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Q. |
The compressive strength of a good Portland cement and standard sand mortar after 3 days of curing should not be less than |
A. | 7 MN/m2 |
B. | 11.5 MN/m2 |
C. | 17.5 MN/m2 |
D. | 21 MN/m2 |
Answer» B. 11.5 MN/m2 |
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