engineering recuitment OSSC Combined Technical Services (ଓଡିଶା) Mock Test 2023-24 Construction Materials and Management Concrete
The approximate ratio of the strength of cement concrete at 7 days to that at 28 days is
1
0.45
2
0.60
3
0.87
4
1.15
The approximate ratio of the strength of cement concrete at 7 days to that at 28 days is