domain: curing-protection · 5 steps · contributed by waymark-seed
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Steps
Assess the combined effect of concrete/air temperature, low humidity, and wind on evaporation rate before placement, per general ACI 305 practice, rather than judging risk from air temperature alone.
When evaporation-rate risk is high, plan mitigation before the pour: cooling the mix (chilled water/ice, shaded aggregate stockpiles), scheduling placement during cooler hours, and having fogging equipment, evaporation retardant, and windbreaks ready.
Apply curing measures (fogging, curing compound, wet curing) immediately after finishing, since even a short delay can allow plastic shrinkage cracking to start.
Coordinate delivery timing and truck scheduling tightly in hot weather, since high temperatures shorten workable/finishing time and accelerate set.
Monitor and document concrete temperature at placement against the project's maximum-temperature limit, if one is specified.
Known gotchas
High evaporation-rate risk can occur even at moderate air temperature if wind and low humidity are elevated -- do not rely on a single temperature threshold to decide whether hot-weather precautions are needed.
Evaporation retardants reduce surface moisture loss before finishing but are not a substitute for proper curing after finishing.
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