聚氨酯前驱体/苯乙烯-丁二烯-苯乙烯复合改性沥青相容性分子动力学模拟研究

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【中图分类号】：U414 【文献标志码】：A 【文章编号】：1008-3197（2025）02-66-07

【DOI编码】：10.3969/j.issn.1008-3197.2025.02.015

Molecular Dynamics Simulation Study on Compatibility of PRM-SBS Compound Modified Asphalt

XU Li

（ChinaRailway16th Bureau Group Road and Bridge EngineeringCo.Ltd.，Beijing 1O15Oo，China）

【Abstract】： Through experimental investigation explores thecompatibilityof polyurethane precursor（PRM）and styrenebutadiene-styrene（SBS）composite-modified asphalt and its impactonstorage stability，PRM significantly enhances the compatibility of SBS-modified asphalt.Furthermore，molecular dynamics simulations validate the favorable compatibility between PRMand asphalt molecules，aswell as the diffusion capacity of SBS molecules within the asphalt system，the composite modification proves beneficial for strengthening the blending between modifiers and asphalt，thereby improving the modification effectiveness.

【Key words】： highway engineering ；compound modified asphalt； compatibility；molecular dynamics simulation

以沥青混凝土为主要材料的柔性路面是我国高等级路面首选；但沥青材料在温度、湿度和重复车辆荷载的耦合作用下，易产生诸如低温开裂、疲劳裂缝和高温车辙等典型病害，严重影响服役期内的路用性能。（剩余8560字）