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《Materials Review》 2015-18
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Study on Mechanical Properties of Organic Fiber and Polymer Composite-Modified Cements Mortar

YUAN Zongzheng;XU Fang;LIU Miao;DENG Xin;WANG Shuangchao;Faculty of Engineering,China University of Geosciences;  
Effect of content of styrene-butadiene latex and polyester fiber on the compressive and flexural strength,and the flexural/compression ratio mechanical properties of cement mortar at fixed water-cement ratio of0.35 were investigated.The test results show that addition of a certain volume content of single polyester fiber can improve compressive strength and flexural strength of the cement mortar in different degrees,the flexural-compression ratio increased with the increase of polyester fiber content showed a trend of increase after the first reduce.Singledoped polymer emulsion reduces the compressive of cement mortar,and the flexural-compression ratio shows a gradual increase with increase of polymer emulsion dosage.When polyester fiber and polymer emulsion mixed,compressive strength of polyester fiber concrete shows slightly lower,the flexural strength and flexural-compression ratio are both showing increase.When the fiber volume content is 0.1%,and the ratio of polymer is 15%,flexibility of modified cement concrete is best.Fiber-polymer can further improve its performance,and complex-doped effect is better than single-doped effect.The enhanced mechanism of polyester fiber and polymer emulsion on cement mortar properties was analyzed by scanning electron microscopy,indicating that the added polyester fiber and polymer emulsion could effectively fill the inside of the macro and micro defects,and improve the interfacial transition zone of compaction.
【Fund】: 国家自然科学基金(51308518);; 中央高校基本科研业务费专项资金(CUGL150412);; 中国地质大学(武汉)教学实验室开放基金
【CateGory Index】: TQ177.62
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