Search Results - "Andreas Jenni"

Reactive Transport Simulation of Low-pH Cement Interacting with Opalinus Clay Using a Dual Porosity Electrostatic Model by Andreas Jenni, Urs Mäder

“…Strong chemical gradients between clay and concrete porewater lead to diffusive transport across the interface and subsequent mineral reactions in both…”
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Concrete perturbation in a 13-year in situ concrete/bentonite interaction from FEBEX experiments. New insight of 2:1 Mg phyllosilicate precipitation at the interface by Gaboreau, Stephane, Rodríguez-Cañas, Enrique, Maeder, Urs, Jenni, Andreas, Turrero, Maria Jesús, Cuevas, Jaime

“…The Engineered Barrier System (EBS) implemented in full-scale experiments are designed to provide an understanding of the long-term performance of Deep…”
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Alteration of Bentonite Reacted with Cementitious Materials for 5 and 10 years in the Mont Terri Rock Laboratory (CI Experiment) by Shingo Yokoyama, Misato Shimbashi, Daisuke Minato, Yasutaka Watanabe, Andreas Jenni, Urs Mäder

“…The cement–clay interaction (CI) experiment was carried out at the Mont Terri rock laboratory to complement the current knowledge on the influence that…”
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Interaction of Corroding Iron with Eight Bentonites in the Alternative Buffer Materials Field Experiment (ABM2) by Paul Wersin, Jebril Hadi, Andreas Jenni, Daniel Svensson, Jean-Marc Grenèche, Patrik Sellin, Olivier X. Leupin

“…Bentonite, a common smectite-rich buffer material, is in direct contact with corroding steel in many high-level radioactive waste repository designs. The…”
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5-year chemico-physical evolution of concrete–claystone interfaces, Mont Terri rock laboratory (Switzerland) by Mäder, Urs, Jenni, Andreas, Lerouge, Cathérine, Gaboreau, Stephane, Miyoshi, Satoru, Kimura, Yukinobu, Cloet, Veerle, Fukaya, Masaaki, Claret, Francis, Otake, Tsubasa, Shibata, Masahito, Lothenbach, Babara

“…The Cement–Opalinus Clay Interaction (CI) Experiment at the Mont Terri rock laboratory is a long-term passive diffusion–reaction experiment between contrasting…”
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Coupling of porosity and diffusive transport in highly reactive systems: Open issues of reactive transport modelling by Jenni, Andreas, Gimmi, Thomas, Mäder, Urs

“…Mineral precipitation at interfaces between contrasting materials and porewaters decreases the local porosity and consequently reduces transport across the…”
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Percolation experiment across a 10-year-old interface between Opalinus Clay and Portland concrete by Bernard, Ellina, Jenni, Andreas, Toropovs, Nikolajs, Mäder, Urs

“…An interface sample between Portland concrete and Opalinus Clay with a contact time of 10 years recovered from a field experiment was investigated by SEM-EDX…”
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Corrigendum to “Chloride accessible porosity fractions across the Jurassic sedimentary rocks of northern Switzerland” [Appl. Geochem. 162 (2024) 105841] by Zwahlen, Carmen, Gimmi, Thomas, Jenni, Andreas, Kiczka, Mirjam, Mazurek, Martin, Van Loon, Luc R., Mäder, Urs, Traber, Daniel

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Micro-X-ray diffraction and chemical mapping of aged interfaces between cement pastes and Opalinus Clay by Bernard, Ellina, Jenni, Andreas, Fisch, Martin, Grolimund, Daniel, Mäder, Urs

“…The safety of a geological repository designed for deep storage of nuclear waste rests on the long-lived isolation properties of the geological environment and…”
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Chloride accessible porosity fractions across the Jurassic sedimentary rocks of northern Switzerland by Zwahlen, Carmen, Gimmi, Thomas, Jenni, Andreas, Kiczka, Mirjam, Mazurek, Martin, Van Loon, Luc R., Mäder, Urs, Traber, Daniel

“…The Jurassic clay-rich sedimentary sequence in northern Switzerland was investigated in the context of nuclear waste disposal. Tracer profiles across this…”
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Incorporating electrical double layers into reactive-transport simulations of processes in clays by using the Nernst-Planck equation: A benchmark revisited by Alt-Epping, Peter, Gimmi, Thomas, Wersin, Paul, Jenni, Andreas

“…Owing to their low permeability clay formations are considered as potential host rocks for nuclear waste or as seals capping permeable reservoirs for storing…”
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Coupling of chemical and hydromechanical properties in bentonite by Jenni, A., Mäder, U.

“…Bentonite plays a key role as buffer/backfill in many engineered barrier concepts for nuclear waste repositories and is required to perform over long periods…”
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Potential impact of cementitious leachates on the buffer porewater chemistry in the Finnish repository for spent nuclear fuel – A reactive transport modelling assessment by Pekala, Marek, Wersin, Paul, Pastina, Barbara, Lamminmäki, Ralf, Vuorio, Marja, Jenni, Andreas

“…Cementitious materials will be used during the construction and operation of a geological repository for spent nuclear fuel at Olkiluoto in Finland. Upon…”
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Interaction of Corroding Iron with Bentonite in the ABM1 Experiment at Äspö, Sweden: A Microscopic Approach by Wersin, Paul, Jenni, Andreas, Mäder, Urs K.

“…Bentonite and iron metals are common materials proposed for use in deep-seated geological repositories for radioactive waste. The inevitable corrosion of iron…”
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In situ interactions between Opalinus Clay and Low Alkali Concrete by Lerouge, Catherine, Gaboreau, Stéphane, Grangeon, Sylvain, Claret, Francis, Warmont, Fabienne, Jenni, Andreas, Cloet, Veerle, Mäder, Urs

“…A five-year-old interface between a Low Alkali Concrete (LAC) formulation (CEM III/B containing 66% slag and 10% nano-silica) and Opalinus Clay (OPA) from a…”
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Mechanisms and modelling of waste-cement and cement-host rock interactions

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Micro-scale Chemical Speciation of Highly Heterogeneous Cementitious Materials Using Synchrotron-based X-Ray Absorption Spectroscopy by André M. Scheidegger, Marika Vespa, Erich Wieland, Messaoud Harfouche, Daniel Grolimund, Rainer Dähn, Andreas Jenni, Karen Scrivener

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Molecular dynamics data for modelling the microstructural behaviour of compacted sodium bentonites by Navarro, Vicente, Yustres, Ángel, Jenni, Andreas, De la Morena, Gema, Asensio, Laura, López-Vizcaíno, Rubén, Cabrera, Virginia, Wersin, Paul, Mäder, Urs, Muuri, Eveliina, Niskanen, Mika, Akinwunmi, Bukunmi, Hirvi, Janne T., Pakkanen, Tapani A.

“…The water retention curve deduced with low water content data allows the modelling of the bentonite void ratio associated with the pores located inside the…”
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Coupling of chemical and hydromechanical properties in bentonite: A new reactive transport model by Jenni, Andreas, Meeussen, Johannes C.L., Pakkanen, Tapani A., Hirvi, Janne T., Akinwunmi, Bukunmi, Yustres, Ángel, Navarro, Vicente, López-Vizcaíno, Rubén, Muuri, Eveliina, Niskanen, Mika, Wersin, Paul, Mäder, Urs

“…The reactive transport framework ORCHESTRA was used to implement a dual porosity reactive transport system that accounts for mechanical processes relevant for…”
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Interaction of Corroding Iron with Bentonite in the ABM1 Experiment at Aespo, Sweden: A Microscopic Approach by Wersin, Paul, Jenni, Andreas, Maeder, Urs K

“…Bentonite and iron metals are common materials proposed for use in deep-seated geological repositories for radioactive waste. The inevitable corrosion of iron…”
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