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Effect of Temperature on Moisture Migration in Earth and Fiber Mixtures for Cob Materials.

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Title: Effect of Temperature on Moisture Migration in Earth and Fiber Mixtures for Cob Materials.
Authors: Taouirte, Yousra1,2 (AUTHOR), Tiffonnet, Anne-Lise1 (AUTHOR), Marion, Michael1 (AUTHOR), Louahlia, Hasna1 (AUTHOR) hasna.louahlia@unicaen.fr, El Alami, Mustapha2 (AUTHOR), Gounni, Ayoub2 (AUTHOR), Lépinasse, Eric1 (AUTHOR), Voicu, Ionut1 (AUTHOR)
Source: Energies (19961073). Jul2023, Vol. 16 Issue 14, p5526. 23p.
Subjects: Building material testing, Temperature effect, Hygrothermoelasticity, Heat flux, Construction materials, Moisture
Abstract: This paper highlights the impact of environmental conditions on cob buildings. Different factors such as wall thickness, material permeability and interactions between moisture and heat fluxes can all have significant effects on the performance and durability of cob buildings. An experimental and modeling-based study was conducted on the hygrothermal characterization of cob building materials, which were obtained by mixing earth and fibers. Two types of cob materials that can be used as insulation and to form structural materials in buildings were tested. The effect of outside temperature on adsorption isotherms was investigated for both materials. The experimental data were fitted using the GAB model, after which a new correlation of water content correlation was proposed. Three specific configurations were investigated in which cob material was subjected to moisture transfer and a zero, positive or negative temperature gradient. Based on the resulting measurements, a high coupling effect between heat and moisture transfer inside the structural material was analyzed. A comparison of the experimental and modeling results demonstrated the satisfactory correlation and reliability of the developed model. Simulations were carried out for various wall thicknesses, in order to assess the effect of heat and moisture transfer on water content. The three scenarios were simulated and distributions of water content inside the walls were determined. The results show that the wall thickness of cob buildings and the direction of heat and moisture fluxes affect water content distribution in the structure. A greater thickness of the cob wall leads to higher water content, but this relationship reverses when the heat and moisture fluxes move in the same direction. [ABSTRACT FROM AUTHOR]
Copyright of Energies (19961073) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Effect of Temperature on Moisture Migration in Earth and Fiber Mixtures for Cob Materials.
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  Data: <searchLink fieldCode="AR" term="%22Taouirte%2C+Yousra%22">Taouirte, Yousra</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tiffonnet%2C+Anne-Lise%22">Tiffonnet, Anne-Lise</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Marion%2C+Michael%22">Marion, Michael</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Louahlia%2C+Hasna%22">Louahlia, Hasna</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> hasna.louahlia@unicaen.fr</i><br /><searchLink fieldCode="AR" term="%22El+Alami%2C+Mustapha%22">El Alami, Mustapha</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gounni%2C+Ayoub%22">Gounni, Ayoub</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lépinasse%2C+Eric%22">Lépinasse, Eric</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Voicu%2C+Ionut%22">Voicu, Ionut</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. Jul2023, Vol. 16 Issue 14, p5526. 23p.
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  Data: <searchLink fieldCode="DE" term="%22Building+material+testing%22">Building material testing</searchLink><br /><searchLink fieldCode="DE" term="%22Temperature+effect%22">Temperature effect</searchLink><br /><searchLink fieldCode="DE" term="%22Hygrothermoelasticity%22">Hygrothermoelasticity</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+flux%22">Heat flux</searchLink><br /><searchLink fieldCode="DE" term="%22Construction+materials%22">Construction materials</searchLink><br /><searchLink fieldCode="DE" term="%22Moisture%22">Moisture</searchLink>
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  Data: This paper highlights the impact of environmental conditions on cob buildings. Different factors such as wall thickness, material permeability and interactions between moisture and heat fluxes can all have significant effects on the performance and durability of cob buildings. An experimental and modeling-based study was conducted on the hygrothermal characterization of cob building materials, which were obtained by mixing earth and fibers. Two types of cob materials that can be used as insulation and to form structural materials in buildings were tested. The effect of outside temperature on adsorption isotherms was investigated for both materials. The experimental data were fitted using the GAB model, after which a new correlation of water content correlation was proposed. Three specific configurations were investigated in which cob material was subjected to moisture transfer and a zero, positive or negative temperature gradient. Based on the resulting measurements, a high coupling effect between heat and moisture transfer inside the structural material was analyzed. A comparison of the experimental and modeling results demonstrated the satisfactory correlation and reliability of the developed model. Simulations were carried out for various wall thicknesses, in order to assess the effect of heat and moisture transfer on water content. The three scenarios were simulated and distributions of water content inside the walls were determined. The results show that the wall thickness of cob buildings and the direction of heat and moisture fluxes affect water content distribution in the structure. A greater thickness of the cob wall leads to higher water content, but this relationship reverses when the heat and moisture fluxes move in the same direction. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Energies (19961073) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – SubjectFull: Construction materials
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      – SubjectFull: Moisture
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      – TitleFull: Effect of Temperature on Moisture Migration in Earth and Fiber Mixtures for Cob Materials.
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              Text: Jul2023
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