硫铝酸盐水泥水化反应的表观活化能计算  

Determination of Apparent Activation Energy of Hydration Reaction of Calcium Sulfoaluminate Cement

作　　者：廖宜顺[1] 桂雨[1] 沈晴 袁正夏 LIAO Yishun;GUI Yu;SHEN Qing;YUAN Zhengxia(School of Urban Construction,Wuhan University of Science and Technology,Wuhan 430065,China)

机构地区：[1]武汉科技大学城市建设学院,湖北武汉430065

出　　处：《建筑材料学报》2018年第6期864-870,共7页Journal of Building Materials

基　　金：国家自然科学基金资助项目(51608402);湖北省自然科学基金资助项目(2015CFB353)

摘　　要：基于Arrhenius公式,通过测定不同养护温度(20,30,40,50℃)下硫铝酸盐水泥浆体的水化热,利用指数法和线性双曲法分别计算其水化反应的表观活化能,同时研究了硅灰和高钙粉煤灰对硫铝酸盐水泥水化反应表观活化能的影响.结果表明:采用指数法和线性双曲法计算得出的硫铝酸盐水泥水化反应的表观活化能分别为45.54,55.44kJ·mol-1;在所测试的所有试样中,采用指数法计算所得的表观活化能均低于采用线性双曲法计算所得之值;采用2.5%,5.0%硅灰或40.0%高钙粉煤灰等质量替代水泥后,硫铝酸盐水泥复合体系的表观活化能增大,但以20.0%高钙粉煤灰等质量替代水泥后,该体系的表观活化能降低.Based on Arrhenius equation,the apparent activation energy of calcium sulfoaluminate cement pastes were calculated from the heat of hydration cured at temperatures of 20,30,40,50℃.The apparent activation energy of hydration reaction was calculated by exponential method and linear hyperbolic method,respectively.Meanwhile,the influence of high calcium fly ash and silica fume on the apparent activation energy of hydration reaction of calcium sulfoaluminate cement pastes were also investigated.The results show that the apparent activation energy of calcium sulfoaluminate cement calculated by exponential method and linear hyperbolic method is 45.54 and 55.44 kJ·mol-1 respectively.By comparisons,the apparent activation energy calculated by exponential method is lower than that of the linear hyperbolic method in all samples.In addition,the apparent activation energy of cement composite system increases when the cement mix with 2.5%,5.0%silica fume or 40.0%high calcium fly ash,but with the addition of 20.0%high calcium fly ash in the composite system,the apparent activation energy of the cement composite system decreases.

关 键 词：表观活化能 硫铝酸盐水泥 高钙粉煤灰 硅灰 水化热 

分 类 号：TQ172[化学工程—水泥工业]