The broad characterisation with many techniques of the chemical / rheological properties of bitumen is rather challenging and complex, even more as these properties change during ageing and by using additives. Therefore, it would be highly desirable to reduce the analytical effort by using chemometrics to predict these properties. Here, we present a chemometrical study based on mid-infrared (MIR) and 1H-time-domain-nuclear magnetic resonance (TD-NMR) spectroscopy. The MIR spectra were correlated with various chemical and rheological bitumen properties. A high predictive power could be evidenced for the asphaltene content as well as for rheological parameters (BTSV, elastic recovery of the multiple stress creep recovery, and the softening point). Furthermore, the chemometrical approach could successfully be used to differentiate with high accuracy between fresh and aged samples as well between unmodified bitumen and bitumen modified with different additives. Initial studies based on TD-NMR also yielded good models for most of the parameters under investigation.

许多技术对沥青的化学/流变性质进行广泛表征是颇具挑战性和复杂性的，甚至随着老化过程中这些性质的变化和使用添加剂的改变而更加复杂。因此，非常需要通过使用化学计量学来预测这些性质来减少分析工作。在这里，我们提出基于中红外（MIR）和1H时域核磁共振（TD-NMR）光谱的化学计量学研究。MIR光谱与各种化学和流变沥青性质相关。沥青质含量和流变参数（BTSV，多重应力蠕变回复率的弹性回复率和软化点）的预测能力高。此外，化学计量学方法可以成功地用于在新鲜样品和陈化样品之间以及未改性沥青和用不同添加剂改性的沥青之间进行高精度区分。基于TD-NMR的初步研究还为所研究的大多数参数提供了良好的模型。