Question

Why the time period for removal of form work has to be increased.

(a) The development of strength of concrete is retarded compared with development at normal temperature

(b) The development of strength of concrete is accelerate compared with development at normal temperature

(c) The development of strength of concrete is advanced compared with development at normal temperature

(d) The development of strength of concrete is precocious compared with development at normal temperature

This question was posed to me during an interview.

This key question is from Factors Affecting PIC, Cold Weather Concreting topic in chapter Special Concrete and Concreting Methods of Concrete Technology

Answer 1

Right choice is (a) The development of strength of concrete is retarded compared with development at normal temperature

The explanation is: When the temperature is falling to about 50C or below, the development of strength of concrete is retarded compared with development at normal temperature. Thus, the time period for removal of form work has to be increased.