SMA与GAC路面抗滑性能衰变规律  

Decay Rule of Skid Resistance of SMA and GAC Pavement

作　　者：黄宏敏 罗传熙 黄志勇 曲大海 HUANG Hong-min;LUO Chuan-xi;HUANG Zhi-yong;QU Da-hai(Guangzhou Municipal Engineering Design and Research Institute Co.,Ltd.,Guangzhou Guangdong 510000,China;School of Civil Engineering and Transportation,South China University of Technology,Guangzhou Guangdong 510000,China;Guangzhou Xiaoning Road Engineering Technology Research Office Co.,Ltd.,Guangzhou Guangdong 510000,China;Administration Office of Yingde-Huaiji Expressway,Zhaoqing Guangdong 510920,China)

机构地区：[1]广州市市政工程设计研究总院有限公司,广东广州510000 [2]华南理工大学土木与交通学院,广东广州510000 [3]广州肖宁道路工程技术研究事务所有限公司,广东广州510000 [4]广东省南粤交通英怀高速公路管理处,广东肇庆510920

出　　处：《公路交通科技》2023年第10期27-34,共8页Journal of Highway and Transportation Research and Development

基　　金：广东省自然科学基金项目(2019A1515011965)。

摘　　要：为进一步提升沥青路面抗滑性能的耐久性,分析了SMA与GAC路面抗滑性能衰变规律差异,找出影响SMA与GAC路面抗滑性能耐久性的关键指标,进而提出磨耗层施工改进措施。针对广东省应用频率最高的SMA-13与GAC-16磨耗层,开展周期性的横向力系数试验工作,分析了SMA-13与GAC-16路面横向力系数随着交通量变化的衰变行为。在室内采用搓揉试验代表车辆荷载作用,开展周期性的压力胶片、构造深度与摆式摩擦试验,获得了不同路面与轮胎的有效接触面积、接触应力峰值、构造深度与摩擦系数的衰减趋势,分析了SMA-13与GAC-16磨耗层初始抗滑性能差异的原因,构建了搓揉试验与现场车辆荷载作用关系,研究了不同类型路面抗滑性能衰变规律与抗滑耐久性的关键指标。结果表明:由于SMA-13路面集料裹附沥青胶浆,其初始抗滑性能低于GAC-16路面,但胶浆磨损后,SMA-13路面抗滑性能提升幅度可达49%,其抗滑性能优于GAC-16路面;在持续车辆荷载作用下,SMA-13路面横向力系数将始终高于GAC-16路面;SMA-13路面抗滑耐久性主要由表面集料与轮胎的咬合作用形成,施工过程中应增加反击破碎比例,尽量提高集料的棱角性与表面粗糙度;GAC-16路面抗滑耐久性主要由表面构造深度形成,施工过程中应将级配曲线调为粗型,同时在碾压过程中降低胶轮碾压温度,尽量提高表面构造深度指标。In order to further improve the durability of the skid resistance of asphalt pavement,the difference in the decay rule of the skid resistance of SMA and GAC pavement is analyzed,and the key indicators affecting the durability of the skid resistance of SMA and GAC pavement are identified.Furthermore,improvement measures for the construction of the wearing layer are proposed.Periodic lateral force coefficient tests are conducted on the SMA-13 and GAC-16 wearing layers with the highest frequency of application in Guangdong Province,analyzing the decay behavior of the lateral force coefficients of SMA-13 and GAC-16 pavement with changes in traffic volume.The rolling test is conducted indoors to represent the vehicle load effect.Periodic pressure film,structural depth,and pendulum friction tests are conducted to obtain the effective contact area,peak contact stress,structural depth,and attenuation trend of friction coefficient between different road surfaces and tires.The reasons for the difference in initial anti-slip performance between SMA-13 and GAC-16 wear layers are analyzed,the relationship between rolling test and on-site vehicle load effect is constructed,and the decay rule of skid resistance performance and key indicators of skid resistance durability for different types of road surfaces are studied.The result shows that(1)due to the adhesion of asphalt slurry to SMA-13 pavement aggregates,its initial skid resistance is lower than that of GAC-16 pavement,however,after the slurry is worn,the skid resistance performance of SMA-13 pavement can be improved by 49%,which is superior to GAC-16 pavement;(2)under continuous vehicle load,the lateral force coefficient of SMA-13 pavement will always be higher than that of GAC-16 pavement;(3)the skid resistance durability of SMA-13 pavement is mainly formed by the interlocking effect between surface aggregates and tires,during the construction process,the proportion of impact crushing should be increased to maximize the angularity and surface roughness of the aggregates;

关 键 词：道路工程 抗滑性能 搓揉试验 沥青路面 衰减 

分 类 号：U416.1[交通运输工程—道路与铁道工程]