冻融循环条件下自融雪沥青混合料的细观结构及高温稳定性  

Microstructure and High Temperature Stability of Self-melted Asphalt Mixture under Freeze-thaw Cycles

作　　者：崔亚楠[1] 刘涛 李震 CUI Yanan;LIU Tao;LI Zhen(College of Civil Engineering,Inner Mongolia University of Technology,Huhehot,Inner Mongolia 010051,China;Inner Mongolia Civil Aviation Airport Group Company,Baotou,Inner Mongolia 014000,China)

机构地区：[1]内蒙古工业大学土木工程学院,内蒙古呼和浩特010051 [2]内蒙古民航机场集团公司,内蒙古包头014000

出　　处：《公路工程》2018年第4期92-96,共5页Highway Engineering

基　　金：国家自然科学基金资助项目(11162010);内蒙古自治区自然科学基金(2018MS05053)

摘　　要：为了研究冻融循环前后自融雪沥青混合料的细观结构和高温稳定性,选择盐冻循环前后的普通沥青混合料做为参照,通过扫描电子显微镜(SEM)和单轴动态模量试验,对循环前后两种混合料的细观结构及高温稳定性进行了研究。研究结果表明:经历冻融循环后,自融雪沥青混合料细观结构的界面结构比盐冻后普通沥青混合料更加致密,说明其具有较好的稳定性;同时它具有较高的动态模量和车辙因子E*/sinδ,这表明自融雪沥青混合料应具有更优的弹性、抗车辙性能及高温稳定性。To investigate microstructure and high temperature stability of self-melted asphalt mixture before and after freeze-thaw cycles,taking common asphalt mixture under Salt freezing cycles as research objects,microstructure and high temperature stability of two asphalt mixture before and after freeze-thaw cycles were investigated by scanning electron microscope(SEM)and uniaxial dynamic modulus test.The results show that the interface structure of self-melted asphalt mixture is more compact than common asphalt mixture after freeze-thaw cycles,so self-melted asphalt mixture has better stability.Meanwhile,the result of uniaxial dynamic modulus test shows self-melted asphalt mixture has larger dynamic modulus,smaller phase angle and greater E*/sinδ,which indicates that it has better elasticity,rutting resistance and high temperature stability.

关 键 词：冻融循环 盐冻循环 高温稳定性 细观结构 动态模量 相位角 车辙因子 自融雪沥青混合料 

分 类 号：U414[交通运输工程—道路与铁道工程]