超声处置对SBS改性沥青抗疲劳和耐老化能力影响的分析OACSTPCD

In order to find ways to improve the fatigue resistance and aging resistance of SBS modified asphalt during long-term use,ultrasonic treatment was introduced into the field of SBS modified asphalt,and the changes of viscoelastic relationship,fatigue resistance and low temperature creep ability of SBS modified asphalt under different aging degrees before and after ultrasonic treatment were analyzed.The results show that ultrasonic treatment can reduce the viscoelastic ratio of SBS modified asphalt,enhance the sensitivity of SBS modified asphalt to strain,and slightly enhance the fatigue resistance of SBS modified asphalt in long-term service at a low dosage.The low temperature creep and stress relaxation ability decrease,and the modified asphalt becomes more brittle and hard.In the whole temperature range,the short-term aging resistance is slightly reduced,but the long-term aging resistance of the high and low temperature segments is slightly enhanced,and the effect is weakened with the increase of the dosage of SBS modifier.