摘要
采用熔融共混法制备了石墨烯/SBS改性沥青(GSMB),研究了石墨烯对SBS改性沥青压力老化(PAV)前后动态剪切流变性能的影响,并利用红外光谱(FTIR)分析了GSMB老化前后化学结构的变化。结果表明:石墨烯提高了SBS改性沥青的复数剪切模量,降低了相位角,增强了SBS改性沥青的抗永久形变能力;相比SBS改性沥青,GSMB在PAV老化后的复数剪切模量老化指数明显降低;FTIR显示SBS改性沥青老化后的羰基指数变化率、亚砜基指数变化率和碳碳双键指数变化率均随石墨烯掺量增加而减小,表明石墨烯能够有效改善SBS改性沥青的耐老化性能。
Graphene/SBS modified bitumen(GSMB)is prepared by melt blending method.The effect of graphene on the dynamic shear rheological properties of SBS modified bitumen before and after pressure aging vessel(PAV)are studied,and the changes of chemical structures of GSMB before and after aging are analyzed by Fourier transform infrared spectroscopy(FTIR).The results show that graphene can increase the complex shear modulus and reduce the phase angle of SBS modified bitumen,which indicate that the permanent deformation resistance of SBS modified bitumen is enhanced.Compared with SBS modified bitumen,the complex modulus aging index of GSMB after PAV ageing is significantly reduced.FTIR shows that the carbonyl index change rate,sulfoxide index change rate and carbon-carbon double bond index change rate of SBS modified bitumen after PAV aging are decreased with the increase of graphene content,which reveals that graphene could effectively improve the aging resistance of SBS modified bitumen.
作者
刘志航
姜蔚
汪林
黄小侨
韩晓斌
邵子奇
程帅
余剑英
LIU Zhi-hang;JIANG Wei;WANG Lin;HUANG Xiao-qiao;HAN Xiao-bin;SHAO Zi-qi;CHENG Shuai;YU Jian-ying(State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China;Research Institute of Petrochina Fuel Oil Co.Ltd.,Beijing 100195,China;Wuhan Hanyang Municipal Construction Group Co.Ltd.,Wuhan 430050,China)
出处
《公路》
北大核心
2022年第4期76-82,共7页
Highway
基金
中国石油天然气股份有限公司科技项目,项目编号RLY-2020Y-08。
关键词
道路工程
SBS改性沥青
石墨烯
老化
流变性能
road engineering
SBS modified bitumen
graphene
ageing
rheological properties
