Q. According to IS : 269 - 1976, the requirement of an ordinary Portland cement is that (Solved)
1. the residue does not exceed 10% when sieved through IS sieve No. 9
2. its expansion is not more than 10 mm for unaerated cement
3. its initial setting time is not less than 30 minutes
4. all of the above
- d. all of the above