基于多级应力局部加载的路面芯样高温蠕变试验研究  

Experiment Study on High Temperature Creep of Pavement Core based on Multi-Stage Stress Local Loading

作　　者：江红 JIANG Hong(Anhui Transportation Holding Group CO.,Ltd,Hefei 230008,China)

机构地区：[1]安徽省交通控股集团有限公司,安徽合肥230008

出　　处：《大连交通大学学报》2020年第6期75-80,共6页Journal of Dalian Jiaotong University

摘　　要：为评估高速公路沥青材料的实际高温性能,基于路面受力情况和车辆轴载分布,提出了多级局部加载的高温蠕变试验.首先统计了取芯路段多年的车辙发展规律,之后通过对平均永久应变率(■)、复合平均永久应变率■和复合蠕变劲度模量(Sc)三个试验指标的分析,结合各取芯路段的车辙情况,并对上中下三个不同层位进行了区分,得到了以宏观车辙指标为依据的路面材料蠕变三阶段判定分界线.In order to evaluate the actual high-temperature performance of highway asphalt materials,an innovative high-temperature creep test with multi-level local loading is proposed based on the pavement stress and vehicle axle load distribution.First,statistics of the rutting development law of the coring section for many years are calculated,and then the average permanent strain rate(■),composite average permanent strain rate(■)and composite creep stiffness modulus(S_c)are analyzed.Through the analysis of the three test indicators,combined with the rutting conditions of each core section,the upper,middle and lower layers are distinguished,and the three-stage determination boundary line of pavement material creep is obtained based on the macro rutting index.

关 键 词：高温性能 旧路评价 多级加载局部蠕变试验 车辙 蠕变曲线 

分 类 号：U416.2[交通运输工程—道路与铁道工程]