利用沥青混合料复数模量确定松弛模量研究  

Determination of Relaxation Modulus Using Complex Modulus of Asphalt Mixture

作　　者：赵延庆[1] 唐积民[1] 白龙[1] 

机构地区：[1]大连理工大学交通运输学院,辽宁大连116024

出　　处：《建筑材料学报》2012年第4期498-502,共5页Journal of Building Materials

基　　金：高等学校博士学科点专项科研基金资助项目(20100041120005);国家自然科学基金资助项目(50778057);内蒙古交通科技项目(NJ-2009-11);西部交通建设科技项目(2009318773054)

摘　　要：利用沥青混合料(Superpave 20)在不同温度和频率下的复数模量试验结果,得到沥青混合料的存储模量.根据时间-温度等效原理,确定了沥青混合料存储模量主曲线.利用配置法和相关的黏弹性理论关系式,将沥青混合料的存储模量转化为沥青混合料的松弛模量,并确定了松弛模量Prony系列表达式的各个参数.结果表明:利用较为简单的复数模量试验可以确定沥青混合料在10-8～108 s内的松弛模量,且松弛模量Prony系列表达式具有幂指数组合形式并对应于Wiechert力学模型,这为沥青混合料黏弹性力学分析提供了有效途径.Direct determination of relaxation modulus from testing involves difficulties in testing operation and may cause large errors. Storage modulus master curve for Superpave 20 asphalt mixture were developed according to time-temperature superposition principle using storage modulus from complex modulus testing results at various temperatures and frequencies. The storage modulus was converted to relaxation modulus by using collocation method and viscoelastic theories. The parameters of Prony series representations for relaxation modulus were determined. The results show that relaxation modulus over 10^-8- 10^8s can be obtained for asphalt mixtures using simple complex modulus testing. The Prony series representations for re- laxations modulus correspond to Wiechert mechanical models and they are expressed in exponential series form. The results provide great conveniences in the analysis of viscoelastic mechanical behavior of asphalt mixtures.

关 键 词：复数模量 松弛模量 配置法 Prony系列 

分 类 号：U414.1[交通运输工程—道路与铁道工程]