冻融循环对沥青混合料动态模量影响的试验研究  

Experimental Research on Influence of Freezing and Thawing Cycle on Dynamic Modulus of Asphalt Mixture

作　　者：谢国栋[1] 王洪涛[2] 段晓沛[1] 

机构地区：[1]天津市市政工程设计研究院,天津市300051 [2]辽宁省交通科学研究院有限责任公司,沈阳市110015

出　　处：《北方交通》2017年第7期96-98,共3页Northern Communications

摘　　要：通过室内试验,对普通基质沥青结合料与加入矿质纤维沥青结合料生产的不同级配的沥青混合料试件进行冻融循环试验,之后对经过不同次数冻融循环后的试件进行单轴压缩动态模量试验,并对经过不同冻融循环次数后所测出的动态模量进行比对分析。分析结果表明:随着冻融循环次数的增加,不同温度下的混合料动态模量值均有所下降,加入矿物纤维的不同级配沥青混合料较普通沥青混合料的动态模量损失率小;空隙率大的沥青混合料动态模量受冻融循环影响较大。The test of freezing and thawing cycle is made on test pieces of common matrix asphalt binder material and asphalt mixtures with different gradation by adding mineral fiber asphalt binder material through laboratory test. Later,the test of uniaxial compression dynamic modulus on test pieces after different times of freezing and thawing cycles is made,and the comparative analysis on measured dynamic modulus after different times of freezing and thawing cycles is made. The analysis results show that,with the increase of times of freezing and thawing cycles,the dynamic modulus value of mixtures under different temperatures is reduced,the loss ratio of dynamic modulus of asphalt mixtures with different gradation by adding mineral fiber is smaller than that of dynamic modulus of common asphalt mixture,and the dynamic modulus of asphalt mixture with large void ratio is largely influenced by freezing and thawing cycle.

关 键 词：冻融循环 沥青混合料 动态模量 矿物纤维 

分 类 号：U414.03[交通运输工程—道路与铁道工程]