Slag

Granulated Blast Furnace Slag
(GBFS)

Brief Description
GBFS is formed when molten blast furnace slag (BFS) is rapidly quenched from the furnace, rather than left to slowly solidify by air-cooling.
Physical Description
On casual examination, GBFS would pass for river sand, with a top size of about 6 mm. It typically has a density of about 60 - 70% of natural sand.
Applications
GBFS may be used without further processing as a construction sand, soil/pavement stabilising media or grit-blasting material.

Ground Granulated Blast Furnace Slag (GGBFS)

Brief Description
GGBFS is formed when granulated blast furnace slag (GBFS) is further processed or ground using conventional cement clinker grinding technology.
Physical Description
On a casual examination, GGBFS can be off-white in appearance and could pass for a powder fineness typically between 380m2/kg - 420m2/kg.
Applications
GGBFS is typically used in activation of granular pavement materials and as a cementitious material in the manufacture of concrete, particularly where resistance to aggressive ground, water and aggressive environmental conditions are present.