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Analyse et caractérisation du comportement hygrothermique de parois agro-sourcées à l’échelle 1 : expérimentation et modélisation

Abstract : This thesis aims to enhance the use of bio-based materials such as concretes composed with hemp, flax or straw rapes, whose cultures are quite well developed at regional and national level. Due to their composition, these materials, plant-based aggregates associated with an inorganic matrix, have a high moisture sensitivity while retaining advantageous thermal performance. Their properties are indeed strongly associated with a high porosity, which gives them a great capacity to adsorb and release the water vapor contained in the surrounding atmosphere; this specificity comes interconnect with heat exchange of a wall or building. It is therefore essential to analyze the phenomena of coupled thermal and hygric transfers not only to determine the need for heating or for air exchanges, but also to apprehend occupant comfort and durability of construction. Built on many experimental trials, the main characteristics of the used materials are first specified. Then is specifically analyzed the behavior of a scaled wall, placed under stationary or variable conditions of humidity and / or temperature. Moreover, the properties of the materials provide, after implementation in a simulation model (SPARK) and experimental validation, a predictive approach of the hygrothermal behavior of a wall or a building envelope. Through a simplified model for a single zone room, is highlighted the influence of the hygric inertia of the materials on the relative humidity of the indoor atmosphere.
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https://hal.archives-ouvertes.fr/tel-03124318
Contributor : Mourad Rahim Connect in order to contact the contributor
Submitted on : Thursday, January 28, 2021 - 3:56:06 PM
Last modification on : Thursday, June 10, 2021 - 5:42:02 PM

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  • HAL Id : tel-03124318, version 1

Citation

Mourad Rahim. Analyse et caractérisation du comportement hygrothermique de parois agro-sourcées à l’échelle 1 : expérimentation et modélisation. Sciences de l'ingénieur [physics]. Université de Picardie Jules Verne (UPJV), Amiens, FRA.; Ecole doctorale en Sciences Technologie et Santé, 2015. Français. ⟨tel-03124318⟩

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