基于足尺加速加载试验的高速公路沥青面层力学性能与高温性能研究  

Study on Mechanical Properties and High Temperature Properties of Expressway Asphalt Pavement Based on Full Scale Accelerated Loading Test

作　　者：陈光伟[1] 马永磊 马千越 郑炳锋 吕正龙 吴威伟 CHEN Guangwei;MA Yonglei;MA Qianyue;ZHENG Bingfeng;LYU Zhenglong;WU Weiwei(Jiangsu Traffic Engineering Construction Bureau,Nanjing 210004,China;JSTI Group Co.,Ltd.,Nanjing 210019,China;National Engineering Research Center for New Road Materials,Nanjing 211112,China;Southeast University,Nanjing 211189,China)

机构地区：[1]江苏省交通工程建设局,南京210004 [2]苏交科集团股份有限公司,南京210019 [3]新型道路材料国家工程研究中心,南京211112 [4]东南大学,南京211189

出　　处：《现代交通技术》2024年第2期10-16,共7页Modern Transportation Technology

基　　金：江苏省交通运输科技项目(2018Y27)。

摘　　要：针对高速公路改扩建工程老路沥青面层,在120万次足尺加速加载试验条件下,采用动态模量试验评价其力学性能,采用贯入强度试验与汉堡车辙试验评价其高温性能。动态模量试验结果表明,20℃、10 Hz条件下沥青面层芯样0~120万次的动态模量维持在相对稳定的状态,最大值与最小值偏差约为6.9%。贯入强度试验结果表明,0~120万次的沥青面层芯样的单轴贯入强度相对稳定,老路的加铺层、上面层、中面层、下面层的贯入强度变化量分别为-0.04 MPa、0.11 MPa、-0.03 MPa、0.18 MPa。汉堡车辙试验结果表明,加铺层和上面层的芯样总体维持在稳定的状态,中面层和下面层芯样试验结果有一定程度的波动,下面层变化相对明显:汉堡车辙深度的变化率为114.56%,蠕变斜率的变化率为150%。根据120万次足尺加速加载试验结果,该高速公路改扩建工程老路沥青面层在力学性能和高温性能方面表现稳定,扩建后的路面能够满足交通荷载的使用要求。The dynamic modulus test is used to evaluate the mechanical properties of the old asphalt pavement of expressway reconstruction and expansion project under the condition of 1.2 million full scale accelerated loading tests,and the penetration strength test and Hamburg rutting test are used to evaluate its high-temperature properties.The dynamic modulus test results show that the dynamic modulus of 0-1.2 million times of core samples of asphalt surface course at 20℃and 10 Hz is relatively stable,and the deviation between the maximum and minimum is about 6.9%.The results of penetration strength test show that the uniaxial penetration strength of 0-1.2 million times of core samples of asphalt pavement is relatively stable,and the changes of penetration strength of overlay,upper layer,middle layer and lower layer of old road are-0.04 MPa,0.11 MPa,-0.03 MPa and 0.18 MPa respectively.The results of Hamburg rutting test show that the core samples of overlay and upper layer maintain a stable state,the test results of core samples of middle layer and lower layer fluctuate to a certain extent,and the change of lower layer is relatively obvious:the change rate of Hamburg rutting depth of lower layer is 114.56%,and the change rate of creep slope of lower layer is 150%.According to the results of 1.2 million full scale accelerated loading tests,the mechanical properties and high-temperature properties of the old asphalt pavement of the expressway reconstruction and expansion project are stable,the expanded pavement can meet the requirements of traffic load.

关 键 词：高速公路改扩建工程 沥青面层 足尺加速加载试验 动态模量 贯入强度 汉堡车辙 

分 类 号：U416.217[交通运输工程—道路与铁道工程]