search
arrow-left Previous
Next arrow-right
Q: In ondinary cement, about 99% of its final strength is achieved in_____.
  • A. 3 days
  • B. 7 days
  • C. 28 days
  • D. 1 year
Correct Answer: Option C - Strength of cement is mainly assumed on the basis of compressive strength of cement. Compressive strength of cement is determined from cubes of face 50cm2 of area (7.06 cm cubes) made of cement mortar with one part of cement and three part of standard sand (as per IS 650-1966). The avg. cube strength of three sample is taken as test value. The cement achieves its 99% of final strength after 28 days.
C. Strength of cement is mainly assumed on the basis of compressive strength of cement. Compressive strength of cement is determined from cubes of face 50cm2 of area (7.06 cm cubes) made of cement mortar with one part of cement and three part of standard sand (as per IS 650-1966). The avg. cube strength of three sample is taken as test value. The cement achieves its 99% of final strength after 28 days.

Explanations:

Strength of cement is mainly assumed on the basis of compressive strength of cement. Compressive strength of cement is determined from cubes of face 50cm2 of area (7.06 cm cubes) made of cement mortar with one part of cement and three part of standard sand (as per IS 650-1966). The avg. cube strength of three sample is taken as test value. The cement achieves its 99% of final strength after 28 days.