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Dissertations / Theses on the topic 'Opalinus clay'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Pei, Jianyong 1975. "Effect of sample disturbance in opalinus clay shales." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/28302.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, February 2004.<br>Includes bibliographical references (p. 209-213).<br>The sample disturbance problem for different geomaterials is reviewed in this thesis. A general discussion on the disturbance sources and complexities of the disturbance problem is followed by detailed reviews on disturbance mechanisms and effects in soil and rock. This investigation leads to the conclusions that the combination of theoretical and physical modeling is an effective way to study the disturbance problem. Followi

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2

Joseph, Claudia. "The ternary system U(VI) / humic acid / Opalinus Clay." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-119365.

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The storage of nuclear waste in deep geological formations is discussed worldwide as the main strategy for nuclear waste management. To ensure the confinement of the nuclear waste, a multiple barrier system which consists of engineered, geo-engineered, and geological barriers will be applied. Thereby, in Germany the definition of the isolating rock zone represents an important safety function indicator. Clay rock is internationally investigated as potential host rock for a repository and represents a part of the geological barrier. In the present work, the natural clay rock Opalinus Clay from

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3

Pękala, Marek. "The mobility of ²³⁸U, ²³⁴U and ²³°Th radionuclides in the opalinus clay, Switzerland /." Bern : [s.n.], 2007. http://www.ub.unibe.ch/content/bibliotheken_sammlungen/sondersammlungen/dissen_bestellformular/index_ger.html.

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4

Ji, Yu Catherine Feng. "Comparative study of convective and diffusive transport phenomena within the opalinus clay of Mont Terri." Thesis, Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0409/document.

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La sûreté des installations de stockage profond des déchets radioactifs repose sur l’évaluation des propriétés de confinement de la barrière géologique et des processus qui y régissent le transport des radionucléides. La thèse est menée dans le cadre de l’expérience Deep Borehole du projet Mont Terri. Elle vise à renforcer l’évaluation de l’importance relative des phénomènes de transfert convectifs et diffusifs au sein de l’Argile à Opalines (OPA) et à apporter des éclaircissements concernant l’impact des phénomènes transitoires chimique et hydraulique sur ces transferts et la génération d’ano

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5

Laurich, Ben Verfasser], Janos [Akademischer Betreuer] [Urai, and Manuel [Akademischer Betreuer] Sintubin. "Evolution of microstructure and porosity in faulted Opalinus Clay / Ben Laurich ; János Urai, Manuel Sintubin." Aachen : Universitätsbibliothek der RWTH Aachen, 2015. http://d-nb.info/1130326489/34.

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6

Laurich, Ben [Verfasser], Janos [Akademischer Betreuer] Urai, and Manuel [Akademischer Betreuer] Sintubin. "Evolution of microstructure and porosity in faulted Opalinus Clay / Ben Laurich ; János Urai, Manuel Sintubin." Aachen : Universitätsbibliothek der RWTH Aachen, 2015. http://d-nb.info/1130326489/34.

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7

Schmeide, Katja, and Gert Bernhard. "Joint Project: Interaction and transport of actinides in natural clay rock with consideration of humic substances and clay organics - Characterization and quantification of the influence of clay organics on the interaction and diffusion of uranium and americium in the clay." Helmholtz-Zentrum Dresden-Rossendorf, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-85396.

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The objective of this project was the study of basic interaction processes in the systems actinide - clay organics - aquifer and actinide - natural clay - clay organics - aquifer. Thus, complexation, redox, sorption and diffusion studies were performed. To evaluate the influence of nitrogen, phosphorus and sulfur containing functional groups of humic acid (HA) on the complexation of actinides in comparison to carboxylic groups, the Am(III) and U(VI) complexation by model ligands was studied by UV-Vis spectroscopy and TRLFS. The results show that Am(III) is mainly coordinated via carboxylic gr

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8

Moll, Henry, Laura Lütke, Velina Bachvarova, et al. "Microbial Diversity in Opalinus Clay and Interaction of Dominant Microbial Strains with Actinides (Final Report BMWi Project No.: 02 E 10618)." Forschungszentrum Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-124643.

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For the first time microbial tDNA could be isolated from 50 g unperturbed Mont Terri Opalinus Clay. Based on the analysis of the tDNA the bacterial diversity of the unperturbed clay is dominated by representatives of Firmicutes, Betaproteobacteria, and Bacteriodetes. Firmicutes also dominate after treatment of the clay with R2A medium. Bacteria isolated from Mont Terri Opalinus Clay on R2A medium were related to Sporomusa spp., Paenibacillus spp., and Clostridium spp.. All further investigations are concentrated on the unique isolates Sporomusa sp. MT-2 and Paenibacillus sp. MT-2. Cells of the

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9

Yong, Salina. "A three-dimensional analysis of excavation-induced perturbations in the Opalinus Clay at the Mont Terri Rock Laboratory /." Zürich : Engineering Geology / Geological Institute / ETH Zürich, 2007. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17575.

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10

Houben, Maria Engelina [Verfasser]. "In situ characteriation of the microstructure and porosity of Opalinus Clay (Mont Terri Rock Laboratory, Switzerland) / Maria Engelina Houben." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2013. http://d-nb.info/1038680247/34.

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11

Monfared, Mohammad. "Couplages température-endommagement-perméabilité dans les sols et les roches argileux." Phd thesis, Université Paris-Est, 2011. http://pastel.archives-ouvertes.fr/pastel-00657206.

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Le stockage des déchets radioactifs dans les formations géologiques profondes peu perméables comme les argilites et les argiles plastiques est envisagée comme une solution possible et fait l'objet de nombreuses études depuis une trentaine d'années. Dans le cadre du projet européen TIMODAZ, l'accent a été mis sur l'étude des effets d'une augmentation de la température engendrée par les déchets exothermiques sur la zone endommagée autour d'une galerie souterraine de stockage. Dans le cadre de ce projet, une étude expérimentale sur le comportement thermique de l'argile de Boom et de l'argile à Op

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12

Joseph, Claudia [Verfasser], Gert Akademischer Betreuer] Bernhard, Jörg [Akademischer Betreuer] Steinbach, and Christian [Akademischer Betreuer] [Ekberg. "The ternary system U(VI) / humic acid / Opalinus Clay [[Elektronische Ressource]] / Claudia Joseph. Gutachter: Jörg Steinbach ; Christian Ekberg. Betreuer: Gert Bernhard." Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://d-nb.info/1068153431/34.

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13

Muñoz, Juan Jorge. "Thermo-hydro-mechanical analysis of soft rock. Application to a large scale heating test and large scale ventilation test." Doctoral thesis, Universitat Politècnica de Catalunya, 2007. http://hdl.handle.net/10803/6244.

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Esta Tesis está dirigida al análisis teórico y experimental de problemas acoplados Termo-Hidro Mecánico (THM) que se desarrollan en formaciones geológicas profundas destinadas al almacenamiento de residuos radiactivos de alta actividad. En las últimas décadas, han sido estudiadas las formaciones arcillosas para ser utilizadas como barreras geológicas debido a su reducida conductividad hidráulica. La degradación de las rocas arcillosas producida por efectos de temperatura y por efectos de variación en el grado de saturación, es un factor de fundamental importancia, que es actualmente investigad

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14

Schmeide, Katja, Katharina Fritsch, Holger Lippold, et al. "Joint project: Retention of radionuclides relevant for final disposal in natural clay rock and saline systems." Helmholtz-Zentrum Dresden - Rossendorf, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-197327.

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The objective of this project was to study the influence of increased salinities on interaction processes in the system radionuclide – organics – clay – aquifer. For this purpose, complexation, redox, sorption, and diffusion studies were performed under variation of the ionic strength (up to 4 mol/kg) and the background electrolyte. The U(VI) complexation by propionate was studied in dependence on ionic strength (up to 4 mol/kg NaClO4) by TRLFS, ATR FT-IR spectroscopy, and DFT calculations. An influence of ionic strength on stability constants was detected, depending on the charge of the respe

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15

Brix, Kristina [Verfasser], and Ralf [Akademischer Betreuer] Kautenburger. "Retention of elements relevant for a high-level nuclear waste disposal on Opalinus Clay as model for a host rock and Ca-bentonite as potential buffer and backfill material / Kristina Brix ; Betreuer: Ralf Kautenburger." Saarbrücken : Saarländische Universitäts- und Landesbibliothek, 2020. http://d-nb.info/1206178671/34.

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16

Lisjak, Bradley Andrea. "Investigating the Influence of Mechanical anisotropy on the Fracturing Behaviour of Brittle Clay Shales with Application to Deep Geological Repositories." Thesis, 2013. http://hdl.handle.net/1807/43649.

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Clay shales are currently being assessed as possible host rock formations for the deep geological disposal of radioactive waste. However, one main concern is that the favourable long-term isolation properties of the intact rock mass could be negatively affected by the formation of an excavation damaged zone (EDZ) around the underground openings. This thesis investigated the deformation and failure process of a clay shale, namely Opalinus Clay, with particular focus on the inﬂuence of anisotropy on the short-term response of circular tunnels. To achieve this goal, a hybrid continuum-discontinuu

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17

Ismael, Mohamed. "Inherent strength and stiffness anisotropy of laminated rocks." Doctoral thesis, 2018. http://tubaf.qucosa.de/id/qucosa%3A32251.

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The variation of rock strength and stiffness, known as mechanical anisotropy, is expected at different scales: large (rock mass) - or small (intact rock) - scales. It is always mandatory for engineering applications built either on or in anisotropic rock masses to investigate the strength and deformation behavior of those masses. To achieve this goal, continuum-based constitutive models are presented to analyze the mechanical anisotropy. One of both implemented models is named ‘Transubi model’ which considers the transverse isotropic elasticity into bi-linear Mohr-Coulomb strain hardening/soft

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