What is the recommended method for curing concrete on hot, windy days?

Using wet burlap or curing compounds to retain moisture is the recommended method for curing concrete on hot, windy days. High temperatures and wind can accelerate the evaporation of moisture from the surface of freshly placed concrete, which can lead to issues like surface cracking and reduced strength due to insufficient hydration.

Wet burlap helps maintain moisture levels by creating a cooling effect and preventing the rapid loss of water. This method allows the concrete to cure properly, ensuring that the hydration process continues effectively. Curing compounds, which form a film on the surface, also help seal in moisture while allowing the concrete to breathe enough to avoid trapping air or excessively increasing pressure.

The use of a fan, although it might provide temporary relief from heat, can also exacerbate moisture loss if not used carefully. Applying a thick layer of sealant immediately may trap heat and could prevent proper curing as it limits moisture access. Covering with plastic sheeting to retain heat is counterproductive, as it can lead to high temperatures under the plastic, causing moisture to evaporate quickly. Thus, maintaining moisture is crucial for curing during hot, windy conditions, making the use of wet burlap or curing compounds the ideal approach.