Precautions to be Taken During Hot Weather Concreting:

Proportioning of Concrete Mix

As far as possible, cement with lower heat of hydration should be preferred to those having greater fineness and heat of hydration. The mix should be designed to have minimum cement content consistent with other functional requirements. Accelerators should not be used in hot weather concreting.

Water-reducing or set-retarding admixtures might be used in hot weather concreting.

Temperature Control of Concrete Ingredients

Controlling the temperature of the ingredients of concrete results in lowering the temperature of concrete. The ingredients may be protected from direct sunrays by using sheds. Water can be sprinkled on to the aggregate before using them in concrete. The temperature of water is easier to control than that of other ingredients of concrete. The mixing water has the greatest effect on lowering the temperature of concrete, because the specific heat of water is nearly five times that of common aggregate. The pre-cooling of aggregates can be achieved at the mixing stage by adding calculated quantities of broken ice pieces as a part of mixing water; provided the ice is completely melted by the time mixing is completed.