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Alkali activation of synthetic gamma di calcium silicate with pure calcined natural clays

Book Contribution - Book Chapter Conference Contribution

Stainless steel slag such as Argon Oxygen Decarburization (AOD) and continuous casting (CC) slag are crystalline in nature and primarily rich in gamma di-calcium silicate (Υ-C2S), which has poor hydraulic properties. Therefore, the use of these slags as a hydraulic binder is unfavourable in building materials. Recent study1 has examined the effectiveness of mechanical and chemical activation of Υ-C2S; these activations increased the hydraulic reactivity of Υ-C2S and transformed it into a reactive hydraulic component. The aim of this investigation is to transform the synthetic Υ-C2S into a single reactive binder system by mixing it with pure calcined natural clays such as kaolinite, Na- and Ca- montmorillonite and to study the effect of using clays on the hydraulic properties. Using pure calcined natural clays as a source of aluminosilicate promotes the formation of three dimensional aluminosilicate network of zeolite, which gives the binding property to the binder.
Book: International Slag Valorisation Symposium
Pages: 365 - 368
ISBN:9789090302942
Publication year:2017