石灰石粉对水泥基材料水化动力学的影响  

Effect of Limestone Powder on Hydration Kinetics of Cement-Based Composites

作　　者：饶美娟[1] 刘数华[1] 方坤河[1] 宋军伟[1] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《建筑材料学报》2009年第6期734-736,741,共4页Journal of Building Materials

基　　金：中国博士后科学基金一等资助项目(20060400066)

摘　　要：利用TONI差分量热仪,测量了石灰石粉掺量分别为0,30%,50%(质量分数,下同)以及粉煤灰掺量为50%的水泥基材料水化放热速率和水化放热量曲线.运用动力学方法进行分析,得到了反应速率常数K,水化度α,反应级数N等动力学参数,并依此评价了石灰石粉对水泥基材料水化机理和水化过程的影响.结果表明,石灰石粉对水泥基材料的早期水化有促进作用,特别是当石灰石粉掺量为50%时,水化迅速由NG过程向I过程转变,影响尤为明显.Hydration exothermic rate and quantity of cement-based composites containing 0, 30% and 50 limestone powder and 50% fly ash were measured with TONI calorimeter. The reaction constant K, degree of hydration a and reaction exponent N can be calculated by using kinetic method, from which the mechanism of the hydration process can be known. The results show that limestone powder promotes early hydration of cement-based composites, especially when limestone powder content is 50%, hydration turns from NG progress to I progress rapidly.

关 键 词：水化动力学 石灰石粉 动力学参数 

分 类 号：TQ172.1[化学工程—水泥工业]