为了比较沸石、纳米二氧化硅和稻壳灰这3种矿物外加剂对丁苯聚合物/水泥复合胶凝材料凝结硬化过程作用的差异,分别采用这3种矿物外加剂为调凝材料,并从凝结时间、早期强度、水化进程以及水化产物等角度比较3种矿物外加剂对丁苯聚合物/水泥复合胶凝材料的影响.结果表明,3种矿物外加剂都能促进复合胶凝材料的凝结硬化,大幅缩短凝结时间,提高早期强度.但3种矿物外加剂的调凝效果互不相同,调凝机理也有差异:沸石对A Ft的生成有较大的促进作用,它不仅能促进C3 A的水化,自身也能与Ca(OH)2反应生成AFt和CSH凝胶;而纳米二氧化硅和稻壳灰对C3 S水化的促进作用较强,自身也会与Ca(OH)2反应生成CS H凝胶.%In order to compare the influence of three kinds of mineral admixtures (zeolite ,nano-silica (NA) and rice husk ash (RHA)) on the setting and hardening process of styrene-butadiene copolymer/cement composite cementitious material ,the three kinds of mineral admixtures was used as set conditioning material respectively . The influence of the mineral admixtures on the composite cementitious material was compared from setting time ,early strength ,hydration process ,hydration products and so forth . The results showed that all the three kinds of mineral admixtures could promote the setting and hardening of the composite cementitious material . The setting time was shortened greatly and the early strength development was improved .But the set conditioning performance of the three kinds of mineral admixtures was different from each other . Moreover , there were some differences in setting conditioning mechanism :Zeolite had a great promoting effect on the formation of AFt ,it not only promoted the hydration reaction of C3A ,but also reacted with Ca(OH)2 to generate AFt and CSH gel ;NA and RHA had a strong promoting effect on the hydration of C3S ,it also reacted with Ca(OH)2 to generate CSH gel .
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