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An Experimental Evaluation of Hemp as an Internal Curing Agent in Concrete Materials

The construction industry is facing increased demand for adopting sustainable ‘green’ building materials to minimise the carbon footprint of the infrastructure sector to meet the United Nations 2030 Sustainability Goals. Natural bio-composite materials such as timber and bamboo have been widely used...

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Autores principales: Nazmul, Rahnum T., Sainsbury, Bre-Anne, Al-Deen, Safat, Garcez, Estela O., Ashraf, Mahmud
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10254826/
https://www.ncbi.nlm.nih.gov/pubmed/37297126
http://dx.doi.org/10.3390/ma16113993
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author Nazmul, Rahnum T.
Sainsbury, Bre-Anne
Al-Deen, Safat
Garcez, Estela O.
Ashraf, Mahmud
author_facet Nazmul, Rahnum T.
Sainsbury, Bre-Anne
Al-Deen, Safat
Garcez, Estela O.
Ashraf, Mahmud
author_sort Nazmul, Rahnum T.
collection PubMed
description The construction industry is facing increased demand for adopting sustainable ‘green’ building materials to minimise the carbon footprint of the infrastructure sector to meet the United Nations 2030 Sustainability Goals. Natural bio-composite materials such as timber and bamboo have been widely used in construction for centuries. Hemp has also been used in different forms in the construction sector for decades for its thermal and acoustic insulation capability owing to its moisture buffering capacity and thermal conductivity. The current research aims to explore the possible application of hydrophilic hemp shives for assisting the internal curing of concrete materials as a biodegradable alternative to currently used chemical products. The properties of hemp have been assessed based on their water absorption and desorption properties associated with their characteristic sizes. It was observed that, in addition to its excellent moisture absorption capacity, hemp released most of its absorbed moisture into the surroundings under a high relative humidity (>93%); the best outcome was observed for smaller hemp particles (<2.36 mm). Furthermore, when compared to typical internal curing agents such as lightweight aggregates, hemp showed a similar behaviour in releasing its absorbed moisture to the surroundings indicating its potential application as a natural internal curing agent for concrete materials. An estimate of the volume of hemp shives required to provide a similar curing response to traditional internal curing techniques has been proposed.
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spelling pubmed-102548262023-06-10 An Experimental Evaluation of Hemp as an Internal Curing Agent in Concrete Materials Nazmul, Rahnum T. Sainsbury, Bre-Anne Al-Deen, Safat Garcez, Estela O. Ashraf, Mahmud Materials (Basel) Review The construction industry is facing increased demand for adopting sustainable ‘green’ building materials to minimise the carbon footprint of the infrastructure sector to meet the United Nations 2030 Sustainability Goals. Natural bio-composite materials such as timber and bamboo have been widely used in construction for centuries. Hemp has also been used in different forms in the construction sector for decades for its thermal and acoustic insulation capability owing to its moisture buffering capacity and thermal conductivity. The current research aims to explore the possible application of hydrophilic hemp shives for assisting the internal curing of concrete materials as a biodegradable alternative to currently used chemical products. The properties of hemp have been assessed based on their water absorption and desorption properties associated with their characteristic sizes. It was observed that, in addition to its excellent moisture absorption capacity, hemp released most of its absorbed moisture into the surroundings under a high relative humidity (>93%); the best outcome was observed for smaller hemp particles (<2.36 mm). Furthermore, when compared to typical internal curing agents such as lightweight aggregates, hemp showed a similar behaviour in releasing its absorbed moisture to the surroundings indicating its potential application as a natural internal curing agent for concrete materials. An estimate of the volume of hemp shives required to provide a similar curing response to traditional internal curing techniques has been proposed. MDPI 2023-05-26 /pmc/articles/PMC10254826/ /pubmed/37297126 http://dx.doi.org/10.3390/ma16113993 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Review
Nazmul, Rahnum T.
Sainsbury, Bre-Anne
Al-Deen, Safat
Garcez, Estela O.
Ashraf, Mahmud
An Experimental Evaluation of Hemp as an Internal Curing Agent in Concrete Materials
title An Experimental Evaluation of Hemp as an Internal Curing Agent in Concrete Materials
title_full An Experimental Evaluation of Hemp as an Internal Curing Agent in Concrete Materials
title_fullStr An Experimental Evaluation of Hemp as an Internal Curing Agent in Concrete Materials
title_full_unstemmed An Experimental Evaluation of Hemp as an Internal Curing Agent in Concrete Materials
title_short An Experimental Evaluation of Hemp as an Internal Curing Agent in Concrete Materials
title_sort experimental evaluation of hemp as an internal curing agent in concrete materials
topic Review
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10254826/
https://www.ncbi.nlm.nih.gov/pubmed/37297126
http://dx.doi.org/10.3390/ma16113993
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