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Comportement mécanique évolutif des enrobés bitumineux à l'émulsion : étude expérimentale et modélisation

Abstract : Given a political context in which energy and environmental stakes have become increasingly dominant, road engineering practices have favoured saving energy and protecting the environment. Among these practices, the use of cold mixes treated with bitumen emulsion has proven to be a suitable technique. Cold mix design however, as well as the design of pavements including cold mix asphalt layers, is highly empirical and based on local skills. From prior experience, the transposition of established local rules from one site to another and their application to medium or heavy traffic pavements are not simple steps and tend to limit the development of this environmentally-friendly pavement technique. The first step in designing a pavement consists of knowing the stress-strain relationship of its constitutive materials in order to determine the stresses and strains generated by heavy lorry traffic. During a second step, these values must be compared with the mechanical durability of materials by reliance on damage tests comprising large numbers of load cycles. In the case of CMA, no mechanical behaviour law has been established to take into account both the fresh and cured states. This work aims to improve the knowledge acquired on this material. For this, an evolutiv model for the cold mix asphalt with bitumen emulsion incorporating the evolution of the material from its fresh state to its cured state has been developed. In addition, a new characterization test was developed and put in place to monitor the evolution of the reversible mechanical performance of the material. The results obtained from the test campaigns helped to calibrate the model and show the relevance of the model.
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Submitted on : Tuesday, August 27, 2019 - 3:08:07 PM
Last modification on : Friday, October 21, 2022 - 3:37:47 AM


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  • HAL Id : tel-02272136, version 1



Marion Lambert. Comportement mécanique évolutif des enrobés bitumineux à l'émulsion : étude expérimentale et modélisation. Génie civil. Université de Limoges, 2018. Français. ⟨NNT : 2018LIMO0113⟩. ⟨tel-02272136⟩



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