聚乙烯醇纤维强化水泥基复合材料的抗盐冻性能

Abstract

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

CLC Number:

TU375.4

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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Deicing salt resistance of PVA fiber reinforced cementitious composite

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