适应于碱激发碳酸盐矿-矿渣胶凝材料的缓凝剂研究  

Research on Retarder Available for Alkali Activated Carbonatite-Slag Cementitious Material

作　　者：乔飞[1] 余其俊[1] 赵三银[1] 黄家琪[1] 殷素红[1] 文梓芸[1] 

机构地区：[1]华南理工大学材料科学与工程学院

出　　处：《长江科学院院报》2007年第1期36-39,43,共5页Journal of Changjiang River Scientific Research Institute

基　　金：国家高技术研究发展计划项目(2002AA335050);国家自然科学基金项目(50409011)

摘　　要：研究了一些常用于碱矿渣水泥的缓凝剂,如硝酸铅、硝酸锌和氯化钠等对碱激发碳酸盐矿-矿渣胶凝材料凝胶时间的影响。结果表明:硝酸铅、硝酸锌在掺量大于3%时可以延长凝胶时间;氯化钠、硼酸钠可延长凝胶时间,但延长幅度小。研究发现外加剂BS对碱激发碳酸盐矿-矿渣胶凝材料具有很好的缓凝效果,可使浆体保持良好的流动性能,且有利于胶砂体强度性能的提高,其缓凝机理为BS与水玻璃快速反应并在矿渣表面形成一层保护膜。The effect of some chemical retarders, often used for alkali-activated cement such as Pb（NO3）2, Zn（NO3）2, and NaCl etc., on the gelation time of alkali-activated carbonatite-slag cementitious material （AACSCM） was investigated. The results are as follows： Pb（NO3）2 or Zn（NO3）2 has retarding effect when its addition is not less than 3 % of blast-furnace slag, and for NaCl or Na2B7O4 the addition should not be less than 8 % ; chemical reagent BS can efficiently retard the gelation of AACSCM paste and improve the strength of AACSCM mortars. In addition, the fluidity of AACSCM paste can be kept constantly for 4 hours. The retarding effect of BS is mainly attributed to the formation of a protective layer on the surface of slag grain clue to the reaction between BS and water glass.

关 键 词：碱激发胶凝材料 碳酸盐矿 矿渣 缓凝剂 

分 类 号：TQ177.6[化学工程—硅酸盐工业]