Computer · Building Materials
The compressive strength of 33 grade Ordinary Portland Cement (OPC) shall be 33 MPa (minimum) calculated at:
- 128 days ± 6 hours
- 228 days ± 4 hours✓
- 328 days ± 2 hours
- 428 days ± 1 hour
Correct answer
28 days ± 4 hours
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