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Theses

Caractérisation du collage des interfaces de chaussées par essais de rupture en mode I

Abstract : Replacing the damaged bituminous pavement top-layers by ones with higher modulus is a common technique to extend their service life and an interesting solution to adapt roads to new uses. Among the various existing alternatives, the cement concrete (punctual case of the urban) or the most commonly one which is the reinforcement of bituminous pavement with glass fiber grid are used. Designing those complex multilayer structures and ensuring a good bonding between their layers are currently two major challenges. The objective of this thesis is to characterize the bond at the interface between asphalt layers and glass fiber grid using specimens extracted from actual field pavement. The fracture mode I test, named the Wedge Splitting Test (WST), is chosen. The geometry of the specimens is adapted in order to study the interfacial fracture behaviour of such materials assembled in a surface large enough to obtain a minimum of 3x3 meshes of the tested grids. Digital Image Correlation technique is used to monitor the debonding and its propagation. Tests are conducted under static condition with a constant imposed displacement rate at ambient air or underwater and controlled temperatures. The study of the debonding of interfaces with high resistance for the initiation shows the coherence, the simplicity and the validity of the WST results compared to those obtained previously in laboratory (static, fatigue) andin situ accelerated test. Applied to several materials of the ANR SolDuGri project, the numerous tests and various analyses of the WST allow differentiating with a promising way the bond characterization of the tested grids. They show the benefit of such a laboratory test.
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https://tel.archives-ouvertes.fr/tel-01962393
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Submitted on : Thursday, December 20, 2018 - 3:36:20 PM
Last modification on : Wednesday, October 14, 2020 - 4:00:51 AM
Long-term archiving on: : Friday, March 22, 2019 - 11:30:40 AM

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  • HAL Id : tel-01962393, version 1

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Maissa Gharbi. Caractérisation du collage des interfaces de chaussées par essais de rupture en mode I. Génie civil. École centrale de Nantes, 2018. Français. ⟨NNT : 2018ECDN0037⟩. ⟨tel-01962393⟩

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