Search results for "Microstructural characterization"

showing 2 items of 2 documents

On the hydro-mechanical behaviour of a lime-treated embankment during wetting and drying cycles

2018

Abstract The paper presents some experimental results obtained on samples extracted from a full-scale embankment obtained by compacting a lime-treated clayey soil. A comprehensive test programme was carried out in order to highlight the improvement of mechanical behaviour induced by lime treatment as well as to assess the durability of the improved material, which may be affected by severe seasonal wetting and drying cycles. Direct shear tests, triaxial compression tests, swelling potential measurement and oedometric tests were performed on samples cured in controlled environmental conditions for at least 18 months. Wetting and drying cycles were applied in a very wide range of suction valu…

Materials scienceWeathering0211 other engineering and technologies020101 civil engineering02 engineering and technologyLime-treated clay0201 civil engineeringmedicineGeotechnical engineeringComputers in Earth SciencesSafety Risk Reliability and QualitySoftening021101 geological & geomatics engineeringShrinkageMicrostructural characterizationGeotechnical Engineering and Engineering GeologyOedometric testDurabilityShear strengthPozzolanic reactionDirect shear testWettingSwellingmedicine.symptomWetting and drying cycleSaturation (chemistry)Geomechanics for Energy and the Environment
researchProduct

Hydro-Mechanical Behaviour of a Sand-Bentonite Mixture for the Confinement of Nuclear Wastes

2019

The established concept for the protection of the biosphere from high-level nuclear wastes consists in the use of multi-barrier systems in deep geological repository, for which clayey geomaterials are key elements. Bentonite-based materials are selected as buffer and backfilling materials. Once in place, the barriers will be subjected to a series of severe loadings, including strong variations of suction (i.e. wetting and drying cycles). The paper presents selected results from a large ongoing research work to investigate the behaviour of bentonite-based materials in the context of nuclear waste disposal. In particular, the paper focuses on the response of a Sand/Bentonite mixture under dif…

Nuclear wasteSuctionRadioactive wasteContext (language use)Microstructural characterizationBentonite-based materialHydro-mechanical behaviourBentoniteDeep geological repositorymedicineEnvironmental scienceWater retention behaviourGeotechnical engineeringWettingSwellingmedicine.symptomDry density
researchProduct