... Published with permission by the ICE under the CC-BY 4.0 license. (http://creativecommons.org/licenses/by/4.0/) © 2022 Emerald Publishing Limited 2022 fabric/structure of soils laboratory tests permeability radioactive waste disposal soft rocks Gas transport issues are increasingly...

... of previous studies on smectite-rich clays. Fig. 1. Conceptual description of clay 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...

.... clays expansive soils geology laboratory tests mineralogy radioactive waste disposal Multi-barrier systems in geological disposal projects are being considered in many countries as a solution to dispose of high-level radioactive waste or spent nuclear fuel (e.g. JNC, 1999 ; SKB, 2011...

... radioactive waste disposal time dependence Many European concepts of deep geological disposal for radioactive waste involve a multi-barrier system consisting of canisters, natural geological barrier (host rock), concrete lining and sealing/backfilling elements. In most cases, compacted blocks...

...; (b) isostatic compression; (c) direct shear 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...

.... 07 09 2018 10 03 2020 © 2020 Thomas Telford Ltd 2020 constitutive relations fabric/structure of soils mineralogy partial saturation radioactive waste disposal As the laboratory tests measure a limited number of points of the water retention curve, to obtain a continuous...

.... The results of model prediction for unsaturated hydraulic conductivity of compacted bentonite are in close agreement with the experimental data over a large range of suction values. chemical properties clays microscopy permeability radioactive waste disposal water flow The interlayer water...

... in the laboratory also with a chilled mirror dew-point tensiometer (Decagon WP4). Fig. 1. Pellet at its initial state 05 05 2018 30 05 2019 © 2019 Thomas Telford Ltd 2019 expansive soils fabric/structure of soils numerical modelling radioactive waste disposal...

... 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...

... and to the bottom layer (h = 4·95 mm) at 352 h. In addition, although the swelling pressure reached the final stabilised value, the water content distribution still remained non-uniform after 1940 h of hydration. compaction expansive soils fabric/structure of soils microscopy radioactive waste...

..., the target RH was attained with a constant hydric loading rate (5%RH/min). In total, 11 hydric stages were carried out (Table 1). anisotropy clays deformation laboratory tests radioactive waste disposal Owing to the seasonal change of weather conditions (e.g. temperature, humidity, wind...

... waste disposal Fig. 5. Creep strains and permeability evolution in triaxial creep test of samples at P_c = 12 MPa As shown in Fig. 3 , the permeability of the COx claystone at RH = 59% and an effective confining pressure of 2 MPa is on the order of magnitude...

...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...

... at which the specimens lost contact with the cell (see the ‘Void ratio dependency of the water retention curves' subsection below). © 2014 Thomas Telford Ltd 2014 clays expansive soils fabric/structure of soils partial saturation particle-scale behaviour radioactive waste disposal...

... Telford Ltd 2014 landfills microscopy permeability radioactive waste disposal water flow Climate change impacts on waste management, particularly related to infiltration of rainwater through landfill caps protecting radioactive and other hazardous waste, is a growing concern. Thus...

.... 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...

... l'expansion de la bentonite, du côté « froid », et sa compression, 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...

...) créé chez UPC. La méthode a été appliquée pour l'identification de propriétés thermiques de l'argile schisteuse opale. numerical modelling permeability pore pressures radioactive waste disposal soft rocks temperature effects The concept of deep geological repository is considered...

...) . expansive soils full-scale tests numerical modelling partial saturation radioactive waste disposal temperature effects The use of deep geological repositories for the disposal of high-level nuclear waste has received considerable interest over the past two decades. Several national...

...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...