Posted by PROMOD SINHAover 7 years ago
Concrete Technology
After how many days is the strength of cement is tested and graded according to the result?
1 Reply
Posted by Steinley infraover 7 years ago
Cement blocks can be tested at 1 day, 3 days, 7 days and 28 days. Usually 1 day doesn't give any result. Strength of 43 grade OPC at the end of 3 days is 23, 7 days is 33 and 28 days is 43. So, it increases with time.