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Book Chapter

Rock drying tests monitored by X-ray computed tomography – the effect of saturation methods on drying behaviour

By
B. Rousset-Tournier
B. Rousset-Tournier
Expert-Center pour la Conservation du Patrimoine Bâ6ti, EPFL VV MX-G, CH- 1015 Lausanne, Switzerland (e-mail: benedicte.rousset@epfl.ch)
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F. Mazerolle
F. Mazerolle
Laboratoire de Mécanique et d'Acoustique, Chemin Joseph Aiguier, F-13402 Marseille Cedex 20
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Y. Géraud
Y. Géraud
Centre de Géochimie de la Surface – EOST, 1 rue Blessig, F-67084 Strasbourg Cedex
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D. Jeannette
D. Jeannette
Centre de Géochimie de la Surface – EOST, 1 rue Blessig, F-67084 Strasbourg Cedex
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Published:
January 01, 2003

Abstract

Drying experiments were conducted under controlled conditions (relative humidity, temperature, motionless atmosphere) using Fontainebleau sandstone. X-ray computed tomography images acquired at various stages of the drying show that the location of water in the pore network depends on the method of initial saturation. After capillary absorption, the trapped air, or free porosity, allows the water distribution to be homogeneous and independent of the pore structure. This is because it homogenizes the tensions that apply to the water in the pores, regardless of the pore dimensions. However, this is not the case after a total saturation under vacuum. These differences are visible from the beginning to the end of the drying experiments. These results are important for curators or restorers of the architectural heritage, because they show that before testing a conservation product for stones, the method of saturation of these stones must be considered and attention should be given to the required effect.

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Contents

Geological Society, London, Special Publications

Applications of X-ray Computed Tomography in the Geosciences

F. Mees
F. Mees
Ghent University, Belgium
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R. Swennen
R. Swennen
Physico-chemical Geology, K. U. Leuven, Belgium
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M. Van Geet
M. Van Geet
SCK-CEN, Belgium
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P. Jacobs
P. Jacobs
Ghent University, Belgium
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Geological Society of London
Volume
215
ISBN electronic:
9781862394636
Publication date:
January 01, 2003

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