摘要
为了满足沥青路面的抗裂需求,结合汶马高速公路建设,进行了应力吸收层沥青混合料设计及性能研究。以SBS改性沥青AC-10和CAM-10两种沥青混合料为研究对象,对比分析了两个级配马歇尔设计指标随油石比的变化,分析了目标空隙率控制分别为2%和4%下的混合料高低温性能及水稳定性。基于四点弯曲试验和Overlay test试验,分析了应力吸收层沥青混合料的抗疲劳性能和抗反射裂缝性能。研究结果表明,在不考虑抗车辙性能时,应力吸收层宜采用目标空隙率为2%的CAM-10沥青混合料,其抗疲劳和抗反射裂缝性能最优;在考虑抗车辙性能时,应力吸收层宜采用目标空隙率为4%的AC-10沥青混合料;在需要兼顾抗车辙性能和抗疲劳性能时,应力吸收层宜采用目标空隙率为4%的CAM-10沥青混合料。
In order to meet the crack resistance requirement of asphalt pavement,the design and performance of asphalt mixture for stress absorbing layer are studied combining with the construction of Wenchuan-Ma\erkang Expressway.Taking SBS modified asphalt AC-10 and CAM-10 as study objects,the changes of Marshall design indexes of two gradations with oil-stone ratio are compared and analyzed.The high and low temperature and water stability of the mixture under target void of 2%and 4%are analyzed.The fatigue resistance and reflective crack resistance abilities of stress absorbing layer asphalt mixture are analyzed based on four-point bending test and overlay test.Results show that,when rutting resistance is not considered,CAM-10 asphalt mixture with target void ratio of 2%should be used in the stress absorbing layer,which has the best anti-fatigue and anti-reflective crack performance.The AC-10 asphalt mixture with target void ratio of 2%should be used in the stress absorbing layer when rutting resistance performance is considered.The CAM-10 asphalt mixture with target void ration of 4%should be used in the stress absorbing layer when rutting resistance ability and fatigue resistance ability are reconciled.
作者
王海朋
陈静
张晓华
张蓉
蒋昊秋
WANG Hai-peng;CHEN Jing;ZHANG Xiao-hua;ZHANG Rong;JIANG Hao-qiu(Sichuan Highway Planning,Survey,Design and Research Institute Ltd,Chengdu 611130,China;Research and Development Center of Transport Industry of Technologies,Materials and Equipment of Highway Construction and Maintenance,Chengdu 611130,China;Sichuan Pavement Structure,Materials and Maintenance Engineering Lab,Chengdu 611130,China;Chengdu Tianfu New Area Investment Group Co.Ltd,Chengdu 610042,China)
出处
《公路》
北大核心
2020年第2期18-24,共7页
Highway
基金
四川省交通运输科技项目,项目编号2015A1-2.
关键词
道路工程
沥青混合料
应力吸收层
路用性能
抗裂
road engineering
asphalt mixture
stress absorption layer
road performance
crack resistance
