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Q1. |
An air entraining agent when added in concrete improves : |
Q2. |
For making impermeable concrete, the process contains : |
Q3. |
Strength of concrete is directly proportional to : |
Q4. |
After casting ,on ordinary cement concrete on drying : |
Q5. |
Strength of concrete increases with increases in : |
Q6. |
Approximate ratio of strength of cement concrete at 3 months to that at 28 days of curing is : |