| 碱矿渣复合胶凝材料固化Sr 2+的效率及机理 |
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| 引用本文： | 杨长辉,于泽东,陈雅蓉,陈科,王新.碱矿渣复合胶凝材料固化Sr 2+的效率及机理[J].土木建筑与环境工程,2013,35(5):125-131. |
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| 作者姓名： | 杨长辉 于泽东 陈雅蓉 陈科 王新 |
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| 作者单位： | 重庆大学 材料科学与工程学院，重庆 400045;重庆大学 材料科学与工程学院，重庆 400045;重庆大学 材料科学与工程学院，重庆 400045;重庆大学 材料科学与工程学院，重庆 400045;重庆大学 材料科学与工程学院，重庆 400045 |
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| 基金项目： | 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） |
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| 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Sr 2+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Sr 2+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Sr 2+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Sr 2+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Sr 2+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Sr 2+的固化效果逐渐增强。其原因为硅藻土对Sr 2+的吸附效果较好并能有效改善固化基体的微观结构。
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| 关 键 词： | 碱矿渣胶结材 固化 浸出率 |
Effection and Mechanisms of Composite Binders of Alkali-Activated Slag in Immobilizing of Sr 2+ |
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| Yang Changhui,Yu Zedong,Chen Yarong,Chen Ke and Wang Xin.Effection and Mechanisms of Composite Binders of Alkali-Activated Slag in Immobilizing of Sr 2+[J].土木建筑与环境工程,2013,35(5):125-131. |
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| Authors: | Yang Changhui Yu Zedong Chen Yarong Chen Ke and Wang Xin |
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| Affiliation: | College of Materials Science and Engineering, Chongqing University, Chongqing 400045, P.R China;College of Materials Science and Engineering, Chongqing University, Chongqing 400045, P.R China;College of Materials Science and Engineering, Chongqing University, Chongqing 400045, P.R China;College of Materials Science and Engineering, Chongqing University, Chongqing 400045, P.R China;College of Materials Science and Engineering, Chongqing University, Chongqing 400045, P.R China |
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| Abstract: | The effection of composite binders based on alkali-activated slag on the immobilization of Sr 2+ 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 Sr 2+ 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 Sr 2+ 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 Sr 2+ than that used NaOH as alkalis. In comparison to kaolin and zeolite minerals, binders contain diatomite has best effection on the immobilization of Sr 2+. Reasons lie in that diatomite has the highest ability on the adsorption of Sr 2+ and could improve microstructure of solified substrate effectively. |
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| Keywords: | Alkali-activated slag binder Solidification Leaching rate |
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