关键词: 道路石油沥青;老化;红外光谱;凝胶渗透色谱

Abstract: The road petroleum asphalt , laboratory Pressure Vessel Aging ( PAV ) aging and long-term aging of asphalt pavement asphalt were chosed as the research object , the conclusion would be gotten from the study:Comparing with matrix asphalt and laboratory aging asphalt , the mechanical properties of SK90#asphalt changed significantly after using for a long time in the road , and that showed up as the penetration and ductility decreased while the softening point and viscosity increased .The analysis of fourier transform infrared spectrum and gel permeation chromatography shows that in the process of aging asphalt oxidized to form carbonyl group and sulfoxide group , and the small molecule chain decreases while the macromolecular chain increases;Then the thermogravimetric analyzer is used to determine the thermal stability of the asphalt before and after aging , find that thermal stability of the asphalt performance before and after aging basically remain unchanged .

Key words: road petroleum asphalt;aging;infrared spectrum;gel permeation chromatography