钢桥面沥青铺装磨耗层抗滑及耐磨耗性能分析  

Analysis of skid resistance and wear resistance performance of asphalt pavement wearlayer on steel bridge deck

作　　者：王民[1,2] 王明明 王滔 韦宏年 李开一 WANG Min;WANG Mingming;WANG Tao;WEI Hongnian;LI Kaiyi(China Merchants Chongqing Communications Technology Research&Design Institute Co.,Ltd.,Chongqing 400067,China;China Merchants Zhixiang Road Technology(Chongqing)Co.,Ltd.,Chongqing 401336,China;Chongqing Jianwei Engineering Testing Co.,Ltd.,Chongqing 400020,China;School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]招商局重庆交通科研设计院有限公司,重庆400067 [2]招商智翔道路科技(重庆)有限公司,重庆401336 [3]重庆市建维工程检测有限公司,重庆400020 [4]重庆交通大学土木工程学院,重庆400074

出　　处：《交通科学与工程》2024年第6期34-41,共8页Journal of Transport Science and Engineering

基　　金：国家重点研发计划(2021YFB2601202)。

摘　　要：针对钢桥面铺装的厚度限制及密水性的要求,采用沥青混合料摩擦特性测试仪、激光扫描仪等设备对四种常用于钢桥面磨耗层的混合料进行了加速加载磨耗试验,并采用Asymptotic模型对数据进行拟合分析,从而确定了沥青混合料抗滑性能参数与磨耗次数之间的相关性。结果表明:随着磨耗次数的增加,沥青混合料的动态摩擦系数、摆值(BPN)、构造深度(MTD)及断面平均构造深度(MPD)均呈现出初期快速下降,后期逐渐减缓的趋势;Asymptotic模型可对四种混合料抗滑性能与磨耗次数之间的关系进行准确表征,相关性系数达到0.95以上;从抗滑性能来看,改性沥青SMA13与EA10表现出了明显优势,特别是EA10的动态摩擦系数及摆值(BPN)两个指标均比其他三种混合料的高。然而,EA10的构造深度(MTD)通常难以达到0.8的标准。结合工程实践经验,建议在磨耗层性能满足要求且其厚度允许的前提下,优先考虑采用改性沥青SMA13。同时,由于现行规范要求的抗滑性能检测方法之间存在一定差异,宜扩大样本来源,以更全面地阐明这些方法与路面抗滑性能之间的相关性。In response to the requirements of thickness limitation and water tightness of steel bridge deck pavement,the accelerated loading wear test of four common mixtures for the wear layer of steel bridge decks was carried out with an asphalt mixture friction characteristic tester,a laser scanner,and other instruments.The Asymptotic model was used to fit and analyze the data,and the correlation between the parameters of skid resistance performance and wear times of the asphalt mixtures was determined.The results show that with the increase of wear times,the dynamic friction coefficient,British pendulum number(BPN),texture depth(MTD),and mean profile depth(MPD)of the asphalt mixtures all show a downward trend,with the decay rate being high first and then becoming low.The Asymptotic model can accurately characterize the relationship between skid resistance and wear times of the four mixtures,and the correlation coefficient is higher than 0.95.From the perspective of skid resistance,modified asphalt SMA13 and EA10 have certain advantages.Especially,the dynamic friction coefficient and BPN of EA10 are higher than those of the other three mixtures.However,its MTD is usually difficult to reach 0.8.Combined with engineering practice experience,a suggestion is provided that priority should be given to SMA13 under the premise that the wear layer performance meets the requirements and the thickness is allowed.At the same time,there are some differences between the skid resistance performance detection methods in the current specifications.Thus,it is advisable to expand the sample source to clarify the correlation of these methods with skid resistance performance of pavement more comprehensively.

关 键 词：钢桥面铺装 沥青磨耗层 加速加载磨耗试验 摩擦系数 构造深度 

分 类 号：U414[交通运输工程—道路与铁道工程]