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Sulfate resisting cement

The BS 4027 Sulfate-resisting Portland cement (SRPC) is now not available, however EN 197 has now introduced a Sulfate-resisting Portland cement designated as CEM I-SR. The availability, whether bulk or in bags, is not known. 

Ready-mixed concrete suppliers are using combination cements, where fly-ash or ground granulated blastfurnace cement (ggbs) is combined at the mixer with Portland cement (CEM I), to provide sulfate resistance.

For the bagged market, factory produced cements incorporating fly ash or ggbs, that are suitable for sulfate conditions, are now available. The notation of these sulfate resisting cements (SRC) are "CEMII/B-V + SR" and "CEMIII/A + SR", respectively.

Acknowledgement: Concrete Society