In order to understand the performance difference of SBS modified asphalt before and after UV aging,the high and low temperature rheological properties and microstructure of SBS modified asphalt before and after UV aging were tested by dynamic shear rheometer(DSR),bending beam rheometer(BBR),atomic force microscope(AFM),and the macro and micro indexes were correlated by the Pearson's correlation analysis.The results show that:the asphaltene content of SBS modified asphalt increases after UV aging,resulting in increased elasticity,which improves the rutting resistance of asphalt at high temperatures;the low-temperature performance of SBS modified asphalt decreases with the increase of UV aging time,and water improves the low-temperature performance of the asphalt to a certain extent;the degree of undulation of SBS modified asphalt after UV aging increases,and surface roughness Ra and Young's modulus increase;Pearson correlation analysis results show that the macro and micro indicators have good correlation,and it is feasible to use the combined test method of the macro and micro to evaluate the performance changes of SBS modified asphalt before and after UV aging.
SBS modified asphaltultraviolet agingrheological propertiesmicrostructureatomic force microscope
万方数据
维普
