Chemo-rheological characterization of bitumen ageing based on multivariate analysis combined with variable selection methods

Ma, Lili; Varveri, A.; Erkens, S.M.J.G.

Chemo-rheological characterization of bitumen ageing based on multivariate analysis combined with variable selection methods

Book chapter (2024)

Authors

Lili Ma Pavement Engineering

A. Varveri Pavement Engineering

S.M.J.G. Erkens Pavement Engineering

Research Group

Pavement Engineering

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Published Date

2024

Language

English

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Research Group

Pavement Engineering

Abstract

This study aims to correlate the chemical and rheological properties of bitumen at different ageing states and understand the chemical mechanisms of bitumen degradation due to ageing. The relationship between Fourier transform infrared (FTIR) spectral data and rheological results is investigated using partial least squares (PLS) regression integrated with two variable selection methods. The spectral region of 1800 – 800 cm1 is identified as the most informative for accurate estimation of the rheological properties of bitumen. Variable selection methods, particularly moving windows (MW), improve the prediction accuracy of the regression models.

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