Accelerated Aging Effects on the Hygrothermal Behaviour of Hemp Concrete: Experimental and Numerical Investigations

In this article, both numerical and experimental investigations were carried out on the durability of hemp concrete. For this, an accelerated aging process was performed using cycles of immersion, freezing and drying. Then, an experimental campaign was enabled to determine heat and mass transfer pro...

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Autores principales:	Ferhat Benmahiddine, Rafik Belarbi, Julien Berger, Fares Bennai, Abdelkader Tahakourt
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	hemp concrete hygrothermal properties accelerated aging microstructure bio-based materials Technology T
Acceso en línea:	https://doaj.org/article/df777c05b8f041d1bade69b74d04d10e
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spelling	oai:doaj.org-article:df777c05b8f041d1bade69b74d04d10e2021-11-11T15:49:17ZAccelerated Aging Effects on the Hygrothermal Behaviour of Hemp Concrete: Experimental and Numerical Investigations10.3390/en142170051996-1073https://doaj.org/article/df777c05b8f041d1bade69b74d04d10e2021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/7005https://doaj.org/toc/1996-1073In this article, both numerical and experimental investigations were carried out on the durability of hemp concrete. For this, an accelerated aging process was performed using cycles of immersion, freezing and drying. Then, an experimental campaign was enabled to determine heat and mass transfer properties, as well as the microstructure for both aged and reference materials. Observations using a digital microscope showed the appearance of cracks at the interfaces and an increase of the porosity of about 6%. These microstructural modifications imply a non-negligible evolution of heat and mass transfer properties. Thus, a numerical model for the prediction of heat and mass transfer was developed. The prediction of physical phenomena was computed using both aged and reference material properties. It highlights the aging effects on the behaviour of the hemp concrete. The numerical simulation results showed significant discrepancies between the predicted relative humidity values for the two configurations (aged and reference) of about 18% and a maximum phase shift of 40 min, due to the amplification of the mass transfer kinetics after aging. Nevertheless, few deviations in temperature values were found. Thus, after aging, sensible heat fluxes were overestimated compared to the reference case, unlike latent heat fluxes, where an underestimation was shown.Ferhat BenmahiddineRafik BelarbiJulien BergerFares BennaiAbdelkader TahakourtMDPI AGarticlehemp concretehygrothermal propertiesaccelerated agingmicrostructurebio-based materialsTechnologyTENEnergies, Vol 14, Iss 7005, p 7005 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	hemp concrete hygrothermal properties accelerated aging microstructure bio-based materials Technology T
spellingShingle	hemp concrete hygrothermal properties accelerated aging microstructure bio-based materials Technology T Ferhat Benmahiddine Rafik Belarbi Julien Berger Fares Bennai Abdelkader Tahakourt Accelerated Aging Effects on the Hygrothermal Behaviour of Hemp Concrete: Experimental and Numerical Investigations
description	In this article, both numerical and experimental investigations were carried out on the durability of hemp concrete. For this, an accelerated aging process was performed using cycles of immersion, freezing and drying. Then, an experimental campaign was enabled to determine heat and mass transfer properties, as well as the microstructure for both aged and reference materials. Observations using a digital microscope showed the appearance of cracks at the interfaces and an increase of the porosity of about 6%. These microstructural modifications imply a non-negligible evolution of heat and mass transfer properties. Thus, a numerical model for the prediction of heat and mass transfer was developed. The prediction of physical phenomena was computed using both aged and reference material properties. It highlights the aging effects on the behaviour of the hemp concrete. The numerical simulation results showed significant discrepancies between the predicted relative humidity values for the two configurations (aged and reference) of about 18% and a maximum phase shift of 40 min, due to the amplification of the mass transfer kinetics after aging. Nevertheless, few deviations in temperature values were found. Thus, after aging, sensible heat fluxes were overestimated compared to the reference case, unlike latent heat fluxes, where an underestimation was shown.
format	article
author	Ferhat Benmahiddine Rafik Belarbi Julien Berger Fares Bennai Abdelkader Tahakourt
author_facet	Ferhat Benmahiddine Rafik Belarbi Julien Berger Fares Bennai Abdelkader Tahakourt
author_sort	Ferhat Benmahiddine
title	Accelerated Aging Effects on the Hygrothermal Behaviour of Hemp Concrete: Experimental and Numerical Investigations
title_short	Accelerated Aging Effects on the Hygrothermal Behaviour of Hemp Concrete: Experimental and Numerical Investigations
title_full	Accelerated Aging Effects on the Hygrothermal Behaviour of Hemp Concrete: Experimental and Numerical Investigations
title_fullStr	Accelerated Aging Effects on the Hygrothermal Behaviour of Hemp Concrete: Experimental and Numerical Investigations
title_full_unstemmed	Accelerated Aging Effects on the Hygrothermal Behaviour of Hemp Concrete: Experimental and Numerical Investigations
title_sort	accelerated aging effects on the hygrothermal behaviour of hemp concrete: experimental and numerical investigations
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/df777c05b8f041d1bade69b74d04d10e
work_keys_str_mv	AT ferhatbenmahiddine acceleratedagingeffectsonthehygrothermalbehaviourofhempconcreteexperimentalandnumericalinvestigations AT rafikbelarbi acceleratedagingeffectsonthehygrothermalbehaviourofhempconcreteexperimentalandnumericalinvestigations AT julienberger acceleratedagingeffectsonthehygrothermalbehaviourofhempconcreteexperimentalandnumericalinvestigations AT faresbennai acceleratedagingeffectsonthehygrothermalbehaviourofhempconcreteexperimentalandnumericalinvestigations AT abdelkadertahakourt acceleratedagingeffectsonthehygrothermalbehaviourofhempconcreteexperimentalandnumericalinvestigations
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Accelerated Aging Effects on the Hygrothermal Behaviour of Hemp Concrete: Experimental and Numerical Investigations

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