Asphalt binder ageing leads to significant changes in mechanical and physicochemical properties and often to premature cracking in asphalt pavements. A polymer-modified asphalt binder is repeatedly aged through laboratory techniques, i.e. rolling thin film oven test and pressure ageing vessel. The resulting properties of the aged binder are analysed using dynamic shear rheometer, Fourier transform infrared spectroscopy, atomic force microscopy and cryo-environmental scanning electron microscopy. Rheological, spectroscopic and macroscopic properties change progressively with the level of laboratory ageing. Surprisingly, this change shows approximately a linear trend. The first ageing step has the highest impact on the property change, whereas all the following ageing steps result in similar but reduced impact. Moreover, there is a strong interdependency between different mechanical and physicochemical properties. Hence, novel insights into the mechanics of asphalt binder ageing and into the search for ageing laws for asphalt binders.

沥青结合料老化会导致机械和物理化学性质发生显着变化，并经常导致沥青路面过早开裂。聚合物改性沥青结合料通过实验室技术反复老化，即滚动薄膜烘箱试验和压力老化容器。使用动态剪切流变仪、傅里叶变换红外光谱、原子力显微镜和低温环境扫描电子显微镜分析老化粘合剂的所得特性。流变学、光谱学和宏观特性随着实验室老化水平而逐渐变化。令人惊讶的是，这种变化显示出近似线性趋势。第一个老化步骤对性能变化的影响最大，而所有后续老化步骤的影响相似但影响较小。而且，不同的机械和物理化学特性之间存在很强的相互依赖性。因此，对沥青结合料老化力学和沥青结合料老化规律的探索有了新的见解。