石墨烯/橡胶复合改性沥青-集料界面黏附性能及机理  

Interface adhesion performance and adhesion mechanism between graphene/rubber composite modified asphalt and aggregate

作　　者：林梅[1] 雷雨 李萍[1] 张强 LIN Mei;LEI Yu;LI Ping;ZHANG Qiang(School of Civil Engineering,Lanzhou University of Technology,Lanzhou 730050,Gansu,China;CCCC Second Highway Engineering Bureau Co.,Ltd.,Xi'an 710065,Shaanxi,China;Research and Development Center on Construction Technology of Long Bridge and Tunnel in Mountain Areas,CCCC,Xi'an 710199,Shaanxi,China;Gansu Provincial Highway Development Center,Lanzhou 730050,Gansu,China)

机构地区：[1]兰州理工大学土木工程学院,甘肃兰州730050 [2]中交第二公路工程局有限公司,陕西西安710065 [3]中交集团山区长大桥隧建设技术研发中心,陕西西安710199 [4]甘肃省公路事业发展中心,甘肃兰州730050

出　　处：《化工进展》2025年第2期991-1002,共12页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(52468066,52268070);甘肃省交通运输厅科技项目(2023-02,2022-04);兰州市人才创新创业项目(2022-RC-54)。

摘　　要：为探究石墨烯/橡胶复合改性沥青与集料的界面黏附性能及黏附机理,采用光电比色法和接触角法对石墨烯/橡胶复合改性沥青与集料的界面黏附性能进行了研究。利用分子动力学软件MS构建了沥青与集料的界面模型,以黏附功对沥青与集料的界面黏附性能进行了量化。从原子尺度对沥青与集料间的黏附机理以及温湿敏感性进行了分析研究。结果表明:集料种类对于黏附性能的影响要明显大于沥青种类对于黏附性能的影响;在碱性集料缺乏的地区,石墨烯/橡胶复合改性沥青与花岗岩的黏附性效果最优,因此此类地区推荐使用石墨烯/橡胶复合改性沥青作为沥青胶结料;石墨烯/橡胶复合改性沥青可以明显改善沥青与集料的黏附性能,随着集料氧化物碱性增强,沥青中的极性分子在集料表面从“倾斜分布”转为“平行分布”,从而增强沥青与集料间的黏附性能。本研究在微细观层面揭示了石墨烯/橡胶复合改性沥青与集料的界面黏附机理,旨在为石墨烯/橡胶复合改性沥青路面的设计提供指导。To investigate the interfacial adhesion performance and adhesion mechanism between graphene/rubber composite modified asphalt and aggregate,photoelectric colorimetry and contact angle method were used to study the interfacial adhesion performance between graphene/rubber composite modified asphalt and aggregates.The interfacial model of asphalt and aggregate was constructed by using the molecular dynamics software MS,and the interfacial adhesion properties of asphalt and aggregate were quantified in terms of the work of adhesion,while the effects of temperature and water on the interfacial adhesion properties of asphalt and aggregate were considered.The adhesion mechanism and temperature and humidity sensitivity between asphalt and aggregates were analyzed and studied at the atomic scale.The results showed that the adhesion effect between graphene/rubber composite modified asphalt and granite was the best.Therefore,it was recommended to use graphene/rubber composite modified asphalt as asphalt binder in areas lacking alkaline aggregates.Graphene/rubber composite modified asphalt can significantly improve the adhesion performance between asphalt and aggregates.As the alkalinity of aggregate oxides increased,the polar molecules in asphalt changed from“inclined distribution”to“parallel distribution”on the surface of aggregates,thereby enhancing the adhesion performance between asphalt and aggregates.In this study,the interfacial adhesion mechanism of graphene/rubber composite modified asphalt and aggregate was analyzed at the atomic level,which would provide guidance for the design of graphene/rubber composite modified asphalt pavement.

关 键 词：石墨烯 橡胶 分子动力学 界面黏附性 界面黏附机理 

分 类 号：U414[交通运输工程—道路与铁道工程]