聚氨酯前驅(qū)體/苯乙烯-丁二烯-苯乙烯復(fù)合改性瀝青相容性分子動(dòng)力學(xué)模擬研究

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【中圖分類(lèi)號(hào)】：U414 【文獻(xiàn)標(biāo)志碼】：A 【文章編號(hào)】：1008-3197（2025）02-66-07

【DOI編碼】：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

以瀝青混凝土為主要材料的柔性路面是我國(guó)高等級(jí)路面首選；但瀝青材料在溫度、濕度和重復(fù)車(chē)輛荷載的耦合作用下，易產(chǎn)生諸如低溫開(kāi)裂、疲勞裂縫和高溫車(chē)轍等典型病害，嚴(yán)重影響服役期內(nèi)的路用性能。（剩余8560字）