd. Consulting Engineers, Ken won an Exxon Foundation grant to complete his Ph.D. studies in Civil Engineering at Cornell University, with the purpose of bringing experienced engineers to the faculty of U.S. Universities.

    Ken’s 200+ publications address freeze-thaw durability, scaling resistance, air-entrained concrete and cold and hot-weather concrete. Ken is Past-President of ACI, and member and past chair of several ACI committees. He earned NRMCA’s Gaynor Award and is a Distinguished Member of ASCE and an Honorary Member of both ACI and the Institution for Concrete Technology in the UK.

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    $35.00 Member Ticket

    $40.00 Non-Member Ticket

    $15.00 Student Ticket