基于抗车辙性能的AC-13沥青混合料级配范围研究  

Study of AC-13 Grading Envelope Based on Rutting Resistance Performance for Hot-mix Asphalt

作　　者：黄维蓉[1] 宋涛 何兆益[1] 冉龙飞[1,2] 胥吉[3] 

机构地区：[1]重庆交通大学土木建筑学院,重庆400074 [2]重庆市交通委员会基本建设工程质量与安全监督站,重庆400060 [3]广东省长大公路工程有限公司,广州511431

出　　处：《武汉理工大学学报》2012年第5期44-48,共5页Journal of Wuhan University of Technology

基　　金：重庆市交通委员会科技重点项目(2007003)

摘　　要：以2.36mm作为AC-13沥青混合料级配的粗细集料分界点;对2.36mm以上粗集料部分,采用各粒径不同比例的堆积密度试验进行研究,并以最小矿料间隙率作为判据确定粗集料的合理级配组成;选取不同细集料组成、不同粗细比例的9种级配的AC-13沥青混合料进行冻融劈裂试验和车辙试验。研究结果表明:2.36mm通过率对沥青混合料高温抗车辙能力和水稳定性影响较大;根据室内试验结果和级配应用经验,提出了适应于夏炎热区气候特点的AC-13沥青混合料工程设计级配范围,以提高夏炎热区沥青路面抗车辙能力。In this paper,2.36 mm is considered as the primary control sieve which defines coarse and fine aggregate for AC-13;and bulk density tests are used to determine the optimum proportions of coarse aggregate in the mixes;9 kinds of gradation including different shapes of fine aggregate and different percent passing of control sieve are selected and tested through Wheel Tracking Test and Freeze-Thaw Split Test.The results show that the percent passing of 2.36 mm has significant impact on the high-temperature rutting resistance and water stability of the asphalt mixture.Based on laboratory test results,all aspects of road performance requirements are integrated,and the grading envelope of AC-13 for mix design adapted to the characteristics of hot climates district are resulted to improve the rutting resistance capability in hot climates district.

关 键 词：沥青混合料 车辙 水稳定性 级配范围 炎热区 

分 类 号：U416[交通运输工程—道路与铁道工程]