路面PE纤维混凝土韧性和耐磨耗性试验研究

发布时间：2018-01-10 00:21

本文关键词：路面PE纤维混凝土韧性和耐磨耗性试验研究　出处：《公路交通科技》2015年04期 　论文类型：期刊论文

【摘要】：从提高混凝土路面韧性和耐磨耗性出发,分析了不同体积掺量(0,0.5%,1%)聚乙烯纤维和不同取代量(0,30%,50%)粉煤灰对混凝土弯拉强度、弯韧度指数、裂后强度以及耐磨耗性的影响。结果表明:聚乙烯纤维对弯拉强度和韧度的贡献较大;试件FFFO弯韧度指数比FFFZ高1.8倍;高掺粉煤灰(50%)和聚乙烯纤维(体积分数为1%)组合的28 d强度满足公路设计要求;聚丙烯纤维与粉煤灰(30%)的组合对耐磨耗性贡献最大;耐磨耗性随纤维掺量的增多而增强,与纤维掺量有二次函数的关系;纤维掺量对弯韧度指数和裂后强度的影响有相同的倾向。
[Abstract]:In order to improve the toughness and wear resistance of concrete pavement, the paper analyzes 30% of polyethylene fiber and different substitution amount of polyethylene fiber with different volume content of 0. 5% and 0. 5%. 50) the effect of fly ash on flexural tensile strength, flexural toughness index, post-crack strength and wear resistance of concrete. The results show that polyethylene fiber has a great contribution to flexural strength and toughness. The bending toughness index of FFFO is 1.8 times higher than that of FFFZ. The 28d strength of high blending fly ash and polyethylene fiber (volume fraction is 1) meets the requirements of highway design; The combination of polypropylene fiber and fly ash 30) has the greatest contribution to wear resistance. The wear resistance increases with the increase of fiber content and has a quadratic function relationship with fiber content. The effect of fiber content on flexural toughness index and post-crack strength has the same tendency.
【作者单位】：内蒙古大学交通学院;
【基金】：内蒙古自然科学基金博士基金项目(2010BS0709) 内蒙古大学高层次人才引进项目(209213)
【分类号】：U414;U416.216
【正文快照】： 0引言水泥混凝土路面的结构破坏形式主要表现为裂缝、断板、断角,除了基层支撑条件外,这些破坏还与混凝土材料自身的特性有关。普通混凝土是一种刚度很大的脆性材料,其抗压强度很高,而抗拉、弯拉强度较低,弹性模量很大,脆性系数大,对各种变形的容限很小,极易产生裂缝[1-5],达

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