ABSTRACT

In order to analyze the effects of freeze-thaw environment, multi-scale analysis (macro to micro) was applied to study the sustainable service performance for porous asphalt pavement in Sponge City (PASC). Based on the molecular simulation theory, the asphalt-water (ice) interaction was studied at the micro in the paper. Combined with the results of temperature melting and contact angle in macro experiments, the sustainable service performance for PASC under freeze-thaw environment was explained in multi-scale. The results show that the effects of freeze-thaw environment on PASC’s sustainable service performance are multi-scale. It is a process from macro to micro, including the fluctuation of interface transition zone, the change of contact angle, the melting of pore ice, the service performance of porous asphalt pavement and the sustainability of Sponge City. Additionally, the aging effect reduces the recovery ability of the service performance for PASC. The critical temperature (0°C) is more sensitive to the interaction between aged asphalt and water (ice). The research results reveal the multi-scale correlation of sustainable service performance for PASC, which has certain theoretical significance and practical value for the application and exploration of Sponge City in freeze-thaw region.

摘要

为了分析冻融环境的影响，应用多尺度分析（从宏观到微观）研究海绵城市（PASC）多孔沥青路面的可持续服务性能。本文基于分子模拟理论，对沥青-水（冰）相互作用进行了微观研究。结合宏观实验中温度熔融和接触角的结果，多尺度解释了PASC在冻融环境下的可持续使用性能。结果表明，冻融环境对PASC可持续服务绩效的影响是多尺度的。这是一个从宏观到微观的过程，包括界面过渡带的波动、接触角的变化、孔隙冰的融化、多孔沥青路面的使用性能和海绵城市的可持续性。此外，老化效应降低了 PASC 服务性能的恢复能力。临界温度（0°C）对老化沥青和水（冰）之间的相互作用更为敏感。研究结果揭示了PASC可持续服务绩效的多尺度相关性，对海绵城市在冻融地区的应用和探索具有一定的理论意义和实践价值。