With the ever-increasing awareness for sustainability, the utilization of reclaimed asphalt pavement (RAP) and recycled asphalt shingles (RAS) in asphalt paving has become more and more popular in recent years. To restore the rheological and other properties of aged binders, rejuvenators are commonly used during the asphalt mixtures production containing RAP and/or RAS. The conventional rejuvenation incorporation method is to blend the rejuvenators with virgin binder first, followed by mixing with other recycled materials. This paper presents a laboratory study on asphalt binder with a different rejuvenator application procedure, which blends the rejuvenators with the recycled materials first and then incorporates the blends with the virgin binder afterwards. Rheological and aging properties of asphalt binders blended with different procedures were analyzed through the dynamic shear rheometer (DSR) test and gel permeation chromatography (GPC) tests. Compared to the conventional method, it was revealed that the method by blending the rejuvenators with the recycled materials first significantly improved the workability of the binder blends during mixing. The new method resulted in a different rheological property and caused less aging effect for the asphalt binder blends in the short-term aging. However, for the long-term aging, the two incorporation methods exhibited similar aging effects on the binder blends.

随着对可持续性意识的不断提高，近年来，在沥青路面中使用再生沥青路面（RAP）和再生沥青瓦（RAS）的情况越来越普遍。为了恢复老化粘合剂的流变性和其他性能，在含有RAP和/或RAS的沥青混合物生产过程中通常使用再生剂。常规的复兴方法是先将新生剂与原始粘合剂混合，然后再与其他回收材料混合。本文介绍了使用不同再生剂应用程序的沥青粘合剂的实验室研究，该方法首先将再生剂与再生材料混合，然后再与原始粘合剂混合。通过动态剪切流变仪（DSR）测试和凝胶渗透色谱（GPC）测试，分析了按不同步骤混合的沥青粘合剂的流变和老化性能。与常规方法相比，揭示了通过将再生剂与再生材料共混的方法首先显着改善了混合过程中粘合剂共混物的可加工性。新方法导致了不同的流变性能，并且在短期老化中对沥青混合料的老化效果较小。然而，对于长期老化，两种掺入方法对粘合剂共混物表现出相似的老化效果。结果表明，通过将再生剂与再生材料共混的方法首先显着改善了混合过程中粘合剂共混物的可加工性。新方法导致了不同的流变性能，并且在短期老化中对沥青混合料的老化效果较小。然而，对于长期老化，两种掺入方法对粘合剂共混物表现出相似的老化效果。结果表明，通过将再生剂与再生材料共混的方法首先显着改善了混合过程中粘合剂共混物的可加工性。新方法导致了不同的流变性能，并且在短期老化中对沥青混合料的老化效果较小。然而，对于长期老化，两种掺入方法对粘合剂共混物表现出相似的老化效果。