May 02, Comments. Concrete poured in hot weather, low humidity, or high wind can suffer adverse effects if proper adjustments are not made to the process. Among other things, this can include using shade to block direct sunlight or spraying aggregates with cold water to keep them cool. Concrete sets by hydrating. In other words, it sucks up water and forms crystals around the particles in the concrete. The cooler the concrete, the longer this process takes and the more time the crystals have to strengthen. When the concrete is hotter, the crystallization process happens more quickly, giving the crystals less time to strengthen. Evaporation also can have a negative effect on the surface layer of the concrete. The lack of water there will lead to weaker concrete at the top of the slab, which means the concrete will be more susceptible to cracking.
STAGES OF DEVELOPMENT
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May 02, Comments. Concrete poured in hot weather, low humidity, or high wind can suffer adverse effects if proper adjustments are not made to the process. Among other things, this can include using shade to block direct sunlight or spraying aggregates with cold water to keep them cool. Concrete sets by hydrating.