Geopolymers Reinforced with Natural Fibers: A Comparison among Different Sources

The performance of different natural fibers (hemp, kenaf and bamboo) used to formulate composites with an alkali-activated matrix based on metakaolin is evaluated. Short fibers were randomly dispersed up to about 3% of the binder weight, and the fresh and cured properties of the derived composites w...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Andrea Saccani, Luisa Molari, Grazia Totaro, Stefania Manzi
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	geopolymer natural fibers mechanical properties pseudoplastic behavior Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/5550e207f46b4c75a1b66a8165111630
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:5550e207f46b4c75a1b66a8165111630
record_format	dspace
spelling	oai:doaj.org-article:5550e207f46b4c75a1b66a81651116302021-11-25T16:43:04ZGeopolymers Reinforced with Natural Fibers: A Comparison among Different Sources10.3390/app1122110262076-3417https://doaj.org/article/5550e207f46b4c75a1b66a81651116302021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/22/11026https://doaj.org/toc/2076-3417The performance of different natural fibers (hemp, kenaf and bamboo) used to formulate composites with an alkali-activated matrix based on metakaolin is evaluated. Short fibers were randomly dispersed up to about 3% of the binder weight, and the fresh and cured properties of the derived composites were determined. Up to the investigated fraction, it is still possible to obtain adequate workability without the supply of additional water or additives. Upon modification with fibers, the mechanical behavior changes from completely brittle to pseudoplastic with increased toughness. The flexural strength increases by up to 80% at the highest bamboo amount and up to 20% for kenaf. Hemp fibers have a negligible effect on flexural strength but strongly improve the materials’ toughness. Moreover, the addition of fibers does not change the manner in which the material interacts with moisture. Indeed, the water uptake of the modified samples was comparable to that of the unmodified samples, and the composites showed a decreased rate of water diffusion as the amount of fiber increased.Andrea SaccaniLuisa MolariGrazia TotaroStefania ManziMDPI AGarticlegeopolymernatural fibersmechanical propertiespseudoplastic behaviorTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 11026, p 11026 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	geopolymer natural fibers mechanical properties pseudoplastic behavior Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	geopolymer natural fibers mechanical properties pseudoplastic behavior Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Andrea Saccani Luisa Molari Grazia Totaro Stefania Manzi Geopolymers Reinforced with Natural Fibers: A Comparison among Different Sources
description	The performance of different natural fibers (hemp, kenaf and bamboo) used to formulate composites with an alkali-activated matrix based on metakaolin is evaluated. Short fibers were randomly dispersed up to about 3% of the binder weight, and the fresh and cured properties of the derived composites were determined. Up to the investigated fraction, it is still possible to obtain adequate workability without the supply of additional water or additives. Upon modification with fibers, the mechanical behavior changes from completely brittle to pseudoplastic with increased toughness. The flexural strength increases by up to 80% at the highest bamboo amount and up to 20% for kenaf. Hemp fibers have a negligible effect on flexural strength but strongly improve the materials’ toughness. Moreover, the addition of fibers does not change the manner in which the material interacts with moisture. Indeed, the water uptake of the modified samples was comparable to that of the unmodified samples, and the composites showed a decreased rate of water diffusion as the amount of fiber increased.
format	article
author	Andrea Saccani Luisa Molari Grazia Totaro Stefania Manzi
author_facet	Andrea Saccani Luisa Molari Grazia Totaro Stefania Manzi
author_sort	Andrea Saccani
title	Geopolymers Reinforced with Natural Fibers: A Comparison among Different Sources
title_short	Geopolymers Reinforced with Natural Fibers: A Comparison among Different Sources
title_full	Geopolymers Reinforced with Natural Fibers: A Comparison among Different Sources
title_fullStr	Geopolymers Reinforced with Natural Fibers: A Comparison among Different Sources
title_full_unstemmed	Geopolymers Reinforced with Natural Fibers: A Comparison among Different Sources
title_sort	geopolymers reinforced with natural fibers: a comparison among different sources
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/5550e207f46b4c75a1b66a8165111630
work_keys_str_mv	AT andreasaccani geopolymersreinforcedwithnaturalfibersacomparisonamongdifferentsources AT luisamolari geopolymersreinforcedwithnaturalfibersacomparisonamongdifferentsources AT graziatotaro geopolymersreinforcedwithnaturalfibersacomparisonamongdifferentsources AT stefaniamanzi geopolymersreinforcedwithnaturalfibersacomparisonamongdifferentsources
_version_	1718413017568247808

Geopolymers Reinforced with Natural Fibers: A Comparison among Different Sources

Ejemplares similares