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<p>To facilitate an accurate and rapid characterization of the dynamic modulus of rubber reinforced asphalt mixture, experimentation is here combined with advanced computational homogenization to conduct a series of analyses. First, the dynamic moduli of pure and waste rubber modified asphalt mixtures are obtained experimentally. Subsequently, meso-structure digital twins are generated in MATLAB, and the viscoelastic parameters of the mastic are deduced and verified through dynamic modulus simulations using 2D and 3D homogeneous models subjected to sinusoidal loading. Third, the mixtures are simulated in Abaqus using a novel elastic displacement load approach, which enables significantly faster but still accurate analyses. The results indicate the enhanced deformation resistance of waste rubber mixtures. Numerical results of the virtual mixtures at various temperatures closely match the experimental ones. In parallel, test windows with five different sizes are extracted from five locations of the original model, having an insight into errors introduced by scaling sizes and changing constraint conditions. The proposed elastic displacement load method can provide dynamic moduli rapidly and accurately, demonstrating agreement with the sinusoidal displacement load approach. The 2/3 and 1/2 scaled models, sampled in different locations, proved good predictivity, differently from 1/3, 1/4, and 1/5 ones, characterized by expected increasing errors. The influence of loading constraints on the simulation results is finally underscored by discussing both the dynamic modulus and displacement/stress contours.</p>

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Dynamic Modulus Determination of Asphalt Mixture Modified with Waste Rubber Using Laboratory Data and Test Window Homogenization

  • 期刊论文

  • 发表日期：

    2026年7月9日

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  • Xing Wu,
  • Chen Sun,
  • Aihong Kang,
  • Changjiang Kou,
  • Gabriele Milani

摘要

To facilitate an accurate and rapid characterization of the dynamic modulus of rubber reinforced asphalt mixture, experimentation is here combined with advanced computational homogenization to conduct a series of analyses. First, the dynamic moduli of pure and waste rubber modified asphalt mixtures are obtained experimentally. Subsequently, meso-structure digital twins are generated in MATLAB, and the viscoelastic parameters of the mastic are deduced and verified through dynamic modulus simulations using 2D and 3D homogeneous models subjected to sinusoidal loading. Third, the mixtures are simulated in Abaqus using a novel elastic displacement load approach, which enables significantly faster but still accurate analyses. The results indicate the enhanced deformation resistance of waste rubber mixtures. Numerical results of the virtual mixtures at various temperatures closely match the experimental ones. In parallel, test windows with five different sizes are extracted from five locations of the original model, having an insight into errors introduced by scaling sizes and changing constraint conditions. The proposed elastic displacement load method can provide dynamic moduli rapidly and accurately, demonstrating agreement with the sinusoidal displacement load approach. The 2/3 and 1/2 scaled models, sampled in different locations, proved good predictivity, differently from 1/3, 1/4, and 1/5 ones, characterized by expected increasing errors. The influence of loading constraints on the simulation results is finally underscored by discussing both the dynamic modulus and displacement/stress contours.