During 1976 there was only one type of cement available. Later OPC had been graded and the gain in strength after 28 days had been based on the grade and type of cement. The design was based on 28 days’ characteristic strength of concrete unless there was evidence to justify a higher strength for a particular structure due to age (IS: 456–2000). Different grades of cement are given in Table 8.2.
Table 8.2 Grades of cement concrete
Source: IS: 456–2000.
Leave a Reply