长期服役路面老化沥青流变性能研究  

Research on the Rheological Properties of Aging Asphalt from Long-term Service Pavement

作　　者：秦哲焕 肖月[1] 仪明伟 吴少鹏[1] 

机构地区：[1]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070

出　　处：《武汉理工大学学报》2015年第10期42-46,共5页Journal of Wuhan University of Technology

摘　　要：基于长期服役的老化沥青路面,围绕横纵缝和坑槽两种病害位置,在沥青路面的上、中两个面层钻芯取样。实验室抽提回收得到老化沥青,通过老化沥青的频率特性、温度特性来分析其流变性能,对沥青路面进行路面沥青材料使用性能评价。结果表明,沥青路面在长期服役过程中,沥青复合模量增加,相位角减小,沥青材料老化作用显著,并且罩面层沥青由于与外界环境直接接触,其沥青的老化程度大于上面层。Core samples were collected from transverse and longitudinal crack area and pot holes area on along-term service pavement. Aged asphalt was extracted from the collected specimens. The rheological properties of the recoveredit evaluated by means of Dynamic Shearrheometer（ DSR）. The temperature / frequency sensitivities were characterized to predict its performance.Results show that asphalt aging occurs during the service life. Comparing to the middle layer,the surface layer agedfaster.

关 键 词：沥青路面 动态剪切流变实验 流变性能 

分 类 号：U414[交通运输工程—道路与铁道工程]