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Q: Pick up the correct statement from the following.
  • A. The concrete gains strength due to hydration of cement
  • B. The concrete cured at a temperature below 23º C, gains strength up to 28 days
  • C. The concrete does not set at freezing point
  • D. All options are correct
Correct Answer: Option D - Temperature in the enclosure surrounding the concrete should not be increased or decreased more than 230C to 330C per hour depending on the size and shape of the concrete element. There is reduction in shrinkage and creep as of concrete cured at 230C for 28 day. • The concrete gain strength due to the hydration of cement. • The concrete does not set at freezing point.
D. Temperature in the enclosure surrounding the concrete should not be increased or decreased more than 230C to 330C per hour depending on the size and shape of the concrete element. There is reduction in shrinkage and creep as of concrete cured at 230C for 28 day. • The concrete gain strength due to the hydration of cement. • The concrete does not set at freezing point.

Explanations:

Temperature in the enclosure surrounding the concrete should not be increased or decreased more than 230C to 330C per hour depending on the size and shape of the concrete element. There is reduction in shrinkage and creep as of concrete cured at 230C for 28 day. • The concrete gain strength due to the hydration of cement. • The concrete does not set at freezing point.