文章摘要
王茹,张绍康,王高勇.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的影响及机制[J].材料导报,2017,31(24):69-73, 95
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的影响及机制
Influence and Mechanism of Mineral Admixtures on Setting and Hardening of Styrene-Butadiene Copolymer/Cement Composite Cementitious Material
  
DOI：10.11896/j.issn.1005-023X.2017.024.014
中文关键词: 水泥 丁苯聚合物 沸石 纳米二氧化硅 稻壳灰 凝结硬化
英文关键词: cement, styrene-butadiene copolymer, zeolite, nano-silica, rice husk ash, setting and hardening
基金项目:国家自然科学基金(51572196;51202162)；中德科学中心资助项目(GZ1290)
作者单位
王茹 同济大学材料科学与工程学院,先进土木工程材料教育部重点实验室,上海 201804 
张绍康 同济大学材料科学与工程学院,先进土木工程材料教育部重点实验室,上海 201804 
王高勇 同济大学材料科学与工程学院,先进土木工程材料教育部重点实验室,上海 201804 
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中文摘要:
      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AFt的生成有较大的促进作用,它不仅能促进C3A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C3S水化的促进作用较强,自身也会与Ca(OH)2反应生成CSH凝胶。
英文摘要:
      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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