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Q: To prevent segregation, the maximum height for placing concrete is
  • A. 100 cm
  • B. 125 cm
  • C. 150 cm
  • D. 200 cm
Correct Answer: Option C - Methods of placing should be such as to preclude segregation. Case should be taken to avoid displacement of reinforcement or movement of formwork. As a general guidance, the maximum permissible free fall of concrete may be taken as 1.5m.
C. Methods of placing should be such as to preclude segregation. Case should be taken to avoid displacement of reinforcement or movement of formwork. As a general guidance, the maximum permissible free fall of concrete may be taken as 1.5m.

Explanations:

Methods of placing should be such as to preclude segregation. Case should be taken to avoid displacement of reinforcement or movement of formwork. As a general guidance, the maximum permissible free fall of concrete may be taken as 1.5m.