LOW C3A CONTENT
Sulphate salts present in some soils combine with moisture and tri-calcium aluminate (C3A), one of the constituents of cement to form a compound known as Sulpho Aluminate off Hydrated Calcium. This compound is highly expansive and gradually results in the destruction of concrete. However, if a C3A content is very low, it is rendered inert and there is thus no reaction at all. British and Pakistani standards specify that in a Sulphate Resistant Cement, the C3A content must not exceed 3.5%. D.G Sulphate Resistant Cement has a much lower C3A content, making the cement highly effective against Sulphate attacks.
As with any type of cement, strength is the fundamental property of Sulphate Resistant Cement. D.G. Sulphate Resistant Cement achieves high strength through finer grinding and better particle distribution. In term of strength,, it not only exceeds by far the standards specified for Sulphate Resistant Cement but also exceeds those of Ordinary Portland cement.