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Q: After how many days, the strength of the cement is tested and graded according to the result?
  • A. 7 days
  • B. 28 days
  • C. 14 days
  • D. 3 days
Correct Answer: Option B - After 28 days, the strength of the cement is tested and graded according to the result. As per IS 4031 Part VI : Compressive strength (MPa)– • OPC 33 – 33 • OPC 43 – 43 • OPC 53 – 53
B. After 28 days, the strength of the cement is tested and graded according to the result. As per IS 4031 Part VI : Compressive strength (MPa)– • OPC 33 – 33 • OPC 43 – 43 • OPC 53 – 53

Explanations:

After 28 days, the strength of the cement is tested and graded according to the result. As per IS 4031 Part VI : Compressive strength (MPa)– • OPC 33 – 33 • OPC 43 – 43 • OPC 53 – 53