复合纤维组成优化及其混合料性能评价

发布时间：2018-06-20 10:46

本文选题：复合纤维 + 直剪试验　；参考：《北京工业大学学报》2016年02期

【摘要】：为了对复合纤维组成进行优化,按正交设计方案复配木质素纤维、聚酯纤维、玄武岩纤维组成9种复合纤维,并对各复合纤维改性沥青进行直剪试验,以抗剪强度为指标,通过极差、方差分析了各单纤维的影响作用,进而优选了复合纤维的最佳掺量及各组分最佳掺配比例;同时,通过室内试验比较验证了单纤维沥青混合料与复合纤维沥青混合料的路用性能.结果表明:复合纤维掺量为0.3%,木质素纤维、聚酯纤维、玄武岩纤维掺配比例为1:2:2时,复合纤维改性沥青具有最优的抗剪性能;复合纤维改性兼具各单纤维改性的优势,其混合料路用性能更加均衡,且具有良好的经济性,为路面材料改性技术提供了一种新的选择.
[Abstract]:In order to optimize the composition of composite fibers, nine kinds of composite fibers were made up of lignin fiber, polyester fiber and basalt fiber according to the orthogonal design scheme. The direct shear test of each composite fiber modified asphalt was carried out, and the shear strength was taken as the index. The influence of each single fiber was analyzed by means of range and variance, and then the optimum blending amount and the optimum proportion of each component of composite fiber were selected, at the same time, The road performance of single fiber asphalt mixture and composite fiber asphalt mixture is verified by laboratory test. The results show that when the blending ratio of lignin fiber, polyester fiber and basalt fiber is 1:2:2, the composite fiber modified asphalt has the best shear resistance, and the composite fiber modification has the advantages of single fiber modification. Its pavement performance is more balanced and has good economy, which provides a new choice for pavement material modification technology.
【作者单位】：长安大学公路学院;长安大学特殊地区公路工程教育部重点试验室;
【基金】：国家自然科学基金资助项目(51478046,51408050) 长安大学优秀博士学位论文培育资助项目(310821150015)
【分类号】：U414

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