hot weather concrete issues

Tech Bulletin No. 6 - Hot-Weather Concrete Practice

Evaporation Rate Nomograph

In case you thought winter would never end—look out, summer is here!

With it comes a change in concrete practice. Temperature, humidity and wind create challenges to proper placement and curing.

The Evaporation Rate Nomograph (shown above) is a tool developed by the NRMCA in 1960 to combat rapid-drying problems such as plastic shrinkage cracking. The example line in light blue shows the steps and variables needed to determining evaporation rate.

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