| 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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Cuisinier, Olivier
École Polytechnique Fédérale de Lausanne
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2023Statistical and Predictive Analyses of the Strength Development of a Cement-Treated Clayey Soilcitations
- 2022Energy pile skin friction at interface in clays under temperature cyclescitations
- 2018Impact of Severe Climate Conditions on Loss of Mass, Strength, and Stiffness of Compacted Fine-Grained Soils–Portland Cement Blendscitations
- 2018Impact of Severe Climate Conditions on Loss of Mass, Strength, and Stiffness of Compacted Fine-Grained Soils–Portland Cement Blendscitations
- 2014Long term behavior of lime-treated clayey soil exposed to successive drying and wettingcitations
- 2014Impact of high-pH fluid circulation on long term hydromechanical behaviour and microstructure of compacted clay from the laboratory of Meuse-Haute Marne (France)citations
- 2014Weathering of a lime-treated clayey soil by drying and wetting cyclescitations
- 2014Chemo-mechanical modelling of lime treated soilscitations
- 2013Identification of coupling parameters between shear strength behaviour of compacted soils and chemical's effects with an evolutionary-based data mining techniquecitations
- 2011Microstructure and hydraulic conductivity of a compacted lime-treated soilcitations
- 2010Chemo-mechanical couplings in compacted argillite submitted to high-pH environment
- 2009Shear strength behaviour of compacted clayey soils percolated with an alkaline solutioncitations
- 2008Microstructure of a compacted soil submitted to an alkaline PLUMEcitations
- 2006Suction Induced Effects on the Fabric of a Structured Soilcitations
- 2004Fabric evolution during hydromechanical loading of a compacted siltcitations
Places of action
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article
Shear strength behaviour of compacted clayey soils percolated with an alkaline solution
Abstract
In the French model of deep nuclear wastes repositories, the galleries should be backfilled with excavated argillite after the site has been filled. After thousands of years, the degradation of the concrete lining of the galleries will generate an alkaline solute (pHN12) that would circulate through the backfill. The goal of this paper is to describe the impact of such solute circulation on the properties of compacted argillite. Since additives (bentonite, sand or lime) are often introduced in the remoulded argillite for the backfill, such mixtures were also studied. Saturated-portlandite water was circulated through compacted samples for 3, 6 and 12 months at 60 °C. The shear strength behaviour of the samples was determined with triaxial tests. The microstructure of the samples was analysed via mercury intrusion porosimetry tests and scanning electron microscopy. The results showed that the influence of the alkaline fluid on the properties of the argillite is a function of the nature of the additive. In the case of the calcareous sand, no major changes were observed. The pure argillite underwent a slight decrease in its cohesion due to limited dissolution of its clayey particles. Conversely, intense alteration of the bentonite-argillite mixture was observed, and the shear strength behaviour was modified. Lime addition improved the mechanical characteristics of the argillite.