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Transfert d'eau liquide dans les parois du bâtiment

Abstract : The objective of this research is to study moisture transfer in the liquid phase in building walls by defining a new metrology to determine the liquid permeability coefficient of building materials. A theoretical part provides us with the present state of knowledge of the modelling of water transfer in liquid phase. It is supplemented with another part dealing with the methods used to measure or impose capillary pressures (or suctions), with particular focus on the osmotic method used later on to impose boundary conditions in terms of suction. This last part opens with a review of the methods intended to measure liquid permeability, and ends with the definition and development of a new method for measuring permeability, for which a patent was registered, which is based on the osmotic method and runs under steady-state conditions, measuring the input and output flow rates of the sample. A testing campaign is carried out on autoclaved aerated concrete with different couples of boundary conditions. An equation is then arranged relating liquid permeability and suction, a process which deserves careful and deeper thought. Finally, the new measuring method calls for improvement. Nevertheless, its operational character is obvious.
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Submitted on : Monday, October 4, 2010 - 2:44:41 PM
Last modification on : Friday, October 22, 2021 - 4:40:15 AM
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  • HAL Id : tel-00523174, version 1



Elie El-Chakar. Transfert d'eau liquide dans les parois du bâtiment. Mécanique []. Ecole Nationale des Ponts et Chaussées, 1994. Français. ⟨tel-00523174⟩



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