Question

In cold weather conditions, the temperature of concrete should not be allowed to fall below ___________ for at least 3 days after its placing.

(a) 5° C

(b) 25°C

(c) 15°C

(d) 50°C

The question was posed to me in an online interview.

The query is from Placing of Concrete in division Cement Concrete Construction of Construction & Building Materials

Answer 1

Right answer is (c) 15°C

Explanation: At the time of placing, the temperature of concrete should be between 15° Celsius to 25° Celsius and it should not be allowed to come into contact with water having a temperature of 35° Celsius.