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Experimental validation of the dual-oxidation routes in bituminous binders

Boekbijdrage - Hoofdstuk

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 bi-tumen, the fast-and the slow-rate route, reflecting on previous studies. Fourier-Transform Infrared (FTIR) and Electron Paramagnetic Resonance (EPR) spec-troscopy 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 afore-mentioned 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.
Boek: Proceedings of the RILEM International Symposium on Bituminous Materials : ISBM Lyon 2020
Pagina's: 903 - 909
ISBN:978-3-030-46454-7
Jaar van publicatie:2021
Trefwoorden:H1 Book chapter
Toegankelijkheid:Closed