Ground Granulated Blast Furnace Slag | SpringerLink
Ground granulated blast furnace slag (GGBS) is a byproduct from the blastfurnaces used to make iron. Blastfurnaces are fed with controlled mixture of ironore, coke and limestone, and operated at a temperature of about 1,500°C. When ironore, coke and limestone melt in the blast furnace, two products are produced—molten iron, and molten slag.