活化煤矸石在水泥基材料中的早期水化动力学研究  

Early Hydration Kinetics Research of Calcined Coal Gangue in Cement-Based Materials

作　　者：陈杰[1,2] 水中和[1,3] 孙涛 高旭[1] 宋秋磊[1,2] 国诚 CHEN Ji;SHUI Zhoog-he;SUN Tao;GAO Xu;SONG Qiu-lei;GUO Cheng(State Key Laboratora of Silicate Materials for Architectures,Wuhan University of Technolovy,Wuhan 430070,China;School of Mateeals Science and Engineering,Wuhan University of Technolovy,Wuhan 430070,China;Wuhan University of Technology Advvnced Engineeeng Technology Research Institute of Zhongshan City,Zhongshan 528400,China)

机构地区：[1]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070 [2]武汉理工大学材料科学与工程学院,武汉430070 [3]中山市武汉理工大学先进工程技术研究院,中山528400

出　　处：《硅酸盐通报》2019年第7期1983-1990,共8页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(51608409);广东省扬帆计划(201312C12);广东省中山市重大科技专项(2017A1021)

摘　　要：采用活化煤矸石(CCG)部分取代波特兰水泥的方式,对比研究了CCG对CCG-水泥复合胶凝材料的凝结时间、力学性能和水化热反应等的影响。利用水化热法研究了CCG-水泥复合胶凝体系的水化特性;并基于Krstulovic-Dabic模型,分析了CCG-水泥复合胶凝体系的水化反应机理。试验结果表明,活化煤矸石取代硅酸盐水泥熟料的最佳掺量为30%,此掺量下,能保证良好的力学性能与工作性能;CCG对CCG-水泥复合胶凝材料的早期水化无明显影响,后期活化煤矸石中的铝相、硅相会与氢氧化钙反应发生火山灰效应;活化煤矸石能增大水泥水化结晶成核与晶体生长(NG)、相边界反应(I)过程的反应程度并降低扩散(D)阶段的反应程度;同时能降低NG、I过程的反应速率,并在不高于30%的掺量下,对D过程的反应速率有一定的增强作用。The effects of calcined coal gangue (CCG) on setting time,mechanical properties and hydration heat release of cement-based materials were studied. The hydration characteristics of CCG Portland cement system was evaluated by hydration heat method. Based on the Krstulovic-Dabic hydration kinetics model,the hydration reaction mechanisms were analyzed. The results show that the optimum substitution of CCG in Portland cement system is 30%. Below this proportion,appropriate mechanical properties and working performance can be maintained. CCG has limited influence on the early hydration of cement-based materials,and pozzolanic reaction occurs in later stages between calcium hydroxide and CCG.Meanwhile,CCG can increase the reaction degree of nucleation and growth process(NG) and phase boundary interaction process and reduce the reaction degree of diffusion process(D) of cement hydration. CCG can reduce the reaction rate of NG and I stages and it can promote the D stage when its content is not higher than 30%.

关 键 词：活化煤矸石 凝结时间 力学性能 水泥水化 水化动力学 Krstulovic-Dabic模型 

分 类 号：TQ172[化学工程—水泥工业]