纤维类型对排水性沥青混合料性能的影响  

Influence of Fiber Types on Relevant Properties of Porous Asphalt

作　　者：刘刚[1] 吴少鹏[1] 磨炼同[2] 陈筝[1] 叶群山[1] 

机构地区：[1]武汉理工大学材料科学与工程学院,武汉430070 [2]荷兰代尔夫特理工大学

出　　处：《武汉理工大学学报》2006年第6期50-52,共3页Journal of Wuhan University of Technology

摘　　要：通过析漏、飞散、体积性能、车辙、冻融劈裂等试验,研究了聚酯和木质素2种纤维对排水性沥青混合料性能的影响。基于摩尔-库仑定理,采用无侧限抗压和间接抗拉强度对混合料的内聚力和内摩擦角进行计算,并通过CT图像对该混合料骨架进行观测。研究结果表明:在排水性沥青混合料中,纤维主要起稳定沥青,增加沥青膜厚的作用,而对混合料的增强作用不显著。相对聚酯纤维而言,木质素纤维更适用于排水性沥青混合料。The research was conducted to evaluate polyester fibers and cellulose fibers on the properties of porous asphalt mixes by using the tests of draindown, abrasion, volumetric properties, rutting and moisture damage. Based on Mohr-Coulomb theory, oohesion and angle of internal friction of porous asphalt were calculated by indirect tension and unconfined compression. Inner skeleton of porous asphalt was observed from CT image. Results indicated that the fibers mainly operate on stabilizing asphalt and thickening asphalt film on aggregates, but lead to minor improvement of the strength characteristics of porous asphalt mixes. In generally, cellulose fibers performed better than polyester fibers in porous asphalt mixes.

关 键 词：排水性沥青混合料 纤维 CT图像分析 力学强度 

分 类 号：U414[交通运输工程—道路与铁道工程]