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Journal of Building Physics
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Identification of Liquid Pressure in Pores of Baked Clay Tiles During Freezing-Thawing Cycles

G. Wardeh

Technical Centre for Tiles and Bricks (CTTB), 200 Avenue du Général de Gaulle, 92140 Clamart, France, Laboratory for Materials and Durability of Constructions (LMDC), INSA Génie Civil, 135 Av de Rangueil 31077, Toulouse Cedex 04, France

B. Perrin

Laboratory for Materials and Durability of Constructions (LMDC), INSA Génie Civil, 135 Av de Rangueil 31077, Toulouse Cedex 04, France, perrin{at}insa-toulouse.fr

The durability of certain products used in roofing tiles depends on the boundary conditions during freezing as well as the texture of the porous material. The present article is an attempt to understand the effect of these boundary conditions on the physical state of the liquid phase during its solidification. From the experimental strains, the pressure developed in the porosity is calculated and thus the pressure of crystallization is identified. This step allows the pressure of the liquid phase to be deduced. For saturated products, the water is subjected to an overpressure during the freezing test and placing a wet cloth in contact with the tiles can increase its magnitude.

Key Words: freezing-thawing cycles • pore size distribution • pore pressure • crystallization pressure

Journal of Building Physics, Vol. 29, No. 4, 269-279 (2006)
DOI: 10.1177/1744259106063800
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