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Évolution des propriétés rhéologiques des enrobés bitume, vers une loi vieillissement/viscosité

Abstract : This work is a contribution to the understanding of rheological properties of bitumen and their evolution under gamma irradiation. The prediction of swelling ratio is necessary to evaluate the state of the containers, particularly during the reversibility phase of the storage. The objective of this work is thus to establish the rheological data its evolution under irradiation in order to predict the container swelling with time. After the rheological and thermal characterization of pure bitumen, a series of extrusion trials has been carried out. The state of dispersion essentially depends on the ratio N/Q (screw speed to feed rate). Extreme values of N/Q show the highest yield stress, indicating an improved dispersion state. The industrial bitumen compound exhibits the highest viscosity compared to model compounds, which limits bubble migration. Finally, the effect of gamma irradiation on pure bitumen and compounds behaviour has been studied. External and structural modifications have been evidenced. A theoretical model based on Krieger-Dougherty equation has been developed and shows a good agreement with experimental data.
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Submitted on : Friday, September 30, 2011 - 11:38:56 AM
Last modification on : Wednesday, November 17, 2021 - 12:28:05 PM
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  • HAL Id : pastel-00628039, version 1


Mouhamad Mouazen. Évolution des propriétés rhéologiques des enrobés bitume, vers une loi vieillissement/viscosité. Matériaux. École Nationale Supérieure des Mines de Paris, 2011. Français. ⟨NNT : 2011ENMP0026⟩. ⟨pastel-00628039⟩



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