基于沥青混合料各组分密度的内部结构均匀性分析  

HOMOGENEITY OF INTERNAL STRUCTURE OF ASPHALT MIXTURES BASED ON DENSITY OF INCLUSIONS

作　　者：郭乃胜[1] 王聪[1] 赵颖华[1] 谭忆秋[2] 尤占平 

机构地区：[1]大连海事大学道路与桥梁工程研究所,辽宁大连116026 [2]哈尔滨工业大学交通科学与工程学院,黑龙江哈尔滨150090 [3]密歇根理工大学土木与环境工程系,密歇根霍顿49931

出　　处：《工程力学》2016年第7期249-256,共8页Engineering Mechanics

基　　金：国家自然科学基金项目(51308084);中央高校基本科研业务费专项资金项目(3132014223)

摘　　要：为了有效地测试和评价沥青混合料内部结构均匀性,应用X-ray CT技术和数字图像处理方法,考虑粗集料、砂浆和空隙各组分的作用,提出了一种基于沥青混合料各组分密度的内部结构均匀性识别方法,选用4组不同油石比的沥青混合料试件,利用该方法对其内部结构均匀性进行了分析。结果表明:基于该方法提出的均匀性评价参数可以识别单一或一组沥青混合料试件的内部结构均匀性,并且通过分析计算得到沥青混合料的最佳油石比与室内试验获得的相差0.21%,这表明均匀性识别方法的有效性。The objective of this study is to test and evaluate the homogeneity of internal structure of asphalt mixtures effectively. A homogeneity identifying method based on the density of inclusions （HIMDI） of asphalt mixtures is put forward which uses X-ray CT techniques and digital image processing to consider the interaction of coarse aggregate, mastics, and air voids. Asphalt mixture specimens including four groups of asphalt-aggregate ratios are used to analyze the homogeneity of the internal structure of the specimens using the HIMDI. The results show that the homogeneity of internal structures of single or a set of asphalt mixtures specimens can be characterized through analyzing the homogeneity evaluation parameters proposed by the HIMDI, and the difference between the optimum asphalt-aggregate ratio of asphalt mixtures calculated by the HIMDI and the test result is 0.21%. This means that the HIMDI is an effective method with acceptable precision in analyzing homogeneity of internal structure of asphalt mixtures.

关 键 词：道路工程 沥青混合料 数字图像 均匀性 X-RAY CT 密度 

分 类 号：U414[交通运输工程—道路与铁道工程]