What is a good practice to follow when mixing concrete in hot weather?

Explanation:

• Using cold water in hot weather helps reduce the temperature of the mix, slowing down the hydration process and minimizing the risks of early setting and cracking.
• It also allows for better workability and longer setting time, which is crucial when pouring in high temperatures.

Additional Information

Add large amount of fine aggregate to the mix.

• Not a good practice.

• Adding more fine aggregate does not help in controlling the temperature of the mix and could affect the strength and workability of the concrete. It may also lead to segregation if not properly mixed.

Use warm water for mixing.

• Not a good practice in hot weather.

• Warm water can increase the temperature of the concrete mix, accelerating hydration and leading to a higher rate of setting. This can cause issues like cracking and reduced strength. Cold water is preferred to reduce the temperature of the mix.

Add large amount of cement to the mix.

• Not a good practice.

• Adding excess cement can increase the heat of hydration, making the concrete even hotter. This could lead to thermal cracking and reduced long-term strength.