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The grade of cement is determined by its compressive strength, which is normally expressed as the 28-day compressive strength of concrete cubes tested according to a standard procedure. Generally, grades of cement are denoted by letters such as OPC 33, OPC 43 and OPC 53, where OPC stands for OrdinarRead more
The grade of cement is determined by its compressive strength, which is normally expressed as the 28-day compressive strength of concrete cubes tested according to a standard procedure. Generally, grades of cement are denoted by letters such as OPC 33, OPC 43 and OPC 53, where OPC stands for Ordinary Portland Cement and the numbers indicate the characteristic strength of the cement in terms of megapascals (MPa).
Concrete with a strength of 10 MPa is considered to be the minimum acceptable strength for most applications, and the higher grades of cement such as OPC 43 and OPC 53 are normally used for special applications such as bridges and high rise buildings.
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