溶胶-凝胶法制备的铝酸三钙早期水化特性  

Research on the Early Hydration Properties of C_3A Prepared by Sol-Gel Method

作　　者：陈红霞[1] 王培铭[1] 赵红[1] 

机构地区：[1]同济大学混凝土材料研究国家重点实验室,上海200092

出　　处：《建筑材料学报》2003年第3期227-230,共4页Journal of Building Materials

基　　金：国家自然科学基金资助项目(59478051);高等学校博士学科点专项基金资助项目(1999024707);国家重点基础研究发展规划项目(2001610704)

摘　　要：研究了以溶胶-凝胶法制备的铝酸三钙在水中的早期水化特性.用水化微量热仪测量该水化产生的热量和放热速率,用X射线衍射无标样定量法测定不同水化龄期的水化程度,用X射线荧光分析仪滤纸片法测定水化溶液中的离子浓度.结果表明:用溶胶-凝胶法制备的C3A在与水接触的几分钟内,其水化速率很快,水化程度达70%以上,且水化产物以C3AH6为主.The early hydration properties of tricalcium aluminate prepared by solgel method in pure water was discussed. The hydration heat and its rate were determined by the isothermal calorimeter. The degrees of hydration in different time were analyzed quantitatively by the Xray phase analysis without standards. The ion concentration of the hydration solution was determined with filter method by Xray fluorescence analyzer. The results show that in the first few minutes, the hydration rate of the C3A prepared by solgel method is very fast and the hydration degree is up to 70%. C3AH6 is the main hydration product in the early period.

关 键 词：溶胶一凝胶法 铝酸三钙 水化 离子浓度 X射线衍射 

分 类 号：TQ172.12[化学工程—水泥工业]