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.
|Title of host publication||Proceedings of the RILEM International Symposium on Bituminous Materials|
|Editors||H. Di Benedetto, H. Baaj, E. Chailleux, G. Tebaldi, C. Sauzéat, S. Mangiafico|
|Place of Publication||Cham|
|Number of pages||7|
|Publication status||Published - 2021|
|Event||RILEM International Symposium on Bituminous Materials - Online conference, France|
Duration: 14 Dec 2020 → 16 Dec 2020
|Conference||RILEM International Symposium on Bituminous Materials|
|Abbreviated title||ISBM 2020|
|Period||14/12/20 → 16/12/20|
Bibliographical noteGreen 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.
- Oxidative ageing