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首页> 外文期刊>Frontiers of structural and civil engine >A study on fatigue damage of asphalt mixture under different compaction using 3D-microstructural characteristics
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A study on fatigue damage of asphalt mixture under different compaction using 3D-microstructural characteristics

机译：利用3D微观结构特性研究不同压实度下沥青混合料的疲劳损伤

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The aim of this paper is investigating the microstructural characteristics of asphalt mixture under different compaction powers. In order to achieve this aim, a test track was built to provide asphalt mixture specimens and X-ray computed tomography (XCT) device was used to scan the internal structure. The aggregate particles and air-voids were extracted using Digital Image Processing (DIP), so the relationship between compaction and air-voids was determined at first, and then, the effect of aggregate particles on the morphology of air-voids can be evaluated, finally, fatigue properties of asphalt mixture with different air-void ratio were measured by indirect tensile fatigue test as well. The research results release the distribution of microstructures in asphalt pavement. 3D fractal dimension is an effective indicator to quantize the complexity of aggregate particles and air-voids; suffering the same compaction power, aggregates cause different constitutions of air-voids in asphalt mixture; investigation in this paper can present the essential relationship between microstructures and fatigue properties.
机译：本文的目的是研究不同压实功率下沥青混合料的微观结构特征。为了达到这个目的，建立了一条测试跑道以提供沥青混合料样本，并使用X射线计算机断层扫描（XCT）装置扫描内部结构。使用数字图像处理（DIP）提取聚集颗粒和气孔，因此首先确定压实度与气泡之间的关系，然后可以评估聚集颗粒对气泡形态的影响，最后，还通过间接拉伸疲劳试验测量了不同空隙率的沥青混合料的疲劳性能。研究结果揭示了沥青路面微观结构的分布。 3D分形维数是量化聚集颗粒和空隙的复杂性的有效指标；遭受相同的压实力，集料导致沥青混合料中气孔的组成不同；本文的研究可以提出微观结构与疲劳性能之间的本质关系。

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