Monitoring of drying kinetics evolution and hygrothermal properties of new earth-based materials using climatic chamber simulation
This study focuses on the drying kinetics of cob and light-earth layers comprising a hybrid walling system. Volumetric water content sensors are immersed and placed at different positions on the walls of a building to measure the drying kinetics. In addition, an experimental analysis of the effect o...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-07-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509522009305 |
| _version_ | 1797799010383167488 |
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| author | Athmane Azil Karim Touati Nassim Sebaibi Malo Le Guern François Streiff Steve Goodhew Moussa Gomina Mohamed Boutouil |
| author_facet | Athmane Azil Karim Touati Nassim Sebaibi Malo Le Guern François Streiff Steve Goodhew Moussa Gomina Mohamed Boutouil |
| author_sort | Athmane Azil |
| collection | DOAJ |
| description | This study focuses on the drying kinetics of cob and light-earth layers comprising a hybrid walling system. Volumetric water content sensors are immersed and placed at different positions on the walls of a building to measure the drying kinetics. In addition, an experimental analysis of the effect of temperature, relative humidity (RH), and wind velocity variations on thermal conductivity in a climatic chamber under winter and summer conditions was conducted. The analysis of samples in laboratory aims to investigate the hygrothermal properties of cob and light-earth materials, and their dependency on the aforementioned parameters. The in situ drying kinetics of both materials involves water content reduction and stabilization; however, in the laboratory, although the water content of materials decreases, the drying is incomplete. Which may be due to the limited wind speed. The hydrothermal properties show that open porosity affects water vapor permeability and modifies the RH of cob and light-earth. At 23 °C, when the relative humidity (RH) range was 10–30%, the absorbed water vapor of cob and light earth was 0–2%. However, when the RH is 40–90%, the absorbed water vapor of light earth (2–9%) exceeds that of cob (0.5–2%). Moreover, the response to relative humidity (RH) with regard to the mixing law of components and samples differs. The resistance factor to water vapor diffusion values for cob and light-earth are 12.9 and 8.2, respectively. In this study, the thermal conductivity measurements under summer and winter conditions provide the relationship between the thermal conductivity, density, and water content of cob and light-earth materials. |
| first_indexed | 2024-03-13T04:12:29Z |
| format | Article |
| id | doaj.art-67f36d950b964856b2947b664b4e6984 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-03-13T04:12:29Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-67f36d950b964856b2947b664b4e69842023-06-21T06:53:16ZengElsevierCase Studies in Construction Materials2214-50952023-07-0118e01798Monitoring of drying kinetics evolution and hygrothermal properties of new earth-based materials using climatic chamber simulationAthmane Azil0Karim Touati1Nassim Sebaibi2Malo Le Guern3François Streiff4Steve Goodhew5Moussa Gomina6Mohamed Boutouil7ComUE Normandie Université, Builders Ecole d’Ingénieurs, Builders Lab 1, Rue Pierre et Marie Curie, 14610 Epron, France; Corresponding author.ComUE Normandie Université, Builders Ecole d’Ingénieurs, Builders Lab 1, Rue Pierre et Marie Curie, 14610 Epron, FranceComUE Normandie Université, Builders Ecole d’Ingénieurs, Builders Lab 1, Rue Pierre et Marie Curie, 14610 Epron, FranceComUE Normandie Université, Builders Ecole d’Ingénieurs, Builders Lab 1, Rue Pierre et Marie Curie, 14610 Epron, FranceParc Naturel Régional des Marais du Cotentin et du Bessin (PnrMCB), FranceUniversity of Plymouth, United KingdomLaboratoire CRISMAT, UMR 6508 CNRS, ENSICAEN, 6 bd Maréchal Juin, CEDEX 4, Caen 14050, FranceComUE Normandie Université, Builders Ecole d’Ingénieurs, Builders Lab 1, Rue Pierre et Marie Curie, 14610 Epron, FranceThis study focuses on the drying kinetics of cob and light-earth layers comprising a hybrid walling system. Volumetric water content sensors are immersed and placed at different positions on the walls of a building to measure the drying kinetics. In addition, an experimental analysis of the effect of temperature, relative humidity (RH), and wind velocity variations on thermal conductivity in a climatic chamber under winter and summer conditions was conducted. The analysis of samples in laboratory aims to investigate the hygrothermal properties of cob and light-earth materials, and their dependency on the aforementioned parameters. The in situ drying kinetics of both materials involves water content reduction and stabilization; however, in the laboratory, although the water content of materials decreases, the drying is incomplete. Which may be due to the limited wind speed. The hydrothermal properties show that open porosity affects water vapor permeability and modifies the RH of cob and light-earth. At 23 °C, when the relative humidity (RH) range was 10–30%, the absorbed water vapor of cob and light earth was 0–2%. However, when the RH is 40–90%, the absorbed water vapor of light earth (2–9%) exceeds that of cob (0.5–2%). Moreover, the response to relative humidity (RH) with regard to the mixing law of components and samples differs. The resistance factor to water vapor diffusion values for cob and light-earth are 12.9 and 8.2, respectively. In this study, the thermal conductivity measurements under summer and winter conditions provide the relationship between the thermal conductivity, density, and water content of cob and light-earth materials.http://www.sciencedirect.com/science/article/pii/S2214509522009305Drying kineticsHygrothermal propertiesCobLight-earthWater contentThermal conductivity |
| spellingShingle | Athmane Azil Karim Touati Nassim Sebaibi Malo Le Guern François Streiff Steve Goodhew Moussa Gomina Mohamed Boutouil Monitoring of drying kinetics evolution and hygrothermal properties of new earth-based materials using climatic chamber simulation Case Studies in Construction Materials Drying kinetics Hygrothermal properties Cob Light-earth Water content Thermal conductivity |
| title | Monitoring of drying kinetics evolution and hygrothermal properties of new earth-based materials using climatic chamber simulation |
| title_full | Monitoring of drying kinetics evolution and hygrothermal properties of new earth-based materials using climatic chamber simulation |
| title_fullStr | Monitoring of drying kinetics evolution and hygrothermal properties of new earth-based materials using climatic chamber simulation |
| title_full_unstemmed | Monitoring of drying kinetics evolution and hygrothermal properties of new earth-based materials using climatic chamber simulation |
| title_short | Monitoring of drying kinetics evolution and hygrothermal properties of new earth-based materials using climatic chamber simulation |
| title_sort | monitoring of drying kinetics evolution and hygrothermal properties of new earth based materials using climatic chamber simulation |
| topic | Drying kinetics Hygrothermal properties Cob Light-earth Water content Thermal conductivity |
| url | http://www.sciencedirect.com/science/article/pii/S2214509522009305 |
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