文档介绍：
基于抗车辙性能的长大纵坡沥青混合料设
计
刘朝晖,周婷,秦仁杰,张景怡,单楠
(长沙理工大学交通运输工程学院,长沙 410004)
摘要:针对沥青路面长大纵坡路段车辙病害比较突出的现象,为最大限度降低路面的早期破坏,提高耐久
性,以沥青混凝土 AC-20 为基础,通过对矿料级配进行优化设计,得到了一种抗永久变形能力更强的紧密
骨架密实结构;选取 BMF(北美孚)和浙江石金 GBF 两种玄武岩纤维,分别采用掺量 %,%和 %进行
车辙试验,分析不同纤维掺量对沥青混合料高温抗变形能力的改善效果。研究结果表明:优化设计后的 SAC
粗集料断级配是一种抗高温永久变形能力很强的矿料级配;玄武岩纤维沥青混合料的动稳定度得到提高,
当纤维掺量在 %-%范围内时增长率比较快,掺量超过 %时增长率开始下降;AC-20 沥青混合料玄
武岩纤维 BMF 最佳掺量为 %,GBF 最佳掺量为 %。研究成果可为长大纵坡路段沥青路面设计提供参
考。
关键词:道路工程;长大纵坡;抗车辙性能;矿料级配;玄武岩纤维
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文献标志码:A
Asphalt mixture design on long steep asphalt pavement
based on the rutting resistance performance
Liu Zhaohui,Zhou Ting,Qin Renjie,Zhang Jingyi,Shan Nan
(School munication and Transportation Engineering, Changsha University of
Science and Technology, Changsha 410004, China)
Abstract: Aiming at the prominent phenomenon of rutting on long steep asphalt
pavement, we optimized the design of mineral aggregate gradation based on asphalt
concrete AC-20 in order to minimize the early road damage and improve the
durability, and obtained a closely skeleton dense structure that had a stronger
resistance to permanent deformation. Two kinds of basalt fibers were selected: BMF
and GBF with dosages of %,% and % for rutting test respectively. The
improvement on resistance to permanent deformation of asphalt mixture at high
temperatures with different fiber contents