SOURCE
https://www.eng-tips.com/viewthread.cfm?qid=455422
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QUESTION
What is the maximum allowed air temperature for concreting works? Is there any standard ASTM ACI or BSEN specifying maximum allowed ambient temperature for concrete works?
REPLIES
BigH
There is a whole ACI standard for hot-weather concreting (305R-10). You need to deliver concrete to the site at a prescribed maximum temperature - I see above 32degC; specs I have seen is 30degC (in Asia). But with the high ambient air temp, you should also be considering shading (tent or tarp of other means) for both minimizing the temperature AND for damaging wind effects on the setting up of the concrete - and also misting - you want to keep the surface of the concrete from drying out - if it dries out too fast, you can get plastic shrinkage cracks. And, in my view, I don’t like curing compounds in hot weather.