Specificatioon for sulphate resisting Portland cement — IS 12330 (1988) Testing

Testing helps verify whether SRPC meets the specified chemical and physical requirements of IS 12330:1988. BIS’s current laboratory system lists testing facilities and requirements for this standard, supporting conformity assessment and quality verification.

No. BIS specifically distinguishes Sulphate Resisting Portland Cement from supersulphated cement. They are different cement types with different compositions and characteristics.

Sulphate Resisting Portland Cement can be used for structural concrete where sulphate exposure may cause deterioration. Typical applications include foundations in sulphate-rich soils, underground structures, wastewater facilities and other aggressive environments.

BIS testing references supporting methods from standards including IS 4031 for physical tests and IS 4032 for chemical analysis. The applicable test depends on the specific requirement under IS 12330:1988.

BIS laboratory listings include tests for fineness, Le Chatelier and autoclave expansion, initial and final setting time, compressive strength, chemical composition, C₃A, SO₃, magnesia, insoluble residue and loss on ignition.

The key feature of SRPC is its restricted tricalcium aluminate (C₃A) content. Limiting C₃A helps reduce chemical reactions with sulphates that can cause expansion, cracking and deterioration of concrete.

SRPC is used where concrete may be exposed to sulphate-rich conditions. Its low tricalcium aluminate content helps reduce the risk of sulphate attack, making it suitable for aggressive environments such as sulphate-bearing soil, groundwater and certain marine or wastewater conditions.

As per recent BIS publications, IS 12330:1988 was reviewed/reaffirmed in 2024 and remains listed by BIS as the specification for Sulphate Resisting Portland Cement.