摘要
通过氯盐环境中的快速冻融试验研究了纤维体积率、冻融循环次数、粉煤灰、硅粉对聚乙烯醇(PVA)纤维水泥基复合材料抗盐冻性能的影响。通过扫描电镜观察内部微观结构随盐冻作用的变化规律、PVA纤维在水泥基体中分布情况和界面结合状况。试验结果表明:PVA纤维的掺入可明显改善水泥基复合材料的抗盐冻性能;PVA纤维在基体中分散性较好,且与水泥基体界面结合状况较好;而粉煤灰、硅粉的掺入未明显改善PVA纤维水泥基复合材料的抗盐冻性能。
The effects of the fiber volume ratio,the freezing-deicing cycle number,the coal fly ash,and the silicon powder on the resistance against deicing salt of the polyvinyl alcohol（PVA） fiber reinforced cementitious composite were investigated by the accelerated preezing-deicing cycle test under the chloride environment.The change of the microstructure along with the action of the chloride and the freezing-deicing,the distribution of the PVA fiber in the cement matrix and the interface binding were observed by a scan electronic microscope.The test result show that adding PVA fiber into cement improves significantly the freezing-deicing resistance of the cementitious composite under the chloride environment.The PVA fiber is well distributed in the matrix and well bound with the cement in the interface.Adding the coal fly ash or silicon powder do not much improve the deicing salt resistance of the composite.
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2012年第1期63-67,共5页
Journal of Jilin University:Engineering and Technology Edition
基金
国家自然科学基金项目(50968011)
教育部春晖计划基金项目(Z2004-2-15026)
内蒙古自然科学基金项目(2009MS0716)
关键词
土木建筑工程
聚乙烯醇纤维
水泥基复合材料
氯盐环境
抗盐冻性能
扫描电子显微镜
civil architectural engineering
polyvinyl alcohol（PVA） fiber
cementitious composite
chloride condition
decing salt resistance
scan electronic microscope
