岩沥青旧路材料性能衰变规律研究  

Investigation on the degradation patterns of material properties in aged roads with rock asphalt

作　　者：黄文悦 岳建洪 蒋双全 毛成 王自林 孔林 HUANG Wenyue;YUE Jianhong;JIANG Shuangquan;MAO Cheng;WANG Zilin;KONG Lin(Sichuan Chengqiongya Expressway Co.Ltd.,Chengdu 610000,China;Sichuan Highway Bridge Construction Group Co.Ltd.,Chengdu 610041,China;Sichuan Jiaotou Design Consulting and Research Institute Co.Ltd.,Chengdu 610041,China;Civil Engineering School of Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]四川成邛雅高速有限公司,四川成都610000 [2]四川公路桥梁建设集团有限公司,四川成都610041 [3]四川交投设计咨询研究院有限责任公司,四川成都610041 [4]西南交通大学土木工程学院,四川成都610031

出　　处：《新型建筑材料》2024年第12期135-139,共5页New Building Materials

基　　金：四川省交通运输科技项目(2020-ZL-B1)。

摘　　要：为了探究岩沥青对道路服役性能的影响,选取成仁高速、宜泸高速、江习古高速选取典型路段进行钻芯取样。通过测试芯样厚度、对芯样不同层位进行密度试验(表干法)、单轴压缩动态弹性模量试验、马歇尔稳定度试验、劈裂强度试验以及半圆弯曲试验,对3条典型道路服役性能进行评价。结果表明:3条高速公路的中、下面层力学性能良好,与基质沥青对比,岩沥青的掺入一定程度削弱了沥青混凝土的低温抗裂性能,对沥青混凝土的密度以及高温条件下动态弹性模量有小幅度提升作用,同时能显著提高沥青混合料的马歇尔稳定度。To investigate the impact of rock asphalt on road service performance,core samples were extracted from typical sections of the Chengren Expressway,Yilu Expressway,and Jiangxi-Gu Expressway.The core samples were tested for thickness,density(using the surface dry method),uniaxial compressive dynamic modulus,Marshall stability,splitting strength,and semicircular bending.The service performance of the three typical roads was evaluated.The results show that the mechanical properties of the middle and lower layers of the three highways are good.Compared to matrix asphalt,the inclusion of rock asphalt somewhat reduced the low-temperature crack resistance of the asphalt concrete,slightly increased its density and dynamic elastic modulus at high temperatures,and significantly enhanced the Marshall stability of the asphalt mixture.

关 键 词：岩沥青旧路 沥青面层 材料性能 芯样检测 

分 类 号：TU528.42[建筑科学—建筑技术科学]