Cement is a widely used construction material that is used to bind other building materials such as sand, gravel, and bricks. Here are some of the common grades of cement: Ordinary Portland Cement (OPC): OPC is the most commonly used type of cement, which is made by grinding clinker and adding small amounts of gypsum to regulate the setting time. OPC is available in three grades, which are: Grade 33: This type of cement is suitable for general construction purposes where the strength requirement is low. Grade 43: This type of cement is used for construction purposes where moderate strength is required, such as in the construction of beams, columns, and slabs. Grade 53: This type of cement is used for high-strength construction purposes such as bridges, high-rise buildings, and industrial structures. Portland Pozzolana Cement (PPC): PPC is made by adding pozzolanic materials such as fly ash, volcanic ash, or silica fume to OPC. The pozzolanic materials make the cement more resistant to
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