2008•Journal of Building MaterialsRequires access

Influence of Activators on the Properties of Steel Slag Cementitious Materials

Cheng Xin

Abstract

By adding small amount of composite activator in steel slag-blast furnace slag(BFS)-clinker system,high content of steel slag and high strength steel slag cementitious materials was successfully prepared.The effect of activators,the dosage of clinker and steel slag on the properties of steel slag cementitious materials was studied.Hydration products of the material and micro-structure of harden paste were investigated by SEM and XRD.The results show that the activity of steel slag is enhanced significantly and the early properties of the material is remarkably improved.The 3 d compressive strength is increased by 119.7% by the addition of activator.The species of hydration products of steel slag cementitious materials mortar are influenced slightly,but the content of C-S-H gel and AFt crystals is apparently higher than that in Portland cement mortar and the content of Ca(OH)_2 crystals is lower than that.

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Key concepts: Materials science, Cementitious, Ground granulated blast-furnace slag, Mortar, Compressive strength, Metallurgy, Cement, Slag (welding)