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Q: For testing compressive and tensile strength of cement, the cement mortar is made by mixing cement and standard sand in the proportions of
  • A. 1 : 2
  • B. 1 : 3
  • C. 1 : 4
  • D. 1 : 6
Correct Answer: Option B - Compressive strength of cement – The test for compressive strength is generally carries out by crushing the cube of hardened cement-sand mortar (1 : 3) in a compression testing machine. • Size of cube for cement (compressive strength) = 70.6 mm (3 cube require) • Rate of loading (IS : 4031) - 350 kg/cm²/min.
B. Compressive strength of cement – The test for compressive strength is generally carries out by crushing the cube of hardened cement-sand mortar (1 : 3) in a compression testing machine. • Size of cube for cement (compressive strength) = 70.6 mm (3 cube require) • Rate of loading (IS : 4031) - 350 kg/cm²/min.

Explanations:

Compressive strength of cement – The test for compressive strength is generally carries out by crushing the cube of hardened cement-sand mortar (1 : 3) in a compression testing machine. • Size of cube for cement (compressive strength) = 70.6 mm (3 cube require) • Rate of loading (IS : 4031) - 350 kg/cm²/min.