碱矿渣复合胶凝材料固化Sr^(2+)的效率及机理  

Effection and Mechanisms of Composite Binders of Alkali-Activated Slag in Immobilizing of Sr^2+

作　　者：杨长辉[1] 于泽东[1] 陈雅蓉[1] 陈科[1] 王新[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400045

出　　处：《土木建筑与环境工程》2013年第5期125-131,共7页Journal of Civil,Architectural & Environment Engineering

基　　金：国际科技合作计划项目(科技部)(国发2009-612);教育部博士点基金(20120191120056);重庆大学中央高校基本科研业务费(CDJZR12130041);重庆大学大型仪器设备开放基金(2013063010)

摘　　要：通过浸出率试验、SEM及吸附试验,研究了碱矿渣复合胶凝材料固化Sr2+的效率,分析其固化机理。结果表明,碱矿渣复合胶凝材料固化Sr2+的效率受碱种类、碱当量以及矿物掺合料的影响。在3.0%~6.0%范围内,随着碱当量的增加,碱矿渣复合胶凝材料固化Sr2+的效率逐渐提高;Na2O当量相同时,水玻璃作碱组分的胶凝材料固化Sr2+的效率优于NaOH作碱组分的胶凝材料;硅藻土部分替代矿渣所得胶凝材料固化Sr2+的效果优于高岭土、沸石粉,且随着硅藻土掺量的增加,固化基体对Sr2+的固化效果逐渐增强。其原因为硅藻土对Sr2+的吸附效果较好并能有效改善固化基体的微观结构。The effection of composite binders based on alkali-activated slag on the immobilization of Sr2＋ were investigated and mechanisms were analyzed, by way of leaching test, SEM and adsorption test. Results show that the ability of the composite binders on the immobilization of Sr2＋ are influenced by the type and amount of alkalis as well as type of mineral admixtures. The effection of the composite binder on the immobilization of Sr2＋ increased with amount of alkalis increased in the range of 3.0% to 6.0% （count as Na2O equivalent）. The binder used water glass as alkalis performed better effection on the immobilization of Sr2＋ than that used NaOH as alkalis. In comparison to kaolin and zeolite minerals, binders contain diatomite has best effection on the immobilization of Sr2＋. Reasons lie in that diatomite has the highest ability on the adsorption of Sr2＋ and could improve microstructure of solified substrate effectively.

关 键 词：碱矿渣胶结材 固化 浸出率 

分 类 号：TU528[建筑科学—建筑技术科学]