Blast Furnace Slag (BFS) Powder and Granulated Blast Furnace Slag Cement (GBFS)

Raw materials and production processes

Molten slag, made from iron ore, limestone, coke and fluxing agents in the smelting process of molten iron in a wholly integrated steel mill, is made into CNS1223 water-quenched blast furnace slag after being subject to jet streams of water or air under pressure. Its main chemical components are CaO, SiO2, and Al2O3, which are similar to those of Portland cement. It is cementitious and can be made into CNS12549 blast furnace slag powder, BFS powder, after being ground, which is further made into Portland blast furnace cement (PBFC) after high-performance blending with Portland cement.

The product uniformity and performance of GBFS cement meet CNS15286 national standards, and it is a mature product domestically and internationally. There are relevant specifications, such as ASTM C595 (U.S.A.), JIS R5211 (Japan), and EN 197 (E.U.) set for GBFS cement.

Domestically, different types of CNS15286 hydraulic blended cement are categorized according to the performance of GBFS cement. Each type of GBFS cement must pass its relevant designated performance tests; for example, ISMS sulfate resistant GBFS cement must pass the CNS14794 expansion test regarding sulfate resistance.
In general engineering construction, GBFS cement can replace Portland cement in making concrete. If high strength, durability, impermeability, and/or salt tolerance are required in concrete, GBFS cement has better performance than Portland cement. CHC Resources Corporation is the largest domestic producer of BFS powder and GBFS cement and can offer different types of GBFS cement according to the demands and engineering performance requirements of customers.