Comptes Rendus
no. 5
Freezing and thawing porous media: experimental study with a dielectric capacitive method
[Étude du gel et dégel des milieux poreux par un capteur capacitif]

Présenté par : Michel Combarnous

Teddy Fen-Chong1  ; Antonin Fabbri1
1 Institut Navier, LMSGC, 2 allée Kepler, 77420 Champs-sur-Marne, France
Comptes Rendus. Mécanique, Volume 333 (2005) no. 5, pp. 425-430.

À l'aide d'un dispositif de sonde capacitive, on étudie le changement de phase eau/glace dans des milieux poreux consolidés soumis au gel et dégel. Cette technique exploite les propriétés diélectriques de l'eau, de la glace, de l'air, et du substrat minéral dans la gamme des fréquences radio. Elle permet d'obtenir directement les abaissements des températures de solidification et de fusion et indirectement la distribution des tailles de pores via la relation de Gibbs–Thomson. Elle devrait aussi fournir un moyen d'évaluer la teneur en eau liquide dans un milieu poreux en combinant un test en séchage et en gel.

A capacitive sensor-based apparatus has been used to study the ice/water phase change in consolidated porous media subjected to freezing and thawing. This technique relies on the dielectric properties of water, ice, air, and the mineral substrate in the radio-frequency range. It gives directly the freezing and thawing temperature depressions and indirectly provides an estimation of pore size distribution through the Gibbs–Thomson relation. It also holds good promise for evaluating the amount of liquid water in frozen porous media by combining drying and freezing tests.

Reçu le :
Accepté le :
Publié le :
DOI : 10.1016/j.crme.2005.01.007
Keywords: Porous media, Freezing, Thawing, Unfrozen water, Supercooling, Capacitive sensor, Dielectric, Cement
Mot clés : Milieux poreux, Gel, Dégel, Eau non-gelée, Surfusion, Capteur capacitif, Diélectrique, Ciment
Teddy Fen-Chong 1 ; Antonin Fabbri 1

1 Institut Navier, LMSGC, 2 allée Kepler, 77420 Champs-sur-Marne, France 
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Teddy Fen-Chong; Antonin Fabbri. Freezing and thawing porous media: experimental study with a dielectric capacitive method. Comptes Rendus. Mécanique, Volume 333 (2005) no. 5, pp. 425-430. doi : 10.1016/j.crme.2005.01.007. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2005.01.007/

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