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《Cement》 2005-01
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Effect of super fine class II fly ash on the hydration process of Portland cement with different fineness under low water-binder ratio

HU Shu-guang,GENG Jian,LV Lin-nü Education of Silicate Material and Science and Engineering of Wuhan University of Technology,Wuhan,430070  
The effect of superfine class II fly ash on the hydration proceeding of different fineness Portland cement under the condition of low water-binder ratio through the aspects of strength, binding water, reaction degrees of fly ash, SEM, alkalinity of pore solution and so on. The results showed that it hadn't obvious influences on hydration of pure cement when its fineness increased from 4 500cm2/g to 5 500cm2/g. When mixed with the high fineness cement and super fine fly ash, it significantly influenced the reaction degrees of cement and fly ash, the characteristics of hydration, alkalinity of pore solution and mechanic properties; The influencing degrees showed relative lower, then to the highest point, later decreased to lower spot as the increasing dosage of fly ash. The dosage of fly ash shows a peak value, in this paper, the threshold value is 30%.
【Fund】: 国家重点基础研究发展项目规划(973)项目(2001CD610704-2)
【CateGory Index】: TQ172.44
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