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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Soenen, Hilde
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2021Determination of bitumen coverage, after the rolling bottle test, by a digital image processing method
- 2021Exploring the oxidative mechanisms of bitumen after laboratory short- and long-term ageingcitations
- 2021Experimental Validation of the Dual-Oxidation Routes in Bituminous Binderscitations
- 2020Outcomes from RILEM TC 237-SIB TG1 on the affinity between aggregates and bituminous binders
- 2020Experimental investigation of the oxidative ageing mechanisms in bitumencitations
- 2019Visualization and chemical analysis of bitumen microstructurescitations
- 2018Bituminous Bindercitations
- 2018Low-temperature rheological and morphological characterization of SBS modified bitumencitations
- 2018An empirical constitutive model for complex glass-forming liquids using bitumen as a model materialcitations
- 2018Bituminous bindercitations
- 2016Oxidation of bitumencitations
- 2016Oxidation of bitumen:molecular characterization and influence on rheological propertiescitations
- 2013Differential scanning calorimetry applied to Bitumen: results of the RILEM NBM TG1 round robin testcitations
- 2006Influence of thermal history on rheological properties of various bitumencitations
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article
Exploring the oxidative mechanisms of bitumen after laboratory short- and long-term ageing
Abstract
<p>Understanding the fundamental mechanisms of oxidative ageing in bitumen is considered of paramount importance in order to take steps towards durable binders able to tackle distresses related to this phenomenon which deteriorates the asphalt performance. This paper focuses on the identification of the intermediate and final oxygenated products after short- and long-term laboratory ageing simulated with rolling thin-film oven testing (RTFOT) and pressurised ageing vessel (PAV) respectively. Three binders were investigated in this study, two originated from the same wax-free crude source, while the third was obtained from a different source, containing natural wax, and followed a different manufacturing process. Fourier-Transform Infrared (FTIR) spectroscopy demonstrated a clear increase of the sulfoxide and carbonyl functional groups upon ageing for all the binders independently of origin, manufacturing or performance. Electron Paramagnetic Resonance (EPR) spectroscopy showed an increase of the organic carbon-centred radicals after short-term ageing (RTFOT), whereas after PAV these radicals remained constant in the two wax-free binders originating from the same crude source, and even decreased for the third, waxy binder. Proton Nuclear Magnetic Resonance (<sup>1</sup>H NMR) spectroscopy reported differences in the relative distribution of protons between the binders in the unaged state, and similar minor changes after both ageing steps regardless of the binder's crude source and distillation. The results of Time-of-Flight Secondary Ion Mass Spectrometry (TOF-SIMS) revealed that SO<sub>x</sub>- and (OH)<sub>x</sub>-containing compounds are produced after the sequentially occurring short- and long-term ageing in both wax-free bitumens, whereas an almost constant behaviour of aliphatics after PAV ageing can be seen for the same bitumens. Finally, the strengths and weaknesses of each of these experimental techniques were reviewed and compared versus the obtained results and possible ageing mechanisms.</p>