沥青在高温、氧化和水的作用下会发生一系列的物理及化学变化产生老化,进而影响沥青路面的路用性能。通过试验分析了沥青结合料在高温、氧化、水等作用下的老化性能,用DSC热分析法探讨了沥青氧化影响老化的机理,结果表明沥青的老化随高温程度、氧、水的作用而加深。文章还研究了沥青老化时测力延度指标的变化,其结果对评价改性沥青老化性能是有益的补充。 Asphalt under high temperature, oxidation and water under the action of a series of physical and chemical changes will occur aging, thereby affecting the road performance of asphalt pavement. The aging behavior of asphalt binder was analyzed through experiments under high temperature, oxidation and water. The mechanism of asphalt aging was discussed by DSC thermal analysis. The results show that the aging of asphalt is deepened with the action of high temperature, oxygen and water . The article also studied the change of the measured ductility index when the asphalt is aging, and the result is a useful supplement to evaluate the aging performance of the modified asphalt.