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Indexed by:会议论文

Date of Publication:2011-06-18

Included Journals:EI、CPCI-S、Scopus

Volume:250-253

Issue:1-4

Page Number:870-874

Key Words:eco-cement; GGBS; seed crystal; sintering temperature; strength

Abstract:Eco-cement produced from waste concrete was proved to be feasible in early research. The seed crystal of ground granulated blast furnace slag (GGBS) was utilized in this research to lower the sintering temperature of eco-cement clinker. The mineral compositions of clinker with GGBS seed crystal was analyzed by X-ray diffraction (XRD), and the mechanical properties of eco-cement with GOBS seed crystal was also tested. Four main cement minerals were all observed in eco-cement clinker and the compressive strength of the eco-cement pastes can approach to about 66 MPa at 28 curing days. The results showed that GOBS seed crystal was favourable for the formation of cement minerals at a lower temperature. It can help reduce by about 50 similar to 100 degrees C for the sintering process of cement clinker. Content of GGBS seed crystal should better be in the rage of 5%similar to 8%, and the suitable sintering temperature should be 1350 degrees C.