Добірка наукової літератури з теми "COx claystone"
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Статті в журналах з теми "COx claystone":
Zeng, Zhixiong, Yu-Jun Cui, Nathalie Conil, and Jean Talandier. "Investigating the contribution of claystone to the swelling pressure of its mixture with bentonite." E3S Web of Conferences 195 (2020): 03043. http://dx.doi.org/10.1051/e3sconf/202019503043.
Song, Yang, C. A. Davy, P. Bertier, F. Skoczylas, and J. Talandier. "On the porosity of COx claystone by gas injection." Microporous and Mesoporous Materials 239 (February 2017): 272–86. http://dx.doi.org/10.1016/j.micromeso.2016.10.017.
Harrington, J. F., R. de la Vaissière, D. J. Noy, R. J. Cuss, and J. Talandier. "Gas flow in Callovo-Oxfordian claystone (COx): results from laboratory and field-scale measurements." Mineralogical Magazine 76, no. 8 (December 2012): 3303–18. http://dx.doi.org/10.1180/minmag.2012.076.8.43.
Xu, Hao, Jonny Rutqvist, Carlos Plúa, Gilles Armand, and Jens Birkholzer. "Modeling of thermal pressurization in tight claystone using sequential THM coupling: Benchmarking and validation against in-situ heating experiments in COx claystone." Tunnelling and Underground Space Technology 103 (September 2020): 103428. http://dx.doi.org/10.1016/j.tust.2020.103428.
Song, Yang, C. A. Davy, D. Troadec, A. M. Blanchenet, F. Skoczylas, J. Talandier, and J. C. Robinet. "Multi-scale pore structure of COx claystone: Towards the prediction of fluid transport." Marine and Petroleum Geology 65 (August 2015): 63–82. http://dx.doi.org/10.1016/j.marpetgeo.2015.04.004.
Yuan, Haifeng, Franck Agostini, Frédéric Skoczylas, and Jean Talandier. "About adsorption effects on the poroelastic properties and gas permeability of COx claystone." European Journal of Environmental and Civil Engineering 24, no. 2 (September 20, 2017): 267–82. http://dx.doi.org/10.1080/19648189.2017.1379444.
Wang, Chuanrui, Nicolas Gay, Jean Talandier, and Frédéric Skoczylas. "Poroelastic experiments on COx claystone: Insight from the Biot's coefficient measurement with water." Engineering Geology 300 (April 2022): 106580. http://dx.doi.org/10.1016/j.enggeo.2022.106580.
Bluthé, Joffrey, Benoît Bary, and Eric Lemarchand. "Micromechanical modeling of the Compression of the Damaged Zone experiment in the Callovo-Oxfordian formation." Advances in Geosciences 45 (July 24, 2018): 25–33. http://dx.doi.org/10.5194/adgeo-45-25-2018.
Zeng, Zhixiong, Yu-Jun Cui, Feng Zhang, Nathalie Conil, and Jean Talandier. "Effect of technological voids on swelling behaviour of compacted bentonite–claystone mixture." Canadian Geotechnical Journal 57, no. 12 (December 2020): 1881–92. http://dx.doi.org/10.1139/cgj-2019-0339.
Necib, Sophia, Fréderic Bumbieler, Claude Duret-Thual, Nicolas Bulidon, Didier Crusset, and Pierre Combrade. "Assessment of the resistance to environmentally assisted cracking (EAC) of C-steel casing and overpack in the COx claystone." Corrosion Engineering, Science and Technology 52, sup1 (April 28, 2017): 95–100. http://dx.doi.org/10.1080/1478422x.2017.1336003.
Дисертації з теми "COx claystone":
Ly, Bui Quoc Huy. "Contribution à l’étude des soutènements compressibles pour les ouvrages souterrains : Validation du modèle rhéologique SC2D pour l’argilite du COx et construction d’un modèle rhéologique Coqcéram pour le matériau compressible." Thesis, Rennes, INSA, 2018. http://www.theses.fr/2018ISAR0036/document.
The studies presented in this manuscript are part of Andra's CIGEO project concerning the construction and development of a new tunnel support for the gallery of the radioactive waste repository. The structure is located at a depth of approximately 500m at the site Meuse/Haute-Marne at Bure. The first part of this work concerns the establishment of a rheological model of Callovo-Oxfordian claystone named SC2D (Swelling Creep Diagenesis Damage). Traditionally, the calibration of rheological models for clay materials is based on laboratory tests from core samples. These samples are dàmaged by the hydromechanical discharge during sampling. This damage cannot be repaired by reconsolidation under in situ stress. This damage durably allers the hydromechanical characteristics of the claystone and generate new elasto-plastic mechanisms that do not exist on in situ claystone. The originality of the work in this first phase concerns the validation of the SC2D model of Callovo-Oxfordian healthy claystone from the simulation of the laboratory tests on core samples taking into account the whole loading history since the sampling until rupture. Then, the SC2D model "integrated" in the CLEO code is applied to the numerical simulations of the tunnel excavations of the Bure underground laboratory. The second part of the thesis concerns the participation in the qualification and the implementation of Andra (patent Andra and CMC) of a new compressible support allowing to absorb the anisotropie convergences of the tunnels excavated in the Callovo-Oxfordian claystone. This is a new support by segmental ring. Each segment is a sandwich comprising: • The reinforced concrete stiff lining. • The compressible material surmounting the stiff lining.• The protective shell to allow its transport and handling.The manufacture of compressible segments requires the addition of slurry (cernent doped with sand) for the holding of this compressible layer. This compressible support had to meet mechanical requirements defined by Andra. The tests presented in this thesis concern the analysis of consolidation tests carried out at EGC concerning the mechanical characterization at the level of the compressible layer. Different variables were studied, as well as tests of uniform loading on mode! reduced of the segmental ring. These tests will be presented and commented. A rheological model is established for the compressible material based on the Ganta Gravel model named Coqceram. The mechanical parameters of the Coqceram model are obtained from consolidation tests. The validation of the Coqceram model is carried out by comparing numerical simulations with model tests of a segmental ring. This numerical modeling required the "integration" of the Coqceram rheological model into the CLEO finite element code. After this validation, the modeling has been applied to two types of real size segmental rings set up in the Meuse/Haute-Marne underground laboratory. The first modeling focused on a classic segmental ring without compressible material set up immediately alter excavation. This modeling shows a very anisotropic ring stress distribution associated with a continual increase of the stresses. On the other hand, the modeling carried out with compressible segments shows a stress distribution much lower than the classic segment, especially more uniform
Tyri, Danai Panagiota. "Contribution à l'étude de mélange en pellets composé d'argilite COx et de bentonite MX80 pour le remplissage des stockages géologiques." Thesis, Lyon, 2021. http://www.theses.fr/2021LYSEI001.
The safe operation of the geological disposal facilities for radioactive waste indicates the galleries progressive closure, by installing sealing and backfill materials. The French disposal concept examines the crushed excavated Callovo-Oxfordian (COx) claystone with bentonite additive (MX80) as backfill material. One of the ongoing studied backfill solutions considers the pelletized implementation of the mixture, due to potential set-up advantages. The pelletized mixture is emplaced inside the galleries at dry state, presenting initially a granular structure, gradually homogenised, due to swelling upon hydration from the groundwater of the surrounding rock. Objective of the PhD thesis is the determination and manufacturing of the pelletized mixture, as well as the analysis of its hydro-mechanical behaviour. The pelletized granulometry is selected to result in the highest possible packing density, defining the optimum grain size distribution (GSD). The implemented COx/MX80 backfill needs to present hydro-mechanical properties capable of limiting the voids after the saturation on the drift as well as blocking the concrete movement when liners cracking will occur in the long-term. Numerical and experimental gravitational deposits are conducted, to study the compactness of a granular material, without mechanical compaction. Simulations using the Discrete Element Method (DEM) investigate the granulometric effect on the granular material’s packing state, determining an optimum GSD. Supplementary experiments are used to evaluate and finalise the granulometric selection maximising the resulting density. Both studies investigate the effect of additional parameters (implementation protocol, inter-particle friction, deposit height,…) on the packing state. The pelletization of the selected GSD is performed for the first time on COx/MX80 powdered mixtures, by applying the compression method on a reconditioned tablet machine. The process is analysed to successfully fabricate pellets and optimise the challenging pellet production. COx/MX80 mixtures hydro-mechanical behaviour is experimentally investigated by performing infiltration tests under free and confined volume conditions. A parametric study on various powdered mixtures is conducted to characterise the materials physicochemical properties and evaluate their swelling capacity at densities expected on the backfill implementation. On the other hand, the finalised pellets assembly on various compositions is directly tested in terms of swelling pressure and hydraulic conductivity
Zhang, Wang. "Contribution à l'étude expérimentale du comportement mécanique des argilites du Callovo-Oxfordien : effets du chemin de chargement et de la température." Thesis, Université de Lille (2018-2021), 2021. https://pepite-depot.univ-lille.fr/ToutIDP/EDENGSYS/2021/2021LILUN037.pdf.
Callovo-Oxfordian (COx) claystone has been investigated for several decades in France in the context of geological disposal of radioactive waste. A large number of laboratory tests and in-situ experiments have been conducted for the characterization of short and long thermo-hydromechanical behavior as well as gas flow diffusion property of this clayey rock. However, some aspects still need further investigation, among others, effects of loading paths and temperature on short and long-term mechanical responses. This thesis brings a new contribution to previous works on these open aspects. It is composed of three parts.In the first part, the influence of the loading path on the short-term mechanical behavior of COx claystone is considered. Based on theoretical analysis of stress path around the underground cavity, two particular loading paths with two different values of Lode angle are selected, namely lateral decompression and axial extension under constant mean stress. A series of tests with different values of mean stress are performed. Unloading-reloading cycles are involved in the tests. The obtained results are then analyzed and the emphasis is put on the influences of loading path (Lode angle) on the failure strength and induced damage process.The second part is devoted to studying the thermal effect on the short-term mechanical behavior of COx claystone. For this purpose, a series of laboratory tests, with both loading paths (axial extension and lateral decompression) and different values of temperature are performed. Based on the obtained results, the effects of temperature on the elastic property and failure strength are discussed for the two loading paths.In the third part, we are interested in investigating the effect of loading paths and temperature on the long-term mechanical behavior of COx claystone. A series of creep tests are then performed under two loading paths and with different values of temperature. The obtained test results are analyzed and discussed by putting the emphasis on the influences of loading path and temperature on creep deformation kinetics
Maia, Flávia Marina Serafim. "Impact de l'élévation de la temperature jusqu'à 80ºC sur le comportement des radionucléides dans le callovo-oxfordien : application à l'uranium." Thesis, Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2018. http://www.theses.fr/2018IMTA0078/document.
The aim of this study was to understand and quantify the behaviour of U(VI) on the Callovo-Oxfordian(COx) clay which is envisioned to host high-level radioactive waste in France. The temperature effect up to 80°C on this behaviour was particularly studied. The first part of the work focussed on the thermodynamic properties of the calcium uranyl carbonate aqueous complexes which govern U(VI) speciation in solution. They were measured indirectly by sorption-based methodologies under controlled pCO₂ and pH. The results indicate that the temperature does not favour the formation of CaUO₂(CO₃)₃²⁻ (log₁₀ βº₁₁₃ = 27,3 ± 0,3 ; ΔrHº = -27,4 ± 8 kJ/mol) and does not affect the formation of Ca₂UO₂(CO₃)₃(aq)(log₁₀ βº₂₁₃ = 29,7 ± 0,3 ; ΔrHº = 0 ± 2 kJ/mol). A bottom-up approach with the published “2SPNE SC/CE”model was used for describing the sorption processes, with the assumption that the clay fraction of the COx (Illite, andI/S) governs U(VI) sorption.The model was successfully applied to reproduce a wealth of experimental data obtained with illite, the COₓ clay fractionand the COₓ clay rock as a function of key parameters (pH, pCO2, [U(VI)], [Ca]) at 20 °C. The sorption on COₓ conditions is mainly governed by the sorption of U(VI)-CO3 complexes and a new sorption constant is proposed for illite. An increase in temperature to 80 °C leads to an in-crease of U(VI) retention on COx. This increase is ac-companiedby a change of both pCO₂ and pH. The sorption model developed at 20 °C, together with the thermodynamic parameters describing U(VI) speciation in solution, can explain this increase but without obtaining a good agreement with the experiment. The model is improved by considering ΔrHº values for sur-face complexation reactions obtained for the U(VI))/illite system
Тези доповідей конференцій з теми "COx claystone":
Davy, Catherine A., F. Skoczylas, and J. Talandier. "Gas Migration through COx Claystone and Implications for Self-Healing." In Fifth Biot Conference on Poromechanics. Reston, VA: American Society of Civil Engineers, 2013. http://dx.doi.org/10.1061/9780784412992.191.
Harrington, J. F., R. C. Cuss, D. J. Noy, and J. Talandier. "Processes Governing Advective Gas Flow in the Callovo Oxfordian Claystone (COx)." In Fourth EAGE Shale Workshop. Netherlands: EAGE Publications BV, 2014. http://dx.doi.org/10.3997/2214-4609.20140026.
Schaefer, F., and G. E. Pickup. "CO2 Plume Behaviour in a Cyclic, Fining Upward Clastic Sequence – Do the Claystone Intervals Seal?" In 2nd EAGE International Conference on Fault and Top Seals - From Pore to Basin Scale 2009. European Association of Geoscientists & Engineers, 2009. http://dx.doi.org/10.3997/2214-4609.20147204.