A new kind of eco-cement made of cement kiln dust and granular blast furnace slag

Abstract

A research project was conducted to manufacture eco-cement for sustainable development using cement kiln dust (CKD) and granular blast furnace slag(GBFS). In the project, the burning process and mineral compositions of CKD clinker were investigated. Different mineralizers such as CaSO₄ and CaF₂ sulfur and alkali content were considered. The strength of CKD and GBFS eco-cement were evaluated. The results indicate the CKD clinker can not only form ordinary cement clinker minerals such as C₃S, C₂S and C₄AF, but also form such high-reactive minerals as C₄ A₃ S and C₁₁ A₇, · CaF₂. The CKD and GBFS eco-cement will have the similar strength to the Portland cement grade 32.5 when blend proportion is properly applied.

Keywords

cement kiln dust / eco-cement / burnability / mineral composition

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