纳米硅溶胶对水泥砂浆力学性能的影响及其作用机理初探
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- 英文论文题名：Effect of Nano-silica SOl on Mechanical Properties of Cement Mortar and the Action Mechanism
- 论文作者：张县云 ; 宋学锋 ; 高瑞
- 英文论文作者：ZHANG Xian-yun ; SONG Xue-feng ; GAO Rui ; College of Materials and Mineral Resources ; Xi'an University of Architecture and Technology
- 年：2014
- 作者机构：西安建筑科技大学材料与矿资学院;
- 论文关键词：硅溶胶 ; 水泥砂浆 ; 力学性能 ; 作用机理
- 英文论文关键词：silica sol ; cement mortar ; mechanical property ; action mechanism
- 会议召开时间：2014-11-01
- 会议录名称：2014年全国无机硅化物行业年会暨行业“十三五”发展规划研讨会论文集
- 语种：中文
- 分类号：TQ177.62;O648.16
- 学会代码：WJYG
- 会议名称：2014年全国无机硅化物行业年会暨行业“十三五”发展规划研讨会
- 会议地点：中国湖南长沙
- 主办单位：中国无机盐工业协会无机硅化物分会
- 学会名称：中国无机盐工业协会无机硅化物分会
- 页数：4
- 文件大小：390k
- 原文格式：O
- 会议级别：全国
摘要
在水泥基材料中掺人不同pH值的纳米硅溶胶,研究了其对水泥胶砂力学性能的作用规律,并通过XRD、SEM微观测试手段分析了硅溶胶中纳米SiO_2的火山灰活性及其对水泥石微观结构的影响。研究结果表明:酸性、中性及碱性硅溶胶在适当掺量下可提高水泥砂浆的力学性质、改善水泥石的微观结构:酸性和中性硅溶胶在碱性条件下极易团聚,纳米二氧化硅粒子的火山灰效应难以充分发挥,在最佳掺量下其对水泥砂浆的增强效果不及碱性硅溶胶。
By mixing the nano-silica sol with different pH values into cement-based material,its strengthen effect on the cement mortar was studied.With the XRD,SEM micro-test methods,the pozzolanic activity of nanoSiO_2 in the silica sol and its effect on the cement stone have been analysised.The results showed that acid,neutral and alkaline silica sol can enhance the strength of the cement mortar and improve the micro-structure of the cement stone with appropriate mixing amount.The acid and neutral silica sol are easily agglomerated in the alkaline condition,in this case the pozzolanic activity of the nano-SiO_2 patricale can not be completely stimulated developed,and have weaker enhancing effect on the strength of cement mortar compared to the alkaline silica sol.
By mixing the nano-silica sol with different pH values into cement-based material,its strengthen effect on the cement mortar was studied.With the XRD,SEM micro-test methods,the pozzolanic activity of nanoSiO_2 in the silica sol and its effect on the cement stone have been analysised.The results showed that acid,neutral and alkaline silica sol can enhance the strength of the cement mortar and improve the micro-structure of the cement stone with appropriate mixing amount.The acid and neutral silica sol are easily agglomerated in the alkaline condition,in this case the pozzolanic activity of the nano-SiO_2 patricale can not be completely stimulated developed,and have weaker enhancing effect on the strength of cement mortar compared to the alkaline silica sol.
引文