Hydrated hardened solids made from iron and steel slag were developed as a new material for civil engineering and construction in 1999.This material consists of steelmaking slag as an aggregate, ground granulated blast furnace slag (GGBFS) as a binder and fly ash as a mineral admixture.1 This technology makes it possible to build structures without using cement, thereby reducing CO_2 emissions associated with cement manufacturing and avoiding environmental destruction due to mining of virgin stone resources.
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