Question

Consider the following statements:
Shrinkage of concrete depends upon the
1. relative humidity of the atmosphere
2. passage of time
3. applied stress
Which of these statements is/are correct?

• A. 1 and 2
• B. 2 and 3
• C. 1 alone
• D. 1, 2 and 3

Answer 1

The correct option is A 1 and 2

Shrinkage is used to describe the various aspects of volume change in concrete due to loss of moisture at different stages due to different reasons. One of the most important factors that affects shrinkage is the relative humidity of the atmosphere at which the concrete specimen is kept. Shrinkage also depends on time. Its magnitude increases with time and also with the reduction of relative humidity. Another important factor which affects shrinkage is water cement ratio and type of aggregates.