聚乙烯醇纤维强化水泥基复合材料的抗盐冻性能

吉林大学学报(工学版) ›› 2012, Vol. 42 ›› Issue (01): 63-67.

聚乙烯醇纤维强化水泥基复合材料的抗盐冻性能

刘曙光¹, 闫敏¹, 闫长旺¹, 郭荣跃²

1. 内蒙古工业大学矿业学院, 呼和浩特 010051;
2. 中铁六局集团呼和浩特铁路建设公司, 呼和浩特 010050

收稿日期:2010-07-23 出版日期:2012-01-01 发布日期:2012-01-01
作者简介:刘曙光(1960-),男,教授.研究方向:纤维混凝土.E-mail:liusg6011@126.com
基金资助:
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).

Deicing salt resistance of PVA fiber reinforced cementitious composite

LIU Shu-guang¹, YAN Min¹, YAN Chang-wang¹, GUO Rong-yue²

1. College of Mines, Inner Mongolia University of Technology, Hohhot 010051,China;
2. China Railway Sixth Group, Hohhot Railway Construction Co.Ltd, Hohhot 010050, China

Received:2010-07-23 Online:2012-01-01 Published:2012-01-01

摘要/Abstract

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。

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

Abstract:

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.

Key words: civil architectural engineering, polyvinyl alcohol(PVA) fiber, cementitious composite, chloride condition, decing salt resistance, scan electronic microscope

中图分类号:

TU375.4

刘曙光, 闫敏, 闫长旺, 郭荣跃. 聚乙烯醇纤维强化水泥基复合材料的抗盐冻性能[J]. 吉林大学学报(工学版), 2012, 42(01): 63-67.

LIU Shu-guang, YAN Min, YAN Chang-wang, GUO Rong-yue. Deicing salt resistance of PVA fiber reinforced cementitious composite[J]. 吉林大学学报(工学版), 2012, 42(01): 63-67.

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