含钡硫铝酸盐水泥的水化动力学与热力学研究  

Study on Kinetics and Thermodynamics of Hydration of Ba-bearing Sulphoaluminate Cement

作　　者：徐冠立[1] 孙遥[1] 林金辉[2] 

机构地区：[1]成都理工大学地球科学学院,成都610059 [2]成都理工大学材料与化学化工学院,成都610059

出　　处：《材料导报》2013年第12期126-130,共5页Materials Reports

基　　金：财政部矿山保护专项基金(2007-244);矿物学;岩石学;矿床学国家重点(培育)学科建设项目(SZD0407)

摘　　要：采用XRD和等温微量热法测试计算含钡硫铝酸盐水泥的水化动力学和热力学过程。结果表明,含钡硫铝酸盐水泥的水化过程主要受扩散过程控制,水化速率变化模式与铝酸钙、硅酸盐水泥类似。水化过程分为加速期、减速期和衰减期:在加速期,水化反应受成核反应控制,属自催化反应;从减速期开始,水化物在颗粒表面形成水化物薄膜,水化反应阻力加大,速率减缓;进入衰减期,水化反应完全受扩散过程控制。Kinetics and thermodynamics of Ba-bearing sulphoaluminate cement hydrate reaction had been studied by XRD and isothermal calorimetry methods. The results showed that the rate of the hydration is diffusionally controlled, and its pattern is similar to tri-calcium aluminate and Portland cement. The hydration process could be divided into acceleration, deceleration and decay stages. The hydration is nucleation controlled at acceleration stage which means the reaction is autocatalytic. At deceleration stage, after layers of hydrate develops on the clinker particles causing the increasing obstruction, hydration rate decrease, and finally become controlled totally by diffusion at decay stage.

关 键 词：含钡硫铝酸盐水泥 水化动力学 水化热力学 

分 类 号：TQ172.11[化学工程—水泥工业]