浸水状态对沥青混凝土疲劳寿命的影响  

Effect of Immersion Conditions on Fatigue Life of Asphalt Concrete

作　　者：杨大田[1] 周乾 YANG Da-tian;ZHOU Qian(School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China;Guangxi Communications Planning, Survey and Design Institute Co. , Ltd. , Nanning 530001, Guangxi, China)

机构地区：[1]重庆交通大学土木工程学院,重庆400074 [2]广西交通规划勘察设计研究院有限公司,广西南宁530001

出　　处：《筑路机械与施工机械化》2018年第3期54-59,64,共7页Road Machinery & Construction Mechanization

基　　金：国家自然科学基金项目(51078374);广西壮族自治区科学技术厅项目(桂科攻1598009-11);重庆市教委科学技术研究项目(KJ130417)

摘　　要：为了研究无水、静水和循环水3种浸水条件对沥青混凝土间接拉伸疲劳寿命的影响,轮碾成型SMA-13、AC-16和AC-20标准车辙板,空隙率为7%±1%,用钻芯机钻取直径100mm、双面磨成厚度为40~45mm的圆柱形试样;在气动伺服材料试验机上进行在无水、静水和循环水条件下的间接拉伸疲劳试验。试验结果表明,有水显著地缩短了沥青混凝土的疲劳寿命,静水和循环水条件对沥青混合料疲劳寿命的影响无显著区别。In order to test the effect of three kinds of immersion conditions of no water, still water and circulating water on the indirect tensile fatigue life of asphalt concrete, the standard rutting samples of SMA-13, AC-16 and AC-20 were made by rolling with wheels. The cores with diameter of 100 mm and thickness of 40-45 mm, of which the air voids were around 7%±1%, were drilled by the core drilling machine and grinded on both sides. Indirect tensile fatigue tests were carried out by the pneumatic servo material testing machine under the forementioned conditions. The results show that water has significantly shortened the fatigue life of asphalt concrete. Meanwhile, the still water and circulating water have unnoticeable difference in that case.

关 键 词：沥青混凝土 疲劳寿命 间接拉伸疲劳试验 浸水状态 

分 类 号：U414.18[交通运输工程—道路与铁道工程]