西南交通大学学报2026，Vol.61Issue(1)：52-64,13.DOI:10.3969/j.issn.0258-2724.20240059
泡沫沥青冷再生胶结料界面黏聚性的改善方法
Improvement Method of Interfacial Cohesiveness of Foam Asphalt Cold Recycled Binder
摘要
Abstract
To improve the cohesiveness of foam asphalt cold recycled binder(composed of cement,old asphalt,and foam asphalt),three modifiers of foam asphalt cold recycled binder,including polyphosphoric acid(PPA),polymerized styrene butadiene rubber(SBR),and triglyceride(TG)were selected,and molecular models of foam asphalt cold recycled binder with different modifiers and their dosage were established by molecular dynamics simulation method.The effect of different modifiers and their dosage on the improvement of the interface properties of foam asphalt cold recycled binder was studied based on interface energy,interaction energy,diffusion coefficient,and radial distribution function(RDF)of water molecules.The significance difference of each index and the weight of the modification scheme were discussed by significance tests and the analytic hierarchy process.The results have shown that the addition of 0.8%PPA has the most significant effect on the cohesiveness of the foam asphalt cold recycled binder,which can effectively improve the interfacial energy,free volume,and water damage of the foam asphalt cold recycled binder,and also make the foam asphalt cold recycled binder have better diffusion ability.The addition of 15.0%TG can improve the interaction effect of the foam asphalt cold recycled binder,but the diffusion ability is poor.The addition of 2.0%SBR has the best effect on the water damage resistance of foam asphalt cold recycled binder,but the overall modification effect of SBR is not so good.There is no significant influence among different dosages of modifiers,and each modification scheme is independent and has its own advantages.After comprehensive comparisons,0.8%PPA has the best effect on improving the interfacial cohesiveness of foam asphalt cold recycled binder.关键词
老化沥青/冷再生/黏聚性/分子动力学/改性沥青Key words
aged asphalt/cold recycle/cohesiveness/molecular dynamics/modified asphalt分类
交通工程引用本文复制引用
郭乃胜,王家伟,崔世超,刘世盟..泡沫沥青冷再生胶结料界面黏聚性的改善方法[J].西南交通大学学报,2026,61(1):52-64,13.基金项目
国家自然科学基金项目(51308084) 中央高校基本科研业务费专项(3132017029). （51308084）
