Granulated blast furnace slag – GBFS (SLAG GRANULES)
Ground granulated – GGBFS (SLAG POWDER)
Slag is a non-metallic by-product of the steel-making process sourced from blast-furnaces which is mostly used to make iron.
It is converted to granulated blast furnace slag (GBFS) by quickly cooling molten slag with industrial water or steam. Granulated Blast Furnace Slag has a glassy structure and can be used as a fine aggregate or binder. GBFS is commonly used in the manufacture of blended cements and the ready-mix concrete plant where it is inter-ground or blended separately with cement usually at a 20% – 40% proportion. Unblended GBFS is can be used in road pavements and building products.
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