Mechanical properties and electrical resistivity of multiwall carbon nanotubes incorporated into high calcium fly ash geopolymer

High calcium fly ash (HCF) is a pozzolan material and is available in large quantity in Thailand due to the existence of coal-based electrical power plants. It is used as a supplemental material to partially replace cement content in concrete as a movement toward concrete sustainability. In order to...

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Autores principales:	Buchit Maho, Piti Sukontasukkul, Gritsada Sua-Iam, Manote Sappakittipakorn, Darrakorn Intarabut, Cherdsak Suksiripattanapong, Prinya Chindaprasirt, Suchart Limkatanyu
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Geopolymer High calcium fly ash Multiwall carbon nanotube Electrical resistivity Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/a847429bc3ed4024915a27b161bf1da4
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spelling	oai:doaj.org-article:a847429bc3ed4024915a27b161bf1da42021-11-20T05:06:25ZMechanical properties and electrical resistivity of multiwall carbon nanotubes incorporated into high calcium fly ash geopolymer2214-509510.1016/j.cscm.2021.e00785https://doaj.org/article/a847429bc3ed4024915a27b161bf1da42021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2214509521003004https://doaj.org/toc/2214-5095High calcium fly ash (HCF) is a pozzolan material and is available in large quantity in Thailand due to the existence of coal-based electrical power plants. It is used as a supplemental material to partially replace cement content in concrete as a movement toward concrete sustainability. In order to lift the sustainability level, a cementitious material without Portland cement called ‘geopolymer’ was introduced. Geopolymer can be produced from raw materials containing high alumina and silica, for example fly ash, blast furnace slag, and metakaolin. For high calcium fly ash geopolymer (HCFG), the unique properties include fast setting, and high early strength. In this study, in order to enhance the properties of HCF geopolymer, multiwall carbon nanotubes (MWCNTs) were introduced into the matrix. In addition to the investigation into basic properties, the effect of MWCNT on electrical resistivity was also investigated to determine its potential use in piezoelectric sensor applications. The results showed that the addition of MWCNTs improved the mechanical properties of HCFG. The maximum compressive and flexural strengths were obtained with a mix containing 0.2% MWCNTs. The EDS test also indicated the increase in geopolymerization and hydration products with the addition of MWCNTs. To investigate the piezoelectricity potential, the electrical resistivity under different levels of compression loads was investigated. The resistivity decreased with the increasing load level up to the first crack, and then decreased. The changes in electrical resistivity indicated the potential use of HCFG incorporated MWCNTs in self-sensing for structural health monitoring.Buchit MahoPiti SukontasukkulGritsada Sua-IamManote SappakittipakornDarrakorn IntarabutCherdsak SuksiripattanapongPrinya ChindaprasirtSuchart LimkatanyuElsevierarticleGeopolymerHigh calcium fly ashMultiwall carbon nanotubeElectrical resistivityMaterials of engineering and construction. Mechanics of materialsTA401-492ENCase Studies in Construction Materials, Vol 15, Iss , Pp e00785- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Geopolymer High calcium fly ash Multiwall carbon nanotube Electrical resistivity Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Geopolymer High calcium fly ash Multiwall carbon nanotube Electrical resistivity Materials of engineering and construction. Mechanics of materials TA401-492 Buchit Maho Piti Sukontasukkul Gritsada Sua-Iam Manote Sappakittipakorn Darrakorn Intarabut Cherdsak Suksiripattanapong Prinya Chindaprasirt Suchart Limkatanyu Mechanical properties and electrical resistivity of multiwall carbon nanotubes incorporated into high calcium fly ash geopolymer
description	High calcium fly ash (HCF) is a pozzolan material and is available in large quantity in Thailand due to the existence of coal-based electrical power plants. It is used as a supplemental material to partially replace cement content in concrete as a movement toward concrete sustainability. In order to lift the sustainability level, a cementitious material without Portland cement called ‘geopolymer’ was introduced. Geopolymer can be produced from raw materials containing high alumina and silica, for example fly ash, blast furnace slag, and metakaolin. For high calcium fly ash geopolymer (HCFG), the unique properties include fast setting, and high early strength. In this study, in order to enhance the properties of HCF geopolymer, multiwall carbon nanotubes (MWCNTs) were introduced into the matrix. In addition to the investigation into basic properties, the effect of MWCNT on electrical resistivity was also investigated to determine its potential use in piezoelectric sensor applications. The results showed that the addition of MWCNTs improved the mechanical properties of HCFG. The maximum compressive and flexural strengths were obtained with a mix containing 0.2% MWCNTs. The EDS test also indicated the increase in geopolymerization and hydration products with the addition of MWCNTs. To investigate the piezoelectricity potential, the electrical resistivity under different levels of compression loads was investigated. The resistivity decreased with the increasing load level up to the first crack, and then decreased. The changes in electrical resistivity indicated the potential use of HCFG incorporated MWCNTs in self-sensing for structural health monitoring.
format	article
author	Buchit Maho Piti Sukontasukkul Gritsada Sua-Iam Manote Sappakittipakorn Darrakorn Intarabut Cherdsak Suksiripattanapong Prinya Chindaprasirt Suchart Limkatanyu
author_facet	Buchit Maho Piti Sukontasukkul Gritsada Sua-Iam Manote Sappakittipakorn Darrakorn Intarabut Cherdsak Suksiripattanapong Prinya Chindaprasirt Suchart Limkatanyu
author_sort	Buchit Maho
title	Mechanical properties and electrical resistivity of multiwall carbon nanotubes incorporated into high calcium fly ash geopolymer
title_short	Mechanical properties and electrical resistivity of multiwall carbon nanotubes incorporated into high calcium fly ash geopolymer
title_full	Mechanical properties and electrical resistivity of multiwall carbon nanotubes incorporated into high calcium fly ash geopolymer
title_fullStr	Mechanical properties and electrical resistivity of multiwall carbon nanotubes incorporated into high calcium fly ash geopolymer
title_full_unstemmed	Mechanical properties and electrical resistivity of multiwall carbon nanotubes incorporated into high calcium fly ash geopolymer
title_sort	mechanical properties and electrical resistivity of multiwall carbon nanotubes incorporated into high calcium fly ash geopolymer
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/a847429bc3ed4024915a27b161bf1da4
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_version_	1718419616452050944

Mechanical properties and electrical resistivity of multiwall carbon nanotubes incorporated into high calcium fly ash geopolymer

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