Wonder Cement Dealers in Banjara Hills, Hyderabad

Pozzolana is a natural or artificial material containing silica in a reactive form. It may be further discussed as siliceous or siliceous and aluminous material which in itself possesses little, or no cementitious properties but will in finely divided form and in the presence of moisture, chemically react with calcium hydroxide at ordinary temperature to form compounds possessing cement properties. It is essential that Pozzolana be in a finely divided state as it is only then that silica can combine with calcium hydroxide (liberated by the hydrating Portland Cement) in the presence of water to form stable calcium silicates which have cement properties.

It is a specialty cement manufactured as per specifications originally formulated by the Indian Railways vide their specification No.IRS T-40 for manufacturing concrete sleepers. However, there was an amendment (No.6) to IS 12269, IRS T-40 cement and then, this was brought under the ambit of BIS. It is now designated as 53-S Ordinary Portland Cement and conforms to BIS specification IS:12269-1987. 53-S OPC's negligible chloride content protects it against corrosion. High fineness enhances workability and high early strength enables improved mass production cycle of Railway Sleepers. Apart from its main usage in the manufacture of concrete sleepers, it can also be put to use in pretest concrete elements or high rise buildings where high early strength is required.

• white: grey
• 42: 42.5
• 32.5, : 42.5 R/N
• cement OPC 42.5 : Portland Cement 42,5 CEM II A

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