Incorporating reclaimed asphalt (RA) in surface layer mixtures is still limited due to performance concerns, and it becomes even more challenging when combining aged polymer-modified bitumen (PMB) with virgin PMB. This study aims to evaluate, from a binder perspective, the feasibility of incorporating reclaimed polymer-modified binder (RPMB) in new surface layer mixtures. To address this challenge, blends of RPMB and virgin PMB were investigated at three replacement rates (20%, 40% and 60%) with and without a tall oil-based rejuvenator. First, the viscoelastic behaviour of the blends was assessed using a dynamic shear rheometer. Moreover, physicochemical changes were tracked using infrared spectroscopy and fluorescence microscopy. The experimental investigation revealed that, due to polymer degradation of the RMPB, only the blends with 20% RMPB exhibited polymer activity. Finally, the use of the rejuvenator compensated for the rheological properties of the aged RPMB and reduced the susceptibility to non-load-associated cracking.

由于性能方面的考虑，在表层混合物中掺入再生沥青（RA）仍然受到限制，并且在将老化的聚合物改性沥青（PMB）与原始PMB结合使用时，挑战甚至更大。这项研究旨在从粘合剂的角度评估将再生的聚合物改性的粘合剂（RPMB）掺入新的表面层混合物中的可行性。为了应对这一挑战，在有和没有高油基嫩肤剂的情况下，以三种替代率（20％，40％和60％）研究了RPMB和原始PMB的混合物。首先，使用动态剪切流变仪评估共混物的粘弹性行为。此外，使用红外光谱和荧光显微镜跟踪理化变化。实验研究表明，由于RMPB的聚合物降解，只有具有20％RMPB的共混物才显示出聚合物活性。最后，回春剂的使用补偿了老化的RPMB的流变性，并降低了非载荷相关裂纹的敏感性。