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Study on performance of composite cement composed with slag and steel slag

WANG Shen-jin,LIU Jia-gen,ZHANG Shou-zhi Jiangsu BoTe New Materials Co.Ltd.,Nanjing 210008,Jiangsu,China  
The effect of the fineness and proportions of GGBS and steel slag on the mechanical properties of composite cement that composed with GGBS and steel slag were studied.The mechanism of GGBS and steel slag in composite cement from the view of particle accumulation and compound cementitious effect was discussed.The results showed that the fineness of GGBS controlled the strength of composite cement.The strength of composite cement would be increased with the specific surface area of GGBS increased.The strength of composite cement would be increased with the proportions of slag increased(compared with the content of the steel slag) when the mixing amount of supplementary cementitious materials remained unchanged.The 28d compressive strength of composite cement that composed with GGBS and steel slag would higher than pure cement,if an appropriate proportion had been kept.
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