Concrete Problems Associated With Hot Climates

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Title: Concrete Problems Associated With Hot Climates

Author(s): J. M. Scanlon

Publication: Special Publication

Volume: 139

Issue:

Appears on pages(s): 131-142

Keywords: accelerating agents; admixtures; concretes; construction; curing; durability; humidity; strength; temperature; wind velocity; Materials Research

Date: 9/1/1993

Abstract:
The best time to place quality concrete is during cold weather, as long as the concrete is prevented from freezing. Why is it so hard to place quality concrete during hot climate conditions? The culprits are concrete temperature, air temperature, humidity, and wind velocity. There are secrets that can drastically improve the present quality of concrete placed in hot climates. This paper discusses how to cope with hot weather conditions and still produce high-quality concrete. Concrete in hot climates is affected by water demand, rapid setting times, and the resulting ultimate strength reduction. Understanding these detrimental effects and how to overcome them can result in high-quality, durable concrete. Many of these effects can be overcome by using the proper chemical or mineral admixture, but using techniques slightly different than the usual. There may be times when an accelerating admixture, or insulation, may be used effectively even in hot climates. Relatively high concrete temperatures may be appropriate to obtaining durable concretes.