高性能纤维增强水泥基复合材料的力学性能试验研究  

Experimental study on the mechanical properties of high performance polyvinyl alcohol fiber reinforced cementitious composites

作　　者：刘界鑫 杨树桐[1] 

机构地区：[1]中国海洋大学工程学院土木工程系,山东青岛266100

出　　处：《混凝土》2015年第7期68-70,共3页Concrete

基　　金：国家自然科学基金资助项目(51378481);青岛市应用基础研究项目(13-1-4-250-jch)

摘　　要：采用聚乙烯醇纤维(Polyvinyl Alcohol,简称PVA纤维)制备高性能纤维增强水泥基复合材料(PVA-ECC),通过立方体抗压强度和梁四点弯曲试验分别研究不同PVA纤维体积掺入量、不同砂胶比以及粉煤灰掺入量对PVA-ECC材料的抗压强度与弯曲性能的影响。结果表明:随着纤维掺入量的增加PVA-ECC抗压强度逐渐降低,但弯曲延性增强。砂胶比的降低使得纤维更好的分散,延性效果得到明显改善。粉煤灰掺量的增加改善了PVA-ECC搅拌时的流动度,梁的抗弯承载力有所降低,但延性提高。High performance fiber-reinforced cement-based composites（PVA-ECC）were produced based on polyvinyl alcohol fi-bers（ PVA）. The influences of the fiber volume content,sand-binder ratio and fly ash contenton the compressive strength and bending performance of the PVA-ECC material by using cubic compression test and four-point bending test. The results show that the com-pressive strength gradually decreases with an increase in fiber volume content. But the ductility is improved. The lower sand-binder ra-tio can help to improve fiber dispersion,and the ductility is obviously improved. An increase in the fly ash content improves PVA-ECC mixing flowability,reduces the flexural strength,and increases the ductility.

关 键 词：纤维增强水泥基复合材料 抗压强度 荷载-扰度曲线 弯曲延性 

分 类 号：TU528.572[建筑科学—建筑技术科学]