Experimental Validation of the Dual-Oxidation Routes in Bituminous Binders

Georgios Pipintakos*, H. Y.Vincent Ching, Uwe Mühlich, Hilde Soenen, Sabine Van Doorslaer, Peter Sjövall, Aikaterini Varveri, Christophe Vande Velde, Xiaohu Lu

*Corresponding author for this work

Research output: Chapter in Book/Conference proceedings/Edited volumeChapterScientific


Oxidative ageing in bituminous materials is considered to be one of the most important factors for distress types in road applications. The increasing interest in oxidative ageing has highlighted the need for a thorough understanding of the oxidation mechanisms at molecular level. This paper offers some insight in the validity of the proposed hypotheses about the oxidation routes of bitumen, the fast- and the slow-rate route, reflecting on previous studies. Fourier-Transform Infrared (FTIR) and Electron Paramagnetic Resonance (EPR) spectroscopy were utilised for this verification. To elucidate the uncertain formation of sulfoxides, an additional surface investigation with Time-of-Flight Secondary Ion Mass Spectrometry (TOF-SIMS) was performed. The findings of the aforementioned techniques reveal the existence of the oxidation products reported previously and contribute to the understanding of the oxidation mechanisms. Overall, this research strengthens experimentally the hypotheses of the dual-oxidation routes of bitumen.

Original languageEnglish
Title of host publicationProceedings of the RILEM International Symposium on Bituminous Materials
EditorsH. Di Benedetto, H. Baaj, E. Chailleux, G. Tebaldi, C. Sauzéat, S. Mangiafico
Place of PublicationCham
Number of pages7
ISBN (Electronic)978-3-030-46455-4
ISBN (Print)978-3-030-46454-7
Publication statusPublished - 2021
EventRILEM International Symposium on Bituminous Materials - Online conference, France
Duration: 14 Dec 202016 Dec 2020

Publication series

NameRILEM Bookseries
ISSN (Print)2211-0844
ISSN (Electronic)2211-0852


ConferenceRILEM International Symposium on Bituminous Materials
Abbreviated titleISBM 2020
Internet address

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.


  • Bitumen
  • EPR
  • FTIR
  • Oxidative ageing


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