摘要
为研究沥青在水气-热耦合作用下的性能劣化特征,以90#基质沥青(90J)和TFOT老化沥青(90L)为对象,基于三大指标和布氏黏度、表面自由能和动态剪切流变实验研究了水气-热耦合作用对其基本性能、黏附性能和流变性能的影响规律,并通过红外光谱对其化学组成变化进行分析。结果表明,经过24 h的水气-热耦合作用,90J和90L均表现出针入度和延度下降,软化点和黏度上升,内部含氧基团增多,羧基和亚砜基峰值增高,表面自由能及其分量均降低,黏附性能劣化,内部弹性成分增多,黏性成分减少,抗疲劳性能降低,抵抗高温车辙能力增强的特征;相对于水气,温度对90L沥青的基本性能和黏附性能影响更显著。
In order to study the performance degradation characteristics of asphalt under the aging action of water vapor-thermal coupling,90#matrix asphalt(90J)and TFOT aging asphalt(90L)were regarded as the research object.The changes of basic properties,adhesion properties and rheological properties of 90J and 90L before and after water vapor-thermal coupling aging were studied by the routine test of the three major index tests and Brookfield viscosity test,surface free energy test and dynamic shear rheology test.The effect of water vapor-thermal coupling aging on 90J and 90L functional groups were analyzed by Fourier transform infrared spectra(FTIR).The results showed that after 90J and 90L at 24 h of water vapor-thermal coupling aging,the penetration and ductility decreased,and the softening point and viscosity increased,the internal oxygen groups increased,the carboxylic and sulfoxide peaks increased,the surface free energy and its components were reduced,the adhesion performance decreased,the internal elastic components increased,the viscosity composition was decreased,the fatigue resistance was reduced,and the ability to resist high temperature deformation was enhanced;compared with the water vapor,the temperature had a significant influence on the basic performance and adhesion performance of 90L asphalt.
作者
田耀刚
田锦
马荣辉
蒋静
纪括
贾侃
TIAN Yaogang;TIAN Jin;MA Ronghui;JIANG Jing;JI Kuo;JIA Kan(School of Materials Science and Engineering,Chang’an University,Xi’an 710064,China;Guangxi Baima Airport Expressway Co.,Ltd.,Nanning 530028,China)
出处
《应用化工》
CSCD
北大核心
2024年第12期2880-2885,共6页
Applied Chemical Industry
基金
中央高校基金(300102313207)
陕西省自然基金(2024JC-YBMS-426)
陕西省交通运输厅交通科技项目(22-40K,2021KJXX-80)。
关键词
沥青
水气-热耦合作用
黏附性
流变性
化学组成
asphalt
water vapor-thermal coupling
adhesive
rheological properties
chemical composition
