沥青混合料细观结构及三维重构  

Three dimensional of asphalt mixture based on microstructure

作　　者：易富[1] 李皓[1] 初国锋 张利阳[1] 苑文辉 苏良雁 

机构地区：[1]辽宁工程技术大学土木与交通学院,辽宁阜新123000

出　　处：《辽宁工程技术大学学报（自然科学版）》2015年第6期716-719,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：辽宁省教育厅科研基金项目(L2013144);百千万人才基金项目(2011921064)

摘　　要：为研究AC-10沥青混合料试件的空隙率,采用SYM-457马歇尔击实仪制作AC-10标准马歇尔试件,并将上述试件按3 mm间隔进行CT扫描,应用Matlab图像处理软件对所得扫描图像进行处理,结合统计学方法计算其空隙率,同时将所得到的dcm格式的CT扫描图像导入Mimics软件中进行三维重构,通过对阈值的调整,实现对沥青混合料中胶浆、空隙、粗集料的识别与分离,最终获得沥青混合料的空隙率.结果表明:相对于应用统计学方法计算得到的沥青混合料空隙率4.7%,应用Mimics软件得到的空隙率为4.56%,与真实值4.0%更接近.In order to research the air void percentages of AC-10 asphalt mixture specimens, this paper used SYM-457 automatic Marshall compaction instrument to make AC-10 standard Marshall compaction molding, applied the CT technology scan once interval of 3 millimeters, then used Matlab in image processing and combined with statistical methods to calculate air void percentages. At the same time, the scan images were imported from dcm format to Mimics software to perform the three-dimensional reconstruction. The adjustment of the threshold was applied to identify and separate asphalt mortar, air voids and the coarse aggregate, and get the air void percentages of AC-10 asphalt mixture. The result shows that, relative to the method of statistical 4.70%, the method of Mimics 4.56% can be more accurate to the true 4.0%.

关 键 词：道路工程 沥青混合料 空隙率 细观结构 三维重构 

分 类 号：U414[交通运输工程—道路与铁道工程]