再生SBS改性沥青的老化性能研究

Research on Aging Properties of Reclaimed SBS Modified Asphalt

为研究再生SBS改性沥青不同老化时间的老化程度和老化速率,以及与新SBS改性沥青的差异性,建立了再生SBS改性沥青和新SBS改性沥青的非线性微分老化方程,通过测定再生SBS改性沥青和新SBS改性沥青在不同TFOT老化时间后的粘度、针入度、软化点和延度指标,计算得到老化参数,根据老化方程和老化参数分析了再生SBS改性沥青的老化性能。研究结果表明,在老化初期,除延度外,再生SBS改性沥青的各项性能均比新SBS改性沥青衰减迅速,但在长时间老化后,2种沥青的各项性能趋于相同。

For the study of the aging degree and aging rate ofreclaimed SBS modified asphalt after aging different time,aging nonlinear differential equations of reclaimed SBS modified asphaltand new SBS modified asphalt were established,and after being aged different time,viscosity,penetration,softening point and ductility index of reclaimed SBS modified asphalt and new SBS modified asphalt were measured,and aging parameters were calculated,in order to analysis ofaging performance of reclaimed SBS modified asphalt according to the aging parameters and aging equations. The results show that,at the beginning of the aging,in addition to the ductility,Various performance of reclaimed SBS modified asphalt decay more rapidly than new SBS modified asphalt,while after aging for a long time,various performance tends to be the same.