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Valorisation des cendres issues de la combustion du charbon de bois dans la fabrication de briques d’argile cuite

Abstract : The valorization of local building materials in developing countries, taking into account the energy an d environmental aspects through the use of waste is becoming more and more at the heart of the concerns of scientific research in the building sector. The purpose of this study is to evaluate the influence of wood ashes on the mechanical strengths and thermal insulation capacity of fired clay blocks for construction. Thus, varying percentages by weight of wood ash (0 to 60%) have been incorporated into the m ixtures for making fired compre ssed clay blocks; the mechanical strengths of the blocks thus produced were studied as well as their thermal conductiv ity, determined by the hot strip method. This work shows that, compared with the "C0" type blocks without the addition of wood ash (0%), the mechanical strengths of the "C10" type blocks with 10% wood ash, increased by 200% three - point bending tensile, red uced by 13% in compression and thermal conductivity also reduced by 9%. While at the level of "C20" type blocks incorporating 20% addition, there is a 15% increase in the three - point bending tensile strengths, a decrease of 28% in compressive strengths and 15% in thermal conductivity. The addition of 10 % to 20% of wood ash thus considerably improves the thermal conductivity and tensile strength by three - point bending of fired clay blocks but induces a loss of compressive strength not detrimental to the use of these materials as filling elements in buildings.
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https://hal.univ-lorraine.fr/hal-02985494
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Submitted on : Monday, November 2, 2020 - 11:34:58 AM
Last modification on : Wednesday, March 16, 2022 - 3:22:38 PM

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  • HAL Id : hal-02985494, version 1

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Gbènondésg Milohin, Malahimi Anjorin, Victor Gbaguidi, André Donnot, Riad Benelmir. Valorisation des cendres issues de la combustion du charbon de bois dans la fabrication de briques d’argile cuite. revue internationale des sciences appliquées, 2018, 1 (2), pp.3-10. ⟨hal-02985494⟩

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