Asphalt binder is a complex viscoelastic material. It implies that based on temperature and loading, its behaviour changes from a viscous material to an elastic material. Modification and ageing further add to this complexity. Over the years, a number of studies have examined all the aspects of polymer-modified binders (PMB), but there is still work needed to correlate the viscoelastic behaviour of the PMBs to their morphological behaviour. So, in the present study PMBs are prepared by modifying VG-10 base binder with the help of styrene butadiene styrene and ethylene vinyl acetate. Binders were aged using rolling thin-film oven test and pressure ageing vessel. Viscoelastic and morphological evaluation of binders was carried out by using dynamic shear rheometer and scanning electron microscopy (SEM), respectively. The test results showed that polymer modification enhances the thermorheological complexity of the base binders, while ageing does not affect it. Linear viscoelastic limits of the binders were found to be decreasing after ageing and modification. Ageing degrades the polymer network so after ageing PMBs were found to be behaving similar to base binder. The SEM results support these results.

中文翻译：

---

老化聚合物改性沥青粘合剂的粘弹性和形态评价

沥青结合料是一种复杂的粘弹性材料。这意味着基于温度和负载，其行为从粘性材料变为弹性材料。修改和老化进一步增加了这种复杂性。多年来，许多研究已经检查了聚合物改性粘合剂 (PMB) 的所有方面，但仍需要开展工作将 PMB 的粘弹性行为与其形态行为相关联。因此，在本研究中，在苯乙烯丁二烯苯乙烯和乙烯醋酸乙烯酯的帮助下，通过对 VG-10 基础粘合剂进行改性来制备 PMB。使用滚动薄膜烘箱测试和压力老化容器老化粘合剂。分别使用动态剪切流变仪和扫描电子显微镜 (SEM) 对粘合剂进行粘弹性和形态评估。测试结果表明，聚合物改性增强了基础粘合剂的热流变复杂性，而老化对其没有影响。发现粘合剂的线性粘弹性极限在老化和改性后降低。老化会降低聚合物网络，因此在老化后发现 PMB 的行为类似于基础粘合剂。SEM 结果支持这些结果。