不同类型纤维对AC-20沥青混合料性能的影响  

Effects of Different Types of Fibers on the Performance of AC-20 Asphalt Mixture

作　　者：薛金顺 蒋应军[2] XUE Jinshun;JIANG Yingjun(School of Civil Engineering and Architecture,Hubei University of Arts and Science,Xiangyang 441053;Key Laboratory for Special Area Highway Engineering of Ministry of Education,Chang'an University,Xi'an 710064)

机构地区：[1]湖北文理学院土木工程与建筑学院,湖北襄阳441053 [2]长安大学特殊地区公路工程教育部重点实验室,西安710064

出　　处：《公路交通技术》2022年第4期6-11,共6页Technology of Highway and Transport

基　　金：湖北省自然科学基金项目(2020CFB330);河南省交通科技项目(2013K34)。

摘　　要：为分析不同类型纤维对AC-20沥青混合料性能的影响规律,基于稳定度试验、抗剪强度试验以及劈裂强度试验,研究了不同纤维掺量对AC-20沥青混合料高低温性能的影响规律,推荐了不同类型纤维的最佳掺量,并对比分析了不同纤维类型对沥青混合料力学性能的影响。结果表明:随着纤维掺量增加,不同类型纤维AC-20沥青混合料力学性能均呈现先增大后减小的趋势,矿物纤维、木质素纤维和聚酯纤维最佳掺量分别为0.3%、0.5%、0.2%;与未掺加纤维沥青混合料相比,最佳纤维掺量下矿物纤维、木质素纤维和聚酯纤维AC-20沥青混合料的稳定度分别可提升7%、4%、5%,抗剪强度分别可提升15%、8%、13%,劈裂性能分别可提升14%、9%、12%。In order to analyze the influence of different types of fibers on the performance of AC-20asphalt mixture,the influence of different fiber content on the high and low temperature performance of AC-20 asphalt mixture based on Marshall stability test,shear strength test and splitting strength test was studied,and the optimum content of different types of fibers was recommended.Then,the effects of different fiber types on the mechanical properties of asphalt mixture are compared and analyzed.The results show that with the increase of fiber content,the mechanical properties of different types of fiber AC-20asphalt mixture increase at first and then gradually decrease,which mixed with 0.3%basalt fiber or 0.5%wood fiber or 0.2%polyester fiber respectively has optimum mechanical properties.Compared with the asphalt mixture without fiber,the Marshall stability of AC-20 asphalt mixture with optimum content of basalt fiber,wood fiber and polyester fiber can be improved by 7%,4%and 5%respectively,the shear strength can be improved by 15%,8%and 13%respectively,and the splitting strength can be improved by 14%,9%and 12%respectively.

关 键 词：道路工程 沥青混合料 矿物纤维 木质素纤维 聚酯纤维 力学性能 

分 类 号：U414[交通运输工程—道路与铁道工程]