浅谈纤维在桥面铺装中的应用

桥面铺装沥青混凝土层直接承受行车荷载、梁体变形和环境因素的作用,受力情况复杂,因此对桥面铺装沥青混凝土的性能提出更高的要求。该文通过水稳定性、高温车辙、低温弯曲和单轴静态蠕变试验系统研究了纤维改性沥青混凝土的性能。研究结果表明,掺加纤维后能够有效提高沥青混合料的残留稳定度和冻融劈裂强度比,同时能够改善低温抗拉性能和抗高温变形能力,纤维增强沥青混合料适宜用作桥面铺装层。

Application of Fiber in the Bridge Deck Pavement

The forces condition of asphalt concrete pavement layer are complex,directly affected by traffic load,beam deformation and environmental factors,therefore higher performances of asphalt bridge deck pavement are demanded.In this paper,the asphalt concretes are modified by addition of the polyester fiber.Through water damage,rutting,low temperature bending and unaxial static creep test,the result indicate Marshall stability ratio（MSR） and tensile strength ratio（TSR） are improved by adding fiber in the asphalt mixture,and meantime,the low-temperature resistance of tensile properties and high temperature resistance of deformation of asphalt concrete mixed with fiber also are ameliorated.