电学方法研究水泥水化诱导期  

Study on Induction Period of Cement Hydration by Electrical Method

作　　者：曾晓辉[1,2] 谢友均[1] 隋同波[2] 李宗津[3] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075 [2]中国建筑材料科学研究总院,北京100024 [3]香港科技大学土木工程系

出　　处：《建筑材料学报》2009年第2期132-135,共4页Journal of Building Materials

基　　金："十一五"国家科技支撑计划重大项目(2006BAJ03A09);国家自然科学基金资助项目(50678174)

摘　　要：用电学方法研究了波特兰水泥的水化诱导期.测定了不同水化时间波特兰水泥浆体的电阻率、钙离子浓度、氢氧化钙含量和氢氧化钙分解温度,并结合水泥水化放热速率,讨论了水泥的各水化阶段.研究结果表明:水泥水化时,浆体电阻率变化表现出一定的规律性;电阻率最小值至电阻率开始加速上升之间的时间即为水泥水化反应的诱导期,诱导期的开始和结束都与氢氧化钙的生长有关.Based on the change of resistivity during hydration the induction period of Portland cement hydration was studied.By testing the paste＇s Ca^2＋ concentration,electrical resistivity,mass fraction and decomposition temperature of calcium hydroxide as well as the hydration heat at different hydration time, the various periods of cement hydration were studied.Results show that the change of the electrical resistivity of the paste exhibits certain regularity,and the time between the minimum resistivity and the resistivity at which rapid increase begins can be taken as the induction period.Moreover,both the beginning and the end of induction period are related to the growth of calcium hydroxide.

关 键 词：波特兰水泥 诱导期 水化 电阻率 

分 类 号：TU528.0[建筑科学—建筑技术科学]