Precautions for hot-weather concreting should be planned when the temperature is expected to reach 30 to 35°C or more. These precautions may have one or more of the following applications:
- cooling of concrete ingredients
- dampening of formwork, reinforcement and subbase
- erection of wind breaks and sunshades to protect exposed concrete surfaces
- cooling of containers, pipelines, chutes, etc during transportation of concrete
- completion of transporting, placing and finishing of concrete as quickly as possible
- use of set-retarding admixtures to control premature stiffening of the fresh mix
- use of some chemicals on the exposed surface of concrete to limit evaporation
- immediatly start curing after final finishing is complete
- moist curing to control concrete temperature
- restricting the placement of concrete during night time when the temperatures are generally lower.
