better workability, making placing and compaction easier lower early-age temperature rise, reducing the risk of thermal cracking in large pours elimination of the risk of damaging internal reactions such as ASR high resistance to chloride ingress, reducing the risk of reinforcement corrosion high resistance to attack by sulphate and other chemicals

In the production of ready-mixed concrete, GGBS replaces a substantial portion of the normal Portland cement content, generally about 50%, but sometimes up to 70%. The higher the proportion, the better is the durability. The disadvantage of the higher replacement level is that early-age strength development is somewhat slower.

GGBS is also used in other forms of concrete, including site-batched and precast. Unfortunately, it is not available for smaller-scale concrete production because it can only be economically supplied in bulk. GGBS is not only used in concrete: other applications include the in-situ stabilisation of soil.