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<p>To investigate the modification effects and mechanisms of anti-aging agents on asphalt pavement materials, this study prepared modified asphalts using organic and inorganic agents. Their fundamental properties, high-temperature rheology, morphology, and functional groups were characterized via penetration, softening point, ductility tests, MSCR, SEM, FTIR, and molecular dynamics simulations. Results indicate that organic and inorganic agents enhance anti-aging performance. However, inorganic agents adversely affect low-temperature crack resistance, whereas organic agents exhibit superior compatibility and modification efficacy. At the molecular level, ultraviolet absorber shows the smallest solubility parameter difference with asphalt, indicating the best compatibility and thermal stability. In contrast, hydrotalcite shows largest difference, resulting in poor compatibility and inferior thermal stability.</p>

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Research on the Modification Effects and Mechanisms of Cross-Scale Organic–Inorganic Anti-aging Agents on Asphalt Binders

  • 期刊论文

  • 发表日期：

    2026年5月9日

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  • Guanghui Zheng,
  • Jun Deng,
  • Yuanyu Lu,
  • Xiaolong Sun

摘要

To investigate the modification effects and mechanisms of anti-aging agents on asphalt pavement materials, this study prepared modified asphalts using organic and inorganic agents. Their fundamental properties, high-temperature rheology, morphology, and functional groups were characterized via penetration, softening point, ductility tests, MSCR, SEM, FTIR, and molecular dynamics simulations. Results indicate that organic and inorganic agents enhance anti-aging performance. However, inorganic agents adversely affect low-temperature crack resistance, whereas organic agents exhibit superior compatibility and modification efficacy. At the molecular level, ultraviolet absorber shows the smallest solubility parameter difference with asphalt, indicating the best compatibility and thermal stability. In contrast, hydrotalcite shows largest difference, resulting in poor compatibility and inferior thermal stability.