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<p>A virtual rutting experimental model was established based on the discrete element method (DEM) to investigate the influence of microscopic initial defects on the mechanical properties of asphalt materials. The data from the model, which determines the mesoscopic parameters by parameter inversion, were compared with the data from the actual rutting test. To ensure the accuracy of the model data, the discrete fracture network (DFN) was used to characterize the microscopic initial defects of the material. It indicated that the virtual rutting experiment results were consistent with the actual experimental results. The effect of incipient defects on asphalt mixtures could be well characterized by a virtual rutting test model. Microscopic defects had a significant effect on the mechanical properties of materials. The overall structural strength of the material decreased significantly. When the length of the micro-crack was greater than 4&#xa0;mm and the width (dist) was between 0.15&#xa0;mm and 0.45&#xa0;mm, the reduction in material strength was most significant. During construction, the length and width of cracks were controlled by effective means, which was beneficial for improving the crack resistance of materials.</p>

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Analysis of asphalt rutting simulation test considering initial defects

  • 期刊论文

  • 发表日期：

    2025年7月15日

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  • Xiangyang Lv,
  • Zichen Chang,
  • Xiaoyong Wu,
  • Zhanyou Yan,
  • Guofang Zhao

摘要

A virtual rutting experimental model was established based on the discrete element method (DEM) to investigate the influence of microscopic initial defects on the mechanical properties of asphalt materials. The data from the model, which determines the mesoscopic parameters by parameter inversion, were compared with the data from the actual rutting test. To ensure the accuracy of the model data, the discrete fracture network (DFN) was used to characterize the microscopic initial defects of the material. It indicated that the virtual rutting experiment results were consistent with the actual experimental results. The effect of incipient defects on asphalt mixtures could be well characterized by a virtual rutting test model. Microscopic defects had a significant effect on the mechanical properties of materials. The overall structural strength of the material decreased significantly. When the length of the micro-crack was greater than 4 mm and the width (dist) was between 0.15 mm and 0.45 mm, the reduction in material strength was most significant. During construction, the length and width of cracks were controlled by effective means, which was beneficial for improving the crack resistance of materials.