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<p>The structural durability of fully permeable asphalt pavements is frequently compromised by the inherent conflict between high porosity and mechanical stability. This study evaluates a high-performance pavement system employing a devulcanized rubber powder (DRP)/SBS composite-modified surface and a vinyl acetate-ethylene (VAE) emulsion-modified porous base. Through a multi-scale approach, the microscopic interactions, macroscopic engineering properties, and structural mechanical responses were systematically investigated. Micro-characterization via SEM and FM revealed that DRP particles, activated by desulfurization, form a robust interlocking network with the SBS-modified asphalt matrix, enhancing interfacial adhesion. Performance evaluations of the dry-mixed PAC-13 mixtures demonstrated that an optimal 10-20&#xa0;wt.% DRP dosage improves dynamic stability by 31.4% and significantly enhances raveling resistance while maintaining a high permeability coefficient (&gt; 5000&#xa0;mL/min). Simultaneously, the VAE emulsion bridges micro-cracks within the cementitious skeleton, increasing the 7-day unconfined compressive strength to 9.28&#xa0;MPa. Three-dimensional finite element analysis further validates the mechanical superiority of this configuration. Theoretical simulations indicate that the VAE-fortified base provides rigid support that can theoretically reduce surface deflection by up to 21.4% under reference conditions, while the flexible DRP-modified surface layer functions as a stress-relief buffer. This synergistic “flexible-on-rigid” configuration effectively mitigates tensile stresses at the structural layer bottoms, fundamentally reducing fatigue-critical stresses in permeable pavement infrastructures for sponge city applications.</p>

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Performance Evaluation and Mechanical Response of a Fully Permeable Pavement Utilizing DRP/SBS Surface and VAE-Modified Base

  • 期刊论文

  • 发表日期：

    2026年8月5日

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  • Mingming Zhang,
  • Wenbo Zhou,
  • Wenbo Li,
  • Dongwei Cao

摘要

The structural durability of fully permeable asphalt pavements is frequently compromised by the inherent conflict between high porosity and mechanical stability. This study evaluates a high-performance pavement system employing a devulcanized rubber powder (DRP)/SBS composite-modified surface and a vinyl acetate-ethylene (VAE) emulsion-modified porous base. Through a multi-scale approach, the microscopic interactions, macroscopic engineering properties, and structural mechanical responses were systematically investigated. Micro-characterization via SEM and FM revealed that DRP particles, activated by desulfurization, form a robust interlocking network with the SBS-modified asphalt matrix, enhancing interfacial adhesion. Performance evaluations of the dry-mixed PAC-13 mixtures demonstrated that an optimal 10-20 wt.% DRP dosage improves dynamic stability by 31.4% and significantly enhances raveling resistance while maintaining a high permeability coefficient (> 5000 mL/min). Simultaneously, the VAE emulsion bridges micro-cracks within the cementitious skeleton, increasing the 7-day unconfined compressive strength to 9.28 MPa. Three-dimensional finite element analysis further validates the mechanical superiority of this configuration. Theoretical simulations indicate that the VAE-fortified base provides rigid support that can theoretically reduce surface deflection by up to 21.4% under reference conditions, while the flexible DRP-modified surface layer functions as a stress-relief buffer. This synergistic “flexible-on-rigid” configuration effectively mitigates tensile stresses at the structural layer bottoms, fundamentally reducing fatigue-critical stresses in permeable pavement infrastructures for sponge city applications.