ArticleMaterials (Basel, Switzerland)2026
Multiscale Investigation of the Factors Governing Ice-Asphalt Interfacial Adhesion Strength: Insights from Pull-Off Tests and Molecular Simulations.
Article in Materials (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Under low-temperature and high-humidity conditions, stable ice layers readily form on asphalt pavements in cold regions, and the enhanced ice-asphalt interfacial adhesion significantly increases deicing difficulty and traffic safety risks. To clarify the factors governing ice-asphalt interfacial adhesion strength, this study combines macroscopic pull-off tests and molecular dynamics simulations to systematically investigate the effects of interfacial contact area, temperature, pull-off rate, and molecular characteristics of representative asphalt components. The pull-off results show that adhesion strength increases markedly with decreasing temperature, rising from approximately 163 kPa at -2 °C to 242 kPa at -10 °C. In contrast, the nominal adhesion strength decreases with increasing ice specimen size, suggesting that size-related interfacial heterogeneity and nonuniform stress transfer may contribute to the pull-off response. The adhesion strength also generally decreases as the pull-off rate increases. Molecular dynamics simulations show that smaller asphalt-ice interfacial models exhibit higher molecular-scale nominal adhesion responses, while temperature-dependent simulations provide short-range asphalt-ice interaction descriptors for interpreting the experimental temperature trend. The calculated short-range asphalt-ice interaction energy becomes less negative from -531.4 to -352.5 kJ mol
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