Granulated blast furnace slag
Granulated blast furnace slag is obtained from liquid blast furnace slag during the blast furnace process in pig iron production.
Blast furnace slag is a lime-alumina-silicate melt primarily containing CaO, SiO2 and Al2O3. In its chemical composition, blast furnace slag is similar to Portland cement. Granulated blast furnace slag is a sand-like construction material that is formed when the slag is rapidly cooled with a water jet. It has a particle size of less than 5 mm.
Pulverizing granulated blast furnace slag into ground granulated blast furnace slag creates a latent hydraulic construction material, which – when excited with sulfate or CaO carriers – displays a strength profile similar to that of cement.
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