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Q: Which of the following is the important factor that affects the shrinkage of cement concrete?
  • A. Quantity of cement
  • B. Size of coarse aggregates
  • C. Size of the fine aggregate
  • D. Amount of water added during mixing of concrete
Correct Answer: Option D - Amount of water added during mixing of concrete is the factor that affects the shrinkage of cement concrete. The object of mixing is to make the concrete mass homogeneous and uniform in colour and consistency. A prolonged mixing may cause segregation, due to longer mixing periods the water may get absorbed by the aggregates or evaporate resulting in loss of workability and strength.
D. Amount of water added during mixing of concrete is the factor that affects the shrinkage of cement concrete. The object of mixing is to make the concrete mass homogeneous and uniform in colour and consistency. A prolonged mixing may cause segregation, due to longer mixing periods the water may get absorbed by the aggregates or evaporate resulting in loss of workability and strength.

Explanations:

Amount of water added during mixing of concrete is the factor that affects the shrinkage of cement concrete. The object of mixing is to make the concrete mass homogeneous and uniform in colour and consistency. A prolonged mixing may cause segregation, due to longer mixing periods the water may get absorbed by the aggregates or evaporate resulting in loss of workability and strength.