53 grade cement means that the compressive strength of the cement after 28 days is 53 N/mm3 when tested. 53 grade cement has a fast setting time as compared to 43 grade cement.
This grade of cement is not used for ordinary works. It is mostly used for structural purposes as in reinforced cement concrete. 53 grade cement is suitable in making concrete mix above m25. It can also be used in restressed concrete.
The use of OPC 53 grade cement is particularly useful in certain pre-stressed and pre-cast concrete work that consistently require high strength concrete. This grade of cement ensures strong speedy construction with early removal of formwork, thereby reducing construction costs considerably.