Publication de 12 numéros par an
ISSN Imprimer: 1091-028X
ISSN En ligne: 1934-0508
Indexed in
Experimental Investigations of Diffusive and Convective Transport of Inert Gas through Cement Pastes
RÉSUMÉ
In the context of the temporary near-surface storage of intermediate-level radioactive wastes, different concepts of waste packages are considered. Most of them are composed of an external container, made of fiber reinforced concrete, receiving several primary waste packages. Self-radiation of encapsulating matrices can lead to the continuous production of hydrogen, which, for obvious safety reasons, must be drained out of the container. Concrete, seen as an heterogeneous porous medium, can offer a path for gas transfer through its porosity. Then, the transport mechanism depends mainly on the production rate: the diffusion process takes place for a low production rate of hydrogen whereas permeation corresponds to a high production rate. This paper focuses on transport properties of the cement paste, which is the main porous component in concrete. The experimental investigation of gas diffusion and permeation through the cement paste porosity shows that the gas transfer ability of the material depends on two interdependent factors: the water saturation state and the microstructural properties of the material. In the context of cement-based materials, these two dimensioning parameters are mainly controlled by the formulation of the cement paste as well as the curing and operating conditions. The influence of these parameters on the diffusion and permeation properties of the cement pastes is experimentally evaluated.
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Vu Thai Hoa, Frizon Fabien, Lorente Sylvie, Architecture for gas transport through cementitious materials, Journal of Physics D: Applied Physics, 42, 10, 2009. Crossref
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Siddheshwar P. G., Bhadauria B. S., Srivastava Alok, An analytical study of nonlinear double-diffusive convection in a porous medium under temperature/gravity modulation, Transport in Porous Media, 91, 2, 2012. Crossref
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Boher Cédric, Frizon Fabien, Lorente Sylvie, Bart Florence, Influence of the pore network on hydrogen diffusion through blended cement pastes, Cement and Concrete Composites, 37, 2013. Crossref
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Lambertin David, Frizon Fabien, Bart Florence, Mg–Zr alloy behavior in basic solutions and immobilization in Portland cement and Na-geopolymer with sodium fluoride inhibitor, Surface and Coatings Technology, 206, 22, 2012. Crossref
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Bhadauria B. S., Siddheshwar P. G., Kumar Jogendra, Suthar Om P., Weakly Nonlinear Stability Analysis of Temperature/Gravity-Modulated Stationary Rayleigh–Bénard Convection in a Rotating Porous Medium, Transport in Porous Media, 92, 3, 2012. Crossref
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Boher Cédric, Martin Isabelle, Lorente Sylvie, Frizon Fabien, Experimental investigation of gas diffusion through monomodal materials. Application to geopolymers and Vycor® glasses, Microporous and Mesoporous Materials, 184, 2014. Crossref
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Chomat Laure, Amblard Etienne, Varlet Jérôme, Blanc Cécile, Bourbon Xavier, Passive corrosion of steel reinforcement in blended cement-based material in the context of nuclear waste disposal, Corrosion Engineering, Science and Technology, 52, sup1, 2017. Crossref
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Frizon F., Gin S., Jegou C., Mass Transfer Phenomena in Nuclear Waste Packages, in Advances in Transport Phenomena, 1, 2009. Crossref
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Dutzer Vincent, Dridi Wissem, Poyet Stéphane, Le Bescop Patrick, Bourbon Xavier, The link between gas diffusion and carbonation in hardened cement pastes, Cement and Concrete Research, 123, 2019. Crossref
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Boher C., Lorente S., Frizon F., Bart F., Simulation of Gas Hydrogen Diffusion Through Partially Water Saturated Monomodal Materials, in Cement-Based Materials for Nuclear Waste Storage, 2013. Crossref
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Nield Donald A., Bejan Adrian, Internal Natural Convection: Heating from Below, in Convection in Porous Media, 2013. Crossref
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Kangni-Foli E., Poyet S., Le Bescop P., Charpentier T., Bernachy-Barbé F., Dauzères A., L'Hôpital E., d'Espinose de Lacaillerie J.-B., Carbonation of model cement pastes: The mineralogical origin of microstructural changes and shrinkage, Cement and Concrete Research, 144, 2021. Crossref