水泥熟料和粉煤灰的定量表征与研究  

Quantitative characterization and research of cement material and fly ash

作　　者：李然[1] LI Ran(College of Engineering and Technology,Chengdu University of Technology,Leshan 614000,China)

机构地区：[1]成都理工大学工程技术学院,四川乐山614000

出　　处：《混凝土》2020年第5期53-55,共3页Concrete

基　　金：国家自然科学基金(51379138)。

摘　　要：胶凝水泥材料粉煤灰对复合胶凝体系中铝酸钙和铁铝酸钙水化程度有着较大的影响,通过微观测试方法和理论得出:一元胶凝体系C中C3A在90 d的水化龄期内其水化程度均高于C4AF的水化程度,而硅灰的加入并不改变这一趋势;硅灰的加入明显加速了C3A前一天的水化,其水化程度从0.51(在C体系中)加速到了0.57(在C-SF体系中);C-SF体系中CH的饱和度指数在3 d后开始迅速下降为负值,而C-SF中的Al(OH)4-浓度在3~7 d时出现轻微的增长后,开始迅速下降直至28 d。Fly ash of cementitious cement material has great influence on the hydration degree of calcium aluminate and calcium ferrialuminate in composite cementitious system.Through micro-test method and theory,it is concluded that the hydration degree of C3A in mono-cementitious system C is higher than that of C4AF within 90 days of hydration age,and the addition of silica fume does not change this trend.The addition of silica fume accelerates the hydration degree of C3A significantly the day before.The degree of hydration accelerated from 0.51(in C system)to 0.57(in C-SF system).The saturation index of CH in C-SF system began to decrease rapidly to negative value after 3 days,while the concentration of Al(OH)4- in C-SF increased slightly from 3 days to 7 days,then began to decrease rapidly until 28 days.

关 键 词：水泥 粉煤灰 硅灰 表征 

分 类 号：TU528.041[建筑科学—建筑技术科学]