Effect of bottom ash waste on the rheology and durability of alkali activation pastes

On a global scale, thermoelectric energy remains the main source of the energy industry. This process results in a large amount of coal waste. Among them, the bottom ash still has no suitable application in civil construction and usually is discarded in sedimentation basins. The objective of this in...

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Autores principales:	Luís U.D. Tambara Júnior, Madeleing Taborda-Barraza, Malik Cheriaf, Philippe J.P. Gleize, Janaíde C. Rocha
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2022
Materias:	Rheology Bottom ash Metakaolin Alkali activation Durability Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/8d8ea3d59fef416ea482bcd26c17ba40
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id	oai:doaj.org-article:8d8ea3d59fef416ea482bcd26c17ba40
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spelling	oai:doaj.org-article:8d8ea3d59fef416ea482bcd26c17ba402021-11-22T04:25:46ZEffect of bottom ash waste on the rheology and durability of alkali activation pastes2214-509510.1016/j.cscm.2021.e00790https://doaj.org/article/8d8ea3d59fef416ea482bcd26c17ba402022-06-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2214509521003053https://doaj.org/toc/2214-5095On a global scale, thermoelectric energy remains the main source of the energy industry. This process results in a large amount of coal waste. Among them, the bottom ash still has no suitable application in civil construction and usually is discarded in sedimentation basins. The objective of this investigation is to evaluate the valorization of bottom ash in alkali activation pastes. Rheological, mechanical, microstructure, and durability properties were assessed for application to external structures. Bottom ash and metakaolin were used as aluminosilicate and as an alkaline solution a mixture of sodium silicate and NaOH was made. A room temperature cure was adopted for all the samples. The findings show that the alkali activation of bottom ash (BA) was not satisfactory to achieve minimum strength and durability. BA samples require supplementation to improve its mechanical and durability properties. At 28 days of reaction, the formation of superficial cracks was observed, which contributed to the deterioration in the durability tests. However, metakaolin and bottom ash (MKBA) mixtures resulted in the best performance. It was observed an increase of reaction degree and compressive strength (47.9 MPa at 28 days), greater development of thermal conductivity, and reduced deterioration through wetting and drying cycles, marine environments, and sulfate attack.Luís U.D. Tambara JúniorMadeleing Taborda-BarrazaMalik CheriafPhilippe J.P. GleizeJanaíde C. RochaElsevierarticleRheologyBottom ashMetakaolinAlkali activationDurabilityMaterials of engineering and construction. Mechanics of materialsTA401-492ENCase Studies in Construction Materials, Vol 16, Iss , Pp e00790- (2022)
institution	DOAJ
collection	DOAJ
language	EN
topic	Rheology Bottom ash Metakaolin Alkali activation Durability Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Rheology Bottom ash Metakaolin Alkali activation Durability Materials of engineering and construction. Mechanics of materials TA401-492 Luís U.D. Tambara Júnior Madeleing Taborda-Barraza Malik Cheriaf Philippe J.P. Gleize Janaíde C. Rocha Effect of bottom ash waste on the rheology and durability of alkali activation pastes
description	On a global scale, thermoelectric energy remains the main source of the energy industry. This process results in a large amount of coal waste. Among them, the bottom ash still has no suitable application in civil construction and usually is discarded in sedimentation basins. The objective of this investigation is to evaluate the valorization of bottom ash in alkali activation pastes. Rheological, mechanical, microstructure, and durability properties were assessed for application to external structures. Bottom ash and metakaolin were used as aluminosilicate and as an alkaline solution a mixture of sodium silicate and NaOH was made. A room temperature cure was adopted for all the samples. The findings show that the alkali activation of bottom ash (BA) was not satisfactory to achieve minimum strength and durability. BA samples require supplementation to improve its mechanical and durability properties. At 28 days of reaction, the formation of superficial cracks was observed, which contributed to the deterioration in the durability tests. However, metakaolin and bottom ash (MKBA) mixtures resulted in the best performance. It was observed an increase of reaction degree and compressive strength (47.9 MPa at 28 days), greater development of thermal conductivity, and reduced deterioration through wetting and drying cycles, marine environments, and sulfate attack.
format	article
author	Luís U.D. Tambara Júnior Madeleing Taborda-Barraza Malik Cheriaf Philippe J.P. Gleize Janaíde C. Rocha
author_facet	Luís U.D. Tambara Júnior Madeleing Taborda-Barraza Malik Cheriaf Philippe J.P. Gleize Janaíde C. Rocha
author_sort	Luís U.D. Tambara Júnior
title	Effect of bottom ash waste on the rheology and durability of alkali activation pastes
title_short	Effect of bottom ash waste on the rheology and durability of alkali activation pastes
title_full	Effect of bottom ash waste on the rheology and durability of alkali activation pastes
title_fullStr	Effect of bottom ash waste on the rheology and durability of alkali activation pastes
title_full_unstemmed	Effect of bottom ash waste on the rheology and durability of alkali activation pastes
title_sort	effect of bottom ash waste on the rheology and durability of alkali activation pastes
publisher	Elsevier
publishDate	2022
url	https://doaj.org/article/8d8ea3d59fef416ea482bcd26c17ba40
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Effect of bottom ash waste on the rheology and durability of alkali activation pastes

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