SMA-13沥青混合料动态损伤细观分析  

A Microcosmic Analysis on the Dynamic Damages of SMA-13 Bituminous Mixture

作　　者：高明[1] 

机构地区：[1]辽宁省交通科学研究院,沈阳市110015

出　　处：《北方交通》2014年第4期74-78,共5页Northern Communications

摘　　要：为了研究SMA-13改性沥青混合料承受动态荷载后的内部损伤规律,对SMA-13改性沥青混合料进行了动态蠕变试验,并在试样完好时、达到蠕变点时、进入快速破坏阶段时进行了CT扫描,最后将达到破坏阶段的试件用锯石机切割,对切割面进行光学扫描,通过对两种扫描图像的分析,发现SMA-13改性沥青混合料在动态蠕变试验过程中,内部损伤多发生在较大骨料与胶砂的界面处,胶砂本身没有损伤产生,内部损伤出现的位置、分布区域和演化均具有局部化的特点。To study the damages of SMA - 13 Modified Bituminous Mixture after bearing the dynamic load, dynamic creep test has been carried out on it. Scan the sample separately when it is in good condition, reaches creep points, and enters into rapid failure stage. Finally, the sample that is in its failure stage is cut with stone sawing machine. Do optical scanning to the cut surface and compare the two scan images. The result shows that during the creep test of SMA - 13 Modified Bituminous Mixture, the interior damages mainly take place at the interface between larger aggregates and mortar while the mortar doesn ~t get hurt. The locations of the distribution area and damage evolution are all localized. damages

关 键 词：道路工程 细观损伤 动态蠕变 CT扫描 光学扫描 SMA 沥青混合料 

分 类 号：U414.75[交通运输工程—道路与铁道工程]