聚合物纤维和玻璃对沥青混合料力学性能的影响  

Influence of Polymer Fiber and Glass on the Mechanical Properties of Asphalt Mixture

作　　者：宋文佳[1] SONG Wen-jia(Institute of Technology,Xi’an International University,Xi’an 710077,China)

机构地区：[1]西安外事学院工学院,西安市710077

出　　处：《公路》2021年第8期29-33,共5页Highway

基　　金：陕西省教育厅专项基金项目,项目编号19JK0729。

摘　　要：废旧玻璃代替部分集料在减少道路建设对自然资源消耗的同时,还影响沥青混合料的力学性能。为提高掺有玻璃集料的沥青混合料的力学性能,在沥青混合料中添加聚丙烯纤维,通过标准马歇尔试验、间接拉伸刚度模量试验和动态蠕变试验研究了聚丙烯纤维和玻璃对沥青混合料力学性能的影响。结果表明:在一定掺量范围内聚丙烯纤维或玻璃单独掺加均可提升沥青混合料稳定度,二者对沥青混合料的稳定度最大提升效果分别为11.29%和12.10%。沥青混合料间接拉伸刚度模量与玻璃掺量正相关,但随聚丙烯纤维掺量的增加而先增加后降低,0.2%为聚丙烯纤维最佳掺量;在聚丙烯纤维掺量为0.2%时,玻璃最佳掺量为6%。Replacing part of the aggregate with waste glass can affect the mechanical properties of the asphalt mixture though it can reduce the consumption of natural resources in road construction.In order to improve the mechanical properties of asphalt mixtures mixed with glass aggregates,polypropylene fibers is added to the asphalt mixtures.Through standard Marshall test,indirect tensile stiffness modulus test and dynamic creep test,the influence of polypropylene fiber and glass on the mechanical properties of asphalt mixture is studied.The results show that adding polypropylene fiber or glass only within a certain content range can improve the stability of the asphalt mixture.The maximum improvement effect of polypropylene fiber and glass on the stability of asphalt mixture is 11.29%and 12.10%respectively.The indirect tensile stiffness modulus of asphalt mixture is positively related to the glass content,but it first increases and then decreases with the polypropylene fiber content,and 0.2%polypropylene can increase the stiffness modulus by up to 4.92%.Adding polypropylene fiber and glass to the asphalt mixture can increase the strength of the asphalt mixture by 12.90-19.35%,increase the tensile modulus by 12.55-116.83%,and reduce the high-temperature permanent deformation by 29.4-37.9%.When the content of polypropylene fiber is 0.2%,the optimum content of glass is 6%.

关 键 词：道路工程 沥青混合料 聚丙烯纤维 玻璃集料 力学性能 

分 类 号：TU535[建筑科学—建筑技术科学]