下承层界面状况对多孔沥青路面层间黏结性能的影响  

Effect of Interface Condition of Underlying Layer on Interlaminar Bonding Performance of Porous Asphalt Pavement

作　　者：李俊[1] 李洪刚 李明亮[1] 杨振海 LI Jun;LI Hong-gang;LI Ming-liang;YANG Zhen-hai(Research Institute of Highway Ministry of Transport,Beijing 100088,China;Jiangsu NingSuXu Expressway Co.Ltd.,Suqian 223800,China)

机构地区：[1]交通运输部公路科学研究院,北京市100088 [2]江苏宁宿徐高速公路有限公司,宿迁市223800

出　　处：《公路》2021年第6期7-10,共4页Highway

基　　金：中央级公益性科研院所基本科研业务费专项资金项目,项目编号2019-0117;交通运输行业重点科技项目清单,项目编号2019-TG-002;江苏省交通运输科技项目,项目编号2019Y04。

摘　　要：下承层界面的结构形式、粗糙度及其与多孔沥青层的结合状态,均会对多孔沥青路面的层间黏结性能产生影响。为了探究其影响程度,以层间抗剪强度和层间抗拉强度作为评价指标,首先对比了不同结构形式的下承层对层间黏结强度的影响;其次以下承层铣刨和未铣刨代表不同的粗糙度,分析了二者层间黏结强度的差异;最后采用车辙仪碾压模拟不同的界面结合状态,分析了下承层界面经碾压后层间黏结强度的变化规律。研究结果表明:采用小粒径、骨架密实型结构形式的混合料作为多孔沥青层下承层,可以提高多孔沥青路面的层间黏结强度;铣刨增加了下承层界面的粗糙度,对多孔沥青路面层间黏结强度提升有利;随着碾压次数增加,黏层材料与多孔沥青层的结合状态增强,使多孔沥青路面的层间黏结强度更大。The structure form,roughness of underlying layer interface and its bonding status with porous asphalt course all affect the interlaminar bonding performance of porous asphalt pavement.In order to explore the influence level,the interlaminar shear strength and tensile strength are taken as the evaluation indexes to carry out analysis of the interlaminar bonding strength with different structural forms on the underlying layer.Then the difference of interlaminar bonding strength of underlying layer with different roughness represented by milling and un-milling are analyzed.Finally,the rolling action of rutting tester is used to simulate different interface bonding status,and the changing law of interlaminar bonding strength is analyzed.The research results show that using the mixture with small particle size and dense framework structure as the underlying layer can improve the interlaminar bonding performance of porous asphalt pavement.The roughness of the underlying layer interface increases by milling,and it is beneficial to promote the interlaminar bonding strength of porous asphalt pavement.With the increase of the number of rolling,the bonding state of the adhesive layer material and the porous asphalt layer is strengthened,making the interlaminar bonding strength of the porous asphalt pavement greater.

关 键 词：道路工程 层间黏结性能 下承层界面状况 多孔沥青路面 黏层 

分 类 号：U416.217[交通运输工程—道路与铁道工程]