Chemical characterisation of bitumen type and ageing state based on FTIR spectroscopy and discriminant analysis integrated with variable selection methods

The chemical characterization of bitumen type and ageing state are fundamental in determining structural mechanical properties bitumen. This work aims to classify various types at different states identify the primary differences relevant classification. Fourier transform infrared (FTIR) spectral data eight five were analyzed using a chemometric procedure that incorporates principal component analysis (PCA), linear discriminant (LDA) models, variable selection methods. models presented results high accuracy differentiating state. show regions describe aliphatic aromatic bonds critical identification types. changes due mainly revealed region 1800 – 900 cm-1. method is instructive for properties.