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Implications of Experimental Measurements and Analyses of the Internal Structure of Hot-Mix Asphalt

机译：沥青混合料内部结构实验测量与分析的意义

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摘要

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 Superpave~® design system for dense- graded 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.
机译：这项研究总结了用于表征和量化热混合沥青（HMA）铺路混合物内部结构的实验和分析方法。还讨论了内部结构分析对HMA的设计，压实和性能的影响。这些方法可以分为两类：体积分析方法和成像方法。体积分析方法依赖于对某些骨料尺寸或整个混合物中的空隙百分比的整体测量，作为包装的指标。目前，这些概念已用于Superpave〜®设计系统中的高等级HMA，石基质沥青设计和Bailey方法中，用于选择HMA中的骨料级配。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，或者使用X射线计算机断层摄影系统进行三维捕获。

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