Question

In rate analysis procedure, by what % the wet volume of concrete is to be increase for determining dry volume?
1. 20%
2. 30%
3. 52%
4. 25%

Answer 1

Correct Answer - Option 3 : 52%

Explanation:

In rate analysis to find the dry volume, wet volume is increased by 52% because

• In dry state, air voids are present in the constituents of concrete and while mixing with water, it is eliminated and a chemical reaction takes place.
• Hence a reduction in volume happens.
• And it is seen in natural practice that the number roughly varies from 52% to 58%.
• So it became a thumb rule to increase it by 52% to find the dry volume of constituents of concrete.