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Volume 12
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Article

Experimental Characterization of Raw Earth Properties for Modeling Their Hygrothermal Behavior

by
Yassine Elias Belarbi
1,
Mohamed Sawadogo
2,
Philippe Poullain
1,
Nabil Issaadi
1,
Ameur El Amine Hamami
2,
Stéphanie Bonnet
1 and
Rafik Belarbi
2,3,*
1
GeM UMR CNRS 6183, Université de Nantes, 52 Rue Michel Ange, CEDEX, F-44606 Saint-Nazaire, France
2
LaSIE UMR 7356 CNRS, La Rochelle Université, Avenue Michel Crépeau, CEDEX 01, F-17042 La Rochelle, France
3
Department of Civil and Building Engineering, Université de Sherbrooke, 2500 Bd de l’Université, Sherbrooke, QC J1K 2R1, Canada
*
Author to whom correspondence should be addressed.
Buildings 2022, 12(5), 648; https://doi.org/10.3390/buildings12050648
Submission received: 31 March 2022 / Revised: 5 May 2022 / Accepted: 9 May 2022 / Published: 12 May 2022
(This article belongs to the Topic Sustainable Building Structures)
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Abstract

Raw earth is one of the oldest building materials of mankind. Almost a third of the world’s population is living in an earth-based house. However, their use remains low compared to conventional materials such as concrete, steel, and wood. Although these geosourced materials are abundant, recyclable, and have a low environmental footprint, their use is very limited in the construction sector. This can be explained by the lack of data regarding their hygrothermal behavior. In this context, the present work aims to highlight the properties of cob construction material with straw addition. An experimental characterization of hygrothermal and microstructural properties has been carried out. Thermal conductivity, specific heat, sorption isotherms, moisture storage capacity, moisture buffer value (MBV), and water vapor permeability are obtained experimentally. Then, the collected data are used as input parameters of a numerical prediction model to numerically assess the thermal and hygric behavior. Cob is then compared to other more commonly used materials to highlight the benefits of its use within the context of the energetic and environmental transition. Our results will allow better understanding of the behavior of the new geosourced material thanks to experimental and numerical investigation.
Keywords: raw earth; hygrothermal characterization; microstructure; moisture buffer capacity raw earth; hygrothermal characterization; microstructure; moisture buffer capacity

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MDPI and ACS Style

Belarbi, Y.E.; Sawadogo, M.; Poullain, P.; Issaadi, N.; Hamami, A.E.A.; Bonnet, S.; Belarbi, R. Experimental Characterization of Raw Earth Properties for Modeling Their Hygrothermal Behavior. Buildings 2022, 12, 648. https://doi.org/10.3390/buildings12050648

AMA Style

Belarbi YE, Sawadogo M, Poullain P, Issaadi N, Hamami AEA, Bonnet S, Belarbi R. Experimental Characterization of Raw Earth Properties for Modeling Their Hygrothermal Behavior. Buildings. 2022; 12(5):648. https://doi.org/10.3390/buildings12050648

Chicago/Turabian Style

Belarbi, Yassine Elias, Mohamed Sawadogo, Philippe Poullain, Nabil Issaadi, Ameur El Amine Hamami, Stéphanie Bonnet, and Rafik Belarbi. 2022. "Experimental Characterization of Raw Earth Properties for Modeling Their Hygrothermal Behavior" Buildings 12, no. 5: 648. https://doi.org/10.3390/buildings12050648

APA Style

Belarbi, Y. E., Sawadogo, M., Poullain, P., Issaadi, N., Hamami, A. E. A., Bonnet, S., & Belarbi, R. (2022). Experimental Characterization of Raw Earth Properties for Modeling Their Hygrothermal Behavior. Buildings, 12(5), 648. https://doi.org/10.3390/buildings12050648

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