Mechanical, Fracture, and Microstructural Assessment of Carbon-Fiber-Reinforced Geopolymer Composites Containing Na<sub>2</sub>O

For a sustainable environment, geopolymer (GPO) paste can be used in the construction industry instead of Portland cement. Nowadays, sustainable construction and high-efficacy composites are demanding. Therefore, in the present investigation, the mechanical and microstructural efficacy of carbon-fib...

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Autores principales:	Ahmad Rashedi, Riadh Marzouki, Ali Raza, Nurul Fazita Mohammad Rawi, J. Naveen
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	carbon fibers geopolymer nano-sodium dioxide compressive strength hardness scanning electron microscopy Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/eab0bd2d9a1e468fa658291dc12c3aa4
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spelling	oai:doaj.org-article:eab0bd2d9a1e468fa658291dc12c3aa42021-11-11T18:49:19ZMechanical, Fracture, and Microstructural Assessment of Carbon-Fiber-Reinforced Geopolymer Composites Containing Na<sub>2</sub>O10.3390/polym132138522073-4360https://doaj.org/article/eab0bd2d9a1e468fa658291dc12c3aa42021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4360/13/21/3852https://doaj.org/toc/2073-4360For a sustainable environment, geopolymer (GPO) paste can be used in the construction industry instead of Portland cement. Nowadays, sustainable construction and high-efficacy composites are demanding. Therefore, in the present investigation, the mechanical and microstructural efficacy of carbon-fiber-reinforced fly ash-based GPO with different percentages of nano-sodium dioxide (NS) were studied. The investigated percentages of NS were 0%, 1%, 2%, 3%, and 4%. For all the samples, the carbon fiber content was kept the same at 0.5% by weight. Different percentages of NS for all five fabricated GPO composite pastes were assessed with scanning electron microscopy (SEM). Various mechanical parameters of GPO—the compressive strength, toughness modulus, hardness, toughness indices, impact strength, fracture toughness, flexural strength, and elastic modulus—were evaluated. The results revealed that the use of 3% NS was the most effective for ameliorating the mechanical, microstructural, and fracture behavior of GPO. The use of 3% NS in carbon-fiber-reinforced GPO paste showed the maximum improvements of 22%, 46%, 30%, 40%, 14%, 38.4%, 50.2%, 31%, and 64% for the compressive strength, flexural strength, elastic modulus, toughness modulus, hardness, compressive stiffness, bending stiffness, fracture toughness, and impact strength, respectively. The SEM study showed that the inclusion of NS improved the microstructure and delivered a denser GPO paste by improving the interfacial zones and quickening the polymerization reaction.Ahmad RashediRiadh MarzoukiAli RazaNurul Fazita Mohammad RawiJ. NaveenMDPI AGarticlecarbon fibersgeopolymernano-sodium dioxidecompressive strengthhardnessscanning electron microscopyOrganic chemistryQD241-441ENPolymers, Vol 13, Iss 3852, p 3852 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	carbon fibers geopolymer nano-sodium dioxide compressive strength hardness scanning electron microscopy Organic chemistry QD241-441
spellingShingle	carbon fibers geopolymer nano-sodium dioxide compressive strength hardness scanning electron microscopy Organic chemistry QD241-441 Ahmad Rashedi Riadh Marzouki Ali Raza Nurul Fazita Mohammad Rawi J. Naveen Mechanical, Fracture, and Microstructural Assessment of Carbon-Fiber-Reinforced Geopolymer Composites Containing Na<sub>2</sub>O
description	For a sustainable environment, geopolymer (GPO) paste can be used in the construction industry instead of Portland cement. Nowadays, sustainable construction and high-efficacy composites are demanding. Therefore, in the present investigation, the mechanical and microstructural efficacy of carbon-fiber-reinforced fly ash-based GPO with different percentages of nano-sodium dioxide (NS) were studied. The investigated percentages of NS were 0%, 1%, 2%, 3%, and 4%. For all the samples, the carbon fiber content was kept the same at 0.5% by weight. Different percentages of NS for all five fabricated GPO composite pastes were assessed with scanning electron microscopy (SEM). Various mechanical parameters of GPO—the compressive strength, toughness modulus, hardness, toughness indices, impact strength, fracture toughness, flexural strength, and elastic modulus—were evaluated. The results revealed that the use of 3% NS was the most effective for ameliorating the mechanical, microstructural, and fracture behavior of GPO. The use of 3% NS in carbon-fiber-reinforced GPO paste showed the maximum improvements of 22%, 46%, 30%, 40%, 14%, 38.4%, 50.2%, 31%, and 64% for the compressive strength, flexural strength, elastic modulus, toughness modulus, hardness, compressive stiffness, bending stiffness, fracture toughness, and impact strength, respectively. The SEM study showed that the inclusion of NS improved the microstructure and delivered a denser GPO paste by improving the interfacial zones and quickening the polymerization reaction.
format	article
author	Ahmad Rashedi Riadh Marzouki Ali Raza Nurul Fazita Mohammad Rawi J. Naveen
author_facet	Ahmad Rashedi Riadh Marzouki Ali Raza Nurul Fazita Mohammad Rawi J. Naveen
author_sort	Ahmad Rashedi
title	Mechanical, Fracture, and Microstructural Assessment of Carbon-Fiber-Reinforced Geopolymer Composites Containing Na<sub>2</sub>O
title_short	Mechanical, Fracture, and Microstructural Assessment of Carbon-Fiber-Reinforced Geopolymer Composites Containing Na<sub>2</sub>O
title_full	Mechanical, Fracture, and Microstructural Assessment of Carbon-Fiber-Reinforced Geopolymer Composites Containing Na<sub>2</sub>O
title_fullStr	Mechanical, Fracture, and Microstructural Assessment of Carbon-Fiber-Reinforced Geopolymer Composites Containing Na<sub>2</sub>O
title_full_unstemmed	Mechanical, Fracture, and Microstructural Assessment of Carbon-Fiber-Reinforced Geopolymer Composites Containing Na<sub>2</sub>O
title_sort	mechanical, fracture, and microstructural assessment of carbon-fiber-reinforced geopolymer composites containing na<sub>2</sub>o
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/eab0bd2d9a1e468fa658291dc12c3aa4
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Mechanical, Fracture, and Microstructural Assessment of Carbon-Fiber-Reinforced Geopolymer Composites Containing Na<sub>2</sub>O

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