High content SBS modified asphalt and its mixtures aging behavior
To investigate the aging resistance of highly concentrated SBS-modified asphalt and its mixtures,separate aging tests were conducted on the highly concentrated SBS-modified asphalt and base asphalt with a grade of 70#.Furthermore,asphalt rheological tests were performed to evaluate the elastic recovery,high-temperature deformation resistance,and fatigue performance of the highly concentrated SBS-modified asphalt before and after aging.Additionally,the high-temperature stability,resistance to rutting,and crack resistance of the asphalt mixtures were assessed before and after aging.Research results indicate that as the aging level deepens,the modulus of highly concentrated SBS-modified asphalt increases,while the elastic recovery performance,resistance to high-temperature deformation,and fatigue performance weaken.Moreover,the high-temperature stability and resistance to high-temperature deformation of the asphalt mixtures decrease,leading to a gradual deterioration in crack resistance.The interplay between asphalt oxidation hardening and SBS oxidation degradation exerts varying degrees of influence on the performance of highly concentrated SBS-modified asphalt and its mixtures.Despite highly concen trated SBS-modified asphalt has good aging resistance,it is crucial to pay extra attention to the performance decline resulting from aging.
万方数据
维普
