缓凝剂对高贝利特硫铝酸盐水泥水化和性能的影响  

Effects of Retarders on Hydration and Properties of High-Belite Calcium Sulphoaluminate Cement

作　　者：唐芮枫 王子明[1] 兰明章[1] 陈智丰 TANG Ruifeng;WANG Ziming;LAN Mingzhang;CHEN Zhifeng(School of Materials Science and Engineering,Beijing University of Technology,Beijing 100124,China;Tangshan Polar Bear Building Materials Co.,Ltd.,Tangshan 063705,China)

机构地区：[1]北京工业大学材料科学与工程学院,北京100124 [2]唐山北极熊建材有限公司,唐山063705

出　　处：《硅酸盐通报》2020年第12期3763-3769,共7页Bulletin of the Chinese Ceramic Society

基　　金：“十三五”国家重点研发计划(2016YFB0303504)。

摘　　要：高贝利特硫铝酸盐(HB-CSA)水泥是一种具有低收缩特性的新型低碳水泥。针对该种水泥凝结硬化不易控制的问题,系统研究了氨基三亚甲基膦酸(ATMP)和葡萄糖酸钠(SG)对HB-CSA水泥水化和凝结硬化的影响。采用等温量热仪、X射线衍射仪和扫描电子显微镜分析了缓凝剂在HB-CSA水泥中的作用机理。结果表明:ATMP可以显著延缓HB-CSA水泥水化进程,延长凝结时间,提高HB-CSA水泥的中后期强度;而SG仅表现出有限的作用。两种缓凝剂与聚羧酸减水剂(PCE)复配可以延迟HB-CSA水泥水化放热速率,抑制钙矾石等早期水化产物的形成,且不同种缓凝剂会使钙矾石呈现出不同的形貌。High-belite calcium sulphoaluminate(HB-CSA)cement is a new type of low-carbon cement with low shrinkage characteristics.Aiming at the problem that the setting and hardening of HB-CSA cement is difficult to control,the effects of two retarders,aminotri methylenephosphonic acid(ATMP)and sodium gluconate(SG),on the hydration and retardation response of HB-CSA cement were investigated.Each of the retarder compounded has a different effect on the early-age hydrate assemblage,as shown by quantitative X-ray diffraction,thermal conductivity isothermal calorimeter,scanning electron microscopy.The results show that ATMP significantly retards hydration of HB-CSA cement,prolongs the setting time,and improves HB-CSA cement mid-late strength,while the retardation effect of SG is limited.The combination of two retarders with PCE delays the hydration heat release rate differently to inhibit the early hydration product(ettringite)-forming reaction.Furthermore,the morphology of ettringite is altered depending on the type of retarder used.

关 键 词：高贝利特 硫铝酸盐水泥 氨基三亚甲基膦酸 葡萄糖酸钠 钙矾石 缓凝 

分 类 号：TQ172[化学工程—水泥工业]