| People | Locations | Statistics |
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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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Bergh, Wim Van Den
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2022Thermal performance of a controllable pavement solar collector prototype with configuration flexibilitycitations
- 2021Introducing an improved testing method to evaluate the fatigue resistance of bituminous mortars
- 2021Investigation of the effect of short-term ageing on rejuvenated reclaimed asphalt binder
- 2021Exploring the oxidative mechanisms of bitumen after laboratory short- and long-term ageingcitations
- 2021Influence of soft binder and rejuvenator on the mechanical and chemical properties of bituminous binderscitations
- 2020Cementitious binders and reclaimed asphalt aggregates for sustainable pavement base layerscitations
- 2020Experimental investigation of the oxidative ageing mechanisms in bitumencitations
- 2018Recycling. In : Testing and Characterization of Sustainable Innovative Bituminous Materials and Systemscitations
- 2017The influence of mixture composition, adhesion promotor and compaction degree on the groove stability of grooved Marshall asphaltcitations
- 2016Identification of pavement material properties using a scanning laser Doppler vibrometercitations
Places of action
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article
Experimental investigation of the oxidative ageing mechanisms in bitumen
Abstract
<p>Oxidative ageing in bituminous materials is considered one of the most important factors for distress types in road applications. This paper aims to offer insights into the validity of commonly held beliefs regarding the oxidation phases of ageing in bitumen, the fast- and the slow-rate phase, and explore the main oxidation products formed upon ageing. In order to evaluate possible differences between bitumen types, the penetration grade as well as the bitumen production process was varied. Thus, the ageing of three different binders was first studied by Fourier-Transform Infrared (FTIR) and Electron Paramagnetic Resonance (EPR) spectroscopy. The formation of oxygen-containing molecular structures on the bitumen surface during ageing was studied with Time-of-Flight Secondary Ion Mass Spectrometry (TOF-SIMS). The results of FTIR reveal a gradual increase of sulfoxides upon ageing, while the EPR results show an increase of organic carbon-centred radicals. In parallel, TOF-SIMS results provide evidence for an increase of oxygenated compounds, such as SO<sub>x</sub><sup>-</sup>-, HO<sub>x</sub><sup>-</sup>- and NO<sub>x</sub><sup>-</sup>-containing compounds. It appears also that paramagnetic metal species, such as vanadyl-porphyrins, are insusceptible during ageing. Overall, the findings of this study are in agreement with a mechanism comprising two rate-determining phases and support the formation of different oxygenated products. It is believed that the experimental approach used in this work may contribute further to an improved understanding of the ageing mechanisms in bitumen.</p>