基于动态模量试验的沥青混合料老化性能研究  

Research on Aging Performance of Asphalt Mixture Based on Dynamic Modulus Test

作　　者：马莉骍[1] 黄俊峰[2] 

机构地区：[1]武汉铁路职业技术学院铁道信号与工程系,湖北武汉430205 [2]湖北省交通规划设计院,湖北武汉430051

出　　处：《公路工程》2014年第3期317-321,共5页Highway Engineering

摘　　要：为研究沥青混合料老化过程中的动态特性,对在不同温度条件下经受不同频率的动荷载的沥青混合料在不同老化期的动态模量进行试验,分析温度和荷载频率对动态模量及相位角的影响,采用车辙因子对沥青混合料的高温稳定性进行评价,并根据时间温度等效原理建立了不同老化程度的动态模量主曲线。研究结果表明:老化沥青混合料的动态模量和相位角具有明显的温度和频率依赖性,老化使沥青混合料动态模量增大,相位角减小。动态模量主曲线研究结果表明老化使沥青混合料的动态模量在整个温度(或频率)范围内变化幅度减小。In order to study the dynamic characteristics of asphalt mixture m the process o1 aging, dynamic modulus tests of original asphalt mixture, short-term aged asphalt mixture and long-term aged as- phalt mixture at different temperatures and frequencies were measured. The effects of temperature and frequency on dynamic modulus and phase angle were studied. High temperature stability was analyzed by the the rutting parameters. Test results show that the temperature and frequency dependence are remarka- ble for dynamic modulus and phase angle of aging asphalt mixtures. The dynamic modulus of asphalt mix- tures with aging is increased and the phase angle is decreased. The master curves of aging asphalt mix- tures prove that the amplitude of variation of dynamic modulus is decreased in the whole working tempera- ture or frequency range.

关 键 词：沥青混合料 老化 动态模量 相位角 车辙因子 主曲线 

分 类 号：U414.1[交通运输工程—道路与铁道工程]