Behavior of a hemp-based concrete wall under dynamic thermal and hygric solicitations
| Autor: | Billy Seng, Sandra Gallego, Camille Magniont, Sylvie Lorente |
|---|---|
| Přispěvatelé: | Laboratoire Matériaux et Durabilité des constructions (LMDC), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Work (thermodynamics)
Materials science Moisture business.industry 020209 energy Mechanical Engineering 0211 other engineering and technologies 02 engineering and technology Building and Construction Hemp concrete [SPI]Engineering Sciences [physics] [SPI.GCIV]Engineering Sciences [physics]/Civil Engineering Thermal insulation Precast concrete 021105 building & construction Thermal 0202 electrical engineering electronic engineering information engineering Temperature difference Electrical and Electronic Engineering Composite material Transport phenomena business ComputingMilieux_MISCELLANEOUS Civil and Structural Engineering |
| Zdroj: | Energy and Buildings Energy and Buildings, Elsevier, 2021, 232, pp.110669. ⟨10.1016/j.enbuild.2020.110669⟩ Energy and Buildings, 2021, 232, pp.110669. ⟨10.1016/j.enbuild.2020.110669⟩ |
| ISSN: | 0378-7788 |
| DOI: | 10.1016/j.enbuild.2020.110669⟩ |
| Popis: | Here we document the behavior at wall scale of a hemp-based hygroscopic material under various temperature and moisture dynamic conditions. The wall was made of precast hemp concrete (HC) blocks with air cavities. It was tested within a bi-climatic chamber and monitored thanks to hygrothermal sensors in the wall and in the chambers. The results from an in-house heat and moisture transfer model were compared to the experimental data, using the actual thermal and hygric characteristics of the hemp-based material determined in a previous study. The experiments allowed to demonstrate how the heat and moisture transport phenomena within the wall are coupled, particularly how a temperature difference can be a sufficient driving force for the release of moisture. The work points out the impact of moisture adsorption on heat release and on the temperature changes within the wall. Finally the numerical model served also to the modelling of an equivalent wall made of concrete to help highlighting the moisture dumping capability of the bio-based material, together with its thermal insulation capacity. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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