Graphene oxide nanomaterials are increasingly used in various fields due to their superior properties.In order to study the influence of graphene oxide additives on the performance of modified asphalt,in this study,gr...Graphene oxide nanomaterials are increasingly used in various fields due to their superior properties.In order to study the influence of graphene oxide additives on the performance of modified asphalt,in this study,graphene oxide modified asphalt was prepared and characteristics was studied including the high deformation resistance performance and the self-healing property of modified asphalt.Functional groups and morphology of graphene oxide modified asphalt were described by Fourier transform infrared spectroscopy.The high deformation resistance performance and self-healing effect of asphalt samples were obtained through dynamic slear rheometer(DSR)test.Results shows that graphene oxide dispersions improve the performance of asphalt relatively well compared to graphene oxide powder.There is no chemical reaction between graphene oxide and asphalt,but physical connection.The addition of graphene oxide improved the high deformation resistance of modified asphalt and expedited the self-healing ability of asphalt under fatigue load.展开更多
通过旋转薄膜烘箱(RTFOT)对SBS改性沥青分别进行1.5、3和4.5 h的老化,并对老化后的试样分别添加西卡(XK)再生剂和改性信拓-3(XT-3)再生剂及不同掺量(4%、8%、12%)的再生剂制得再生沥青,然后对原样、不同老化时间及再生SBS改性沥青进行...通过旋转薄膜烘箱(RTFOT)对SBS改性沥青分别进行1.5、3和4.5 h的老化,并对老化后的试样分别添加西卡(XK)再生剂和改性信拓-3(XT-3)再生剂及不同掺量(4%、8%、12%)的再生剂制得再生沥青,然后对原样、不同老化时间及再生SBS改性沥青进行红外光谱(FTIR)分析。结果表明:SBS改性沥青在老化过程中亚砜基(S=O)官能团指数增大,丁二烯(CH 2=CH 2)基指数减小,老化时间延长,基质沥青老化加深,SBS改性剂不断降解;添加再生剂后亚砜基特征峰、官能团指数减小,普通再生剂的减小程度大于改性再生剂;XK再生剂在制备再生SBS改性沥青过程中再生剂的老化及SBS改性剂的降解程度大于XT-3;再生剂掺量为8%时,对1.5 h短期老化SBS改性沥青改善效果明显;再生剂对4.5 h RTFOT老化SBS改性沥青亚砜基指数恢复最大,3 h RTFOT老化SBS改性沥青恢复最小,恢复后的亚砜基指数几乎相等。展开更多
基金supported by Gansu Provincial Science and Technology Plan(23CXGA0195)Longnan Science and Technology Plan(2024CX03)。
文摘Graphene oxide nanomaterials are increasingly used in various fields due to their superior properties.In order to study the influence of graphene oxide additives on the performance of modified asphalt,in this study,graphene oxide modified asphalt was prepared and characteristics was studied including the high deformation resistance performance and the self-healing property of modified asphalt.Functional groups and morphology of graphene oxide modified asphalt were described by Fourier transform infrared spectroscopy.The high deformation resistance performance and self-healing effect of asphalt samples were obtained through dynamic slear rheometer(DSR)test.Results shows that graphene oxide dispersions improve the performance of asphalt relatively well compared to graphene oxide powder.There is no chemical reaction between graphene oxide and asphalt,but physical connection.The addition of graphene oxide improved the high deformation resistance of modified asphalt and expedited the self-healing ability of asphalt under fatigue load.
文摘通过旋转薄膜烘箱(RTFOT)对SBS改性沥青分别进行1.5、3和4.5 h的老化,并对老化后的试样分别添加西卡(XK)再生剂和改性信拓-3(XT-3)再生剂及不同掺量(4%、8%、12%)的再生剂制得再生沥青,然后对原样、不同老化时间及再生SBS改性沥青进行红外光谱(FTIR)分析。结果表明:SBS改性沥青在老化过程中亚砜基(S=O)官能团指数增大,丁二烯(CH 2=CH 2)基指数减小,老化时间延长,基质沥青老化加深,SBS改性剂不断降解;添加再生剂后亚砜基特征峰、官能团指数减小,普通再生剂的减小程度大于改性再生剂;XK再生剂在制备再生SBS改性沥青过程中再生剂的老化及SBS改性剂的降解程度大于XT-3;再生剂掺量为8%时,对1.5 h短期老化SBS改性沥青改善效果明显;再生剂对4.5 h RTFOT老化SBS改性沥青亚砜基指数恢复最大,3 h RTFOT老化SBS改性沥青恢复最小,恢复后的亚砜基指数几乎相等。
