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Influences des matières organiques sur les propriétés physiques et le comportement mécanique des sédiments de dragage en vue d’une valorisation dans les travaux publics

Abstract : In France, the road construction sector is the greatest consumer of granular materials, with a yearly consumption of about 200 million tons. With the shortage of standard materials, the valorization of dredged sediments for road construction could constitute an interesting solution.Dredged sediments generally consist of a mineral phase, an organic phase (in various forms) and a liquid phase (water). The presence of Organic Matter (OM) in sediments, even in small amounts, affects their engineering properties.The main objective of this study is to propose a simple method of characterization of organic materials adapted to the road construction and to study the effects of OM content on the physical and mechanical properties of dredged sediments. To this end, a specific methodology for reconstituting mixtures with different amounts of OM is proposed and an evaluation is made of existing tests for OM characterization. The investigation of the effects of OM content on physical and mechanical parameters (considered as key parameters in the field of road construction) shows that even for OM contents greater than the limits imposed in the guidelines for the use of standards materials, the dredged sediments remain compatible with the valuation in the road construction technique.
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Submitted on : Wednesday, July 15, 2020 - 11:45:11 AM
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  • HAL Id : tel-02899528, version 1

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Fawzi Hamouche. Influences des matières organiques sur les propriétés physiques et le comportement mécanique des sédiments de dragage en vue d’une valorisation dans les travaux publics. Génie civil. Ecole nationale supérieure Mines-Télécom Lille Douai, 2018. Français. ⟨NNT : 2018MTLD0002⟩. ⟨tel-02899528⟩

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