低水胶比下超细粉煤灰对不同细度硅酸盐水泥水化历程的影响  

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

作　　者：胡曙光[1] 耿健[1] 吕林女[2] 丁庆军[1] 王晓[1] 

机构地区：[1]武汉理工大学硅酸盐材料工程教育部重点实验室,湖北武汉430070 [2]武汉理工大学理学院,湖北武汉430070

出　　处：《水泥》2005年第1期6-8,共3页Cement

基　　金：国家重点基础研究发展项目规划(973)项目(2001CD610704-2)

摘　　要：从强度、结合水、粉煤灰反应程度、SEM分析及孔隙溶液碱度等方面,研究了低水胶比下超细Ⅱ级粉煤灰对不同细度硅酸盐水泥水化历程的影响。研究结果表明,水泥细度从4500cm2/g提高到5500cm2/g,对纯水泥水化过程影响不大。但当该高细度水泥与超细II级粉煤灰复合时,则对水泥及粉煤灰的水化程度、水化产物特性、孔隙溶液碱度以及力学性能均影响较大;随粉煤灰掺量的增加,其影响程度呈由小变大再变小的趋势,粉煤灰掺量存在阈值,本试验中,阈值为30%。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%.

关 键 词：液碱 低水胶比 水泥细度 超细粉煤灰 水化程度 硅酸盐水泥 水泥水化 粉煤灰掺量 水化产物 结合水 

分 类 号：TQ172[化学工程—水泥工业] TU528[化学工程—硅酸盐工业]