... permeability radioactive waste disposal soft rocks Gas transport issues are increasingly gaining importance in energy-related geotechnics, such as carbon capture and storage, the production of shale gas, and deep geological disposal of radioactive waste (e.g. Cevatoglu et al., 2015...

... erosion by swelling, particle detachment and transport of detached particles clays erosion expansive soils numerical modelling radioactive waste disposal Robust prediction of clay erosion is important for a range of geotechnical engineering problems: from clay erosion in embankments...

... was used, which reduced the test duration to less than 24 h. Evidence from experiments suggests that the swelling pressure cell is a powerful and inexpensive tool for studying the swelling behaviour of compacted bentonite. clays expansive soils geology laboratory tests mineralogy radioactive waste...

... Thomas Telford Ltd 2020 expansive soils fabric/structure of soils laboratory tests radioactive waste disposal time dependence As the hydration started, the synthetic water would fill up the technological voids and infiltrate into the compacted block from top, bottom and lateral sides...

... adhesion between the binder and the aggregates. 08 04 2019 03 04 2020 © 2020 Thomas Telford Ltd 2020 failure laboratory tests radioactive waste disposal rocks/rock mechanics shear strength tunnels & tunnelling Radioactive waste disposal is one of the key...

... & Alonso, 1992 ; Delage et al., 1998). 07 09 2018 10 03 2020 © 2020 Thomas Telford Ltd 2020 constitutive relations fabric/structure of soils mineralogy partial saturation radioactive waste disposal The soil water retention curve characterises the ability...

..., are considered macro pores (or inter-particle pores) and these are assumed to form the free pathways for long-range water transport (see Fig. 1). chemical properties clays microscopy permeability radioactive waste disposal water flow Despite significant efforts in the last few decades...

... numerical modelling radioactive waste disposal The MIP tests were performed on the mixture prepared at a dry density ρ_d = 1·49 Mg/m³ and saturated under constant-volume conditions. The PSD curves are shown in Fig. 7 . Two structural levels can be distinguished...

... used to fill up galleries and ensure long-term watertightness in deep radioactive waste disposal. Pellets/bentonite mixtures have a low permeability, high swelling capacity, good radionuclide retention capability and operational advantages in terms of placement in the galleries. Following a previous...

... radioactive waste disposal In many countries, deep geological disposal has been considered as one possible solution for the safe disposal of high-level radioactive waste. Compacted bentonite blocks are often used as buffer materials, placed between host rock and canister, due to their low permeability...

... anisotropy clays deformation laboratory tests radioactive waste disposal Owing to the seasonal change of weather conditions (e.g. temperature, humidity, wind, rainfall), clayey materials are often subjected to cyclic wetting and drying (W–D). During these W–D cycles, the materials swell...

... of experimental apparatus for realisation of hydro-mechanical coupling tests 09 05 2017 22 06 2017 © 2017 Thomas Telford Ltd 2017 clays creep failure laboratory tests permeability radioactive waste disposal Recently, some multi-stage creep tests have highlighted...

...Y.-G. CHEN; Y.-J. CUI; A.M. TANG; Q. WANG; W.-M. YE Compacted bentonite-based materials are often used as buffer materials in radioactive waste disposal. When the compacted bentonite blocks are emplaced, technological voids related to different interfaces involving the buffer material are created...

... particle-scale behaviour radioactive waste disposal Bentonites are under consideration as buffer and backfilling materials in deep geological repositories for the storage of high-level radioactive waste (HLW) (e.g. Bucher & Müller-Vonmoos, 1989 ; Gens, 2010 ; Ferrari et al., 2014...

... better than the climate change precipitation model. 20 9 2012 5 11 2013 © 2014 Thomas Telford Ltd 2014 landfills microscopy permeability radioactive waste disposal water flow Climate change impacts on waste management, particularly related to infiltration of rainwater...

.... This kind of material is being considered in the design of engineered barriers for radioactive waste disposal, because of its sealing and retention properties. From a geotechnical point of view, most of the analyses required to check the performance of the barrier are sensitive to the value considered...

... schisteuse opale. numerical modelling permeability pore pressures radioactive waste disposal soft rocks temperature effects When a heat source such as a radioactive waste canister is buried in a saturated rock, the temperature in the rock will increase. The rock skeleton and the pore water...

..., du côte « chaud », en utilisant un ensemble de paramètres unique. clays expansive soils laboratory tests numerical modelling radioactive waste disposal temperature effects A current approach for radioactive waste disposal involves surrounding canisters containing the waste...

... intégral de resaturation dans le cadre de l'examen du rendement d'un dépôt de déchets nucléaires à éliminer. expansive soils full-scale tests numerical modelling partial saturation radioactive waste disposal temperature effects Prior to construction, the granite rock had a temperature...

...A.-M. Tang; Y.-J. Cui Compacted expansive clays are often considered as a possible buffer material in high-level deep radioactive waste disposals. After the installation of waste canisters, the engineered clay barriers are subjected to thermohydromechanical action in the form of water infiltration...