摘要
为了研究石墨烯橡胶复合改性沥青的老化性能,利用旋转薄膜烘箱(RTFOT)及压力老化箱(PAV)对石墨烯橡胶复合改性沥青试样进行短期老化及长期老化的室内模拟。采用橡胶沥青及基质沥青作为对比试验,将老化前后沥青试样的常规性能和微观性能进行对比分析。试验结果表明:石墨烯橡胶复合改性沥青在不同程度老化后,残留针入度比,软化点差及黏度老化指数相较于橡胶沥青及基质沥青显示出较强的抗老化性能。在微观试验中,石墨烯橡胶复合改性沥青亚砜基指数较小,耐老化性能得到明显改善,在荧光显微镜扫描中,石墨烯的添加在橡胶沥青中形成网状结构,并在老化后相较橡胶沥青较为稳定。
In order to study the aging performance of graphene rubber composite modified asphalt,the short-term aging and long-term aging of graphene rubber composite modified asphalt samples were simulated by RTFOT and PAV.Rubber asphalt and matrix asphalt were used as comparative tests to analyze the conventional and micro properties of asphalt samples before and after aging.The experimental results show that the penetration ratio,softening point difference and viscosity aging index of graphene rubber modified asphalt were stronger than those of rubber asphalt and base asphalt.In the micro test,the sulfoxide index of graphene rubber composite modified asphalt was small,and the aging resistance was improved obviously.In the fluorescence microscope scanning,the addition of graphene formed a network structure in the rubber asphalt,and it was more stable than rubber asphalt after aging.
作者
孟勇军
郭贺源
徐锐光
刘林林
MENG Yongjun;GUO Heyuan;XU Ruiguang;LIU Linlin(College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China;Key Laboratory of Ministry of Education for Disaster Prevention and Structural Safety,Nanning 530004, China;Special Geological Highway Safety Engineering Technology Research Center of Guangxi,Nanning 530004, China;JSTI Group,Nanjing 210000,China)
出处
《功能材料》
EI
CAS
CSCD
北大核心
2020年第8期8001-8006,共6页
Journal of Functional Materials
基金
国家自然科学基金资助项目(51968006)。
关键词
热老化
石墨烯
橡胶
亚砜基指数
荧光显微镜
thermophilic aging
graphene
rubber
sulfoxide index
fluorescence microscope
