Implications of Experimental Measurements and Analyses of the Internal Structure of Hot-Mix Asphalt
Implications of Experimental Measurements and Analyses of the Internal Structure of Hot-Mix Asphalt
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DOI：
10.3141/1891-25
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发表时间：
2004
影响因子：
1.7
通讯作者：
E. Masad;J. Button
中科院分区：
文献类型：
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作者：
E. Masad;J. Button
本研究总结了用于表征和量化热拌沥青（HMA）路面混合料内部结构的试验和分析方法。内部结构分析对HMA的设计、压实和性能的影响也进行了讨论。方法可分为两大类：体积分析法和成像法。体积分析方法依赖于在一定骨料尺寸中或在整个混合料中空气空隙百分比的散装测量，作为填料的指标。这些概念目前被用于高密度HMA的超级摊铺机设计系统、石基质沥青设计以及HMA中骨料级配选择的Bailey方法。成像方法通过分析内部结构的图像来量化骨料骨架、矿物骨料中的空隙和空气空隙的分布。这些图像可以通过连接到相机的显微镜的简单设置进行二维捕获，也可以通过x射线计算机断层扫描系统进行三维捕获。
This study summarizes the experimental and analysis methods used in characterizing and quantifying the internal structure of hot-mix asphalt (HMA) paving mixtures. The implications of the internal structure analysis for the design, compaction, and performance of HMA are also discussed. The methods can be divided into two categories: volumetric analysis methods and imaging methods. The volumetric analysis methods rely on bulk measurements of the percentage of air voids in certain aggregate sizes or in the whole mix as indicators of packing. These concepts are currently used in the Superpaver design system for densegraded HMA, stone matrix asphalt design, and the Bailey method for selection of aggregate gradations in HMA. The imaging methods quantify the distribution of the aggregate skeleton, voids in the mineral aggregate, and air voids by analyzing images of the internal structure. These images can be captured two-dimensionally with a simple setup of a microscope connected to a camera or three-dimensionally with an X-ray computed tomography system.