Effect of temperature on metakaolin-quartz powder geopolymer binder with different combinations of silicates and hydroxides

Geopolymers have gained great attention from researchers because of their excellent mechanical properties. Recent studies indicated an increasing interest in the use of geopolymer materials in the construction industry due to their great potential to replace Portland cement-based materials or even p...

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Autores principales:	Joadelio Chagas Soares, Jodimar Soares de Azevedo, Dylmar Penteado Dias
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2022
Materias:	Geopolymer binder Residual mechanical strength Temperature effect Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/a7b8d9b8ef484e249268ebe05697024f
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spelling	oai:doaj.org-article:a7b8d9b8ef484e249268ebe05697024f2021-12-02T05:01:38ZEffect of temperature on metakaolin-quartz powder geopolymer binder with different combinations of silicates and hydroxides2214-509510.1016/j.cscm.2021.e00813https://doaj.org/article/a7b8d9b8ef484e249268ebe05697024f2022-06-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2214509521003284https://doaj.org/toc/2214-5095Geopolymers have gained great attention from researchers because of their excellent mechanical properties. Recent studies indicated an increasing interest in the use of geopolymer materials in the construction industry due to their great potential to replace Portland cement-based materials or even produce binders to be used as adhesives in for structural repairs, besides being a promising ecological alternative. In this study, the metakaolin-quartz powder geopolymer binder (MQGB) reached compressive strengths greater than 80 MPa and tensile strengths between 5 and 6 MPa at 28 days. In addition to the tests performed at 28 days, other measurements were conducted at early ages (1, 3 and 14 days) and a high gain in the mechanical strength was observed. The ratio of compressive strength ranged from 55% to 60% on the first day, from 85% to 93% after 3 days and from 90% to 99% after 14 days in relation to the values obtained at 28 days. For samples exposed to high temperatures, the alkaline activator solution was determinant in the residual mechanical performance. The MQGB with potassium silicate presented better results than those prepared with alkaline sodium silicate and the commercial epoxy resin. The MQGB showed mass loss, as a function of temperature, which ranged from 11.15% to 16.41% and the commercial epoxy resin showed a higher value of 31.64%. These results indicate that metakaolin-quartz powder geopolymer binder manufactured with different combinations of silicates and hydroxides, proposed in this study, could be used as fire-resistant material in structural repairs.Joadelio Chagas SoaresJodimar Soares de AzevedoDylmar Penteado DiasElsevierarticleGeopolymer binderResidual mechanical strengthTemperature effectMaterials of engineering and construction. Mechanics of materialsTA401-492ENCase Studies in Construction Materials, Vol 16, Iss , Pp e00813- (2022)
institution	DOAJ
collection	DOAJ
language	EN
topic	Geopolymer binder Residual mechanical strength Temperature effect Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Geopolymer binder Residual mechanical strength Temperature effect Materials of engineering and construction. Mechanics of materials TA401-492 Joadelio Chagas Soares Jodimar Soares de Azevedo Dylmar Penteado Dias Effect of temperature on metakaolin-quartz powder geopolymer binder with different combinations of silicates and hydroxides
description	Geopolymers have gained great attention from researchers because of their excellent mechanical properties. Recent studies indicated an increasing interest in the use of geopolymer materials in the construction industry due to their great potential to replace Portland cement-based materials or even produce binders to be used as adhesives in for structural repairs, besides being a promising ecological alternative. In this study, the metakaolin-quartz powder geopolymer binder (MQGB) reached compressive strengths greater than 80 MPa and tensile strengths between 5 and 6 MPa at 28 days. In addition to the tests performed at 28 days, other measurements were conducted at early ages (1, 3 and 14 days) and a high gain in the mechanical strength was observed. The ratio of compressive strength ranged from 55% to 60% on the first day, from 85% to 93% after 3 days and from 90% to 99% after 14 days in relation to the values obtained at 28 days. For samples exposed to high temperatures, the alkaline activator solution was determinant in the residual mechanical performance. The MQGB with potassium silicate presented better results than those prepared with alkaline sodium silicate and the commercial epoxy resin. The MQGB showed mass loss, as a function of temperature, which ranged from 11.15% to 16.41% and the commercial epoxy resin showed a higher value of 31.64%. These results indicate that metakaolin-quartz powder geopolymer binder manufactured with different combinations of silicates and hydroxides, proposed in this study, could be used as fire-resistant material in structural repairs.
format	article
author	Joadelio Chagas Soares Jodimar Soares de Azevedo Dylmar Penteado Dias
author_facet	Joadelio Chagas Soares Jodimar Soares de Azevedo Dylmar Penteado Dias
author_sort	Joadelio Chagas Soares
title	Effect of temperature on metakaolin-quartz powder geopolymer binder with different combinations of silicates and hydroxides
title_short	Effect of temperature on metakaolin-quartz powder geopolymer binder with different combinations of silicates and hydroxides
title_full	Effect of temperature on metakaolin-quartz powder geopolymer binder with different combinations of silicates and hydroxides
title_fullStr	Effect of temperature on metakaolin-quartz powder geopolymer binder with different combinations of silicates and hydroxides
title_full_unstemmed	Effect of temperature on metakaolin-quartz powder geopolymer binder with different combinations of silicates and hydroxides
title_sort	effect of temperature on metakaolin-quartz powder geopolymer binder with different combinations of silicates and hydroxides
publisher	Elsevier
publishDate	2022
url	https://doaj.org/article/a7b8d9b8ef484e249268ebe05697024f
work_keys_str_mv	AT joadeliochagassoares effectoftemperatureonmetakaolinquartzpowdergeopolymerbinderwithdifferentcombinationsofsilicatesandhydroxides AT jodimarsoaresdeazevedo effectoftemperatureonmetakaolinquartzpowdergeopolymerbinderwithdifferentcombinationsofsilicatesandhydroxides AT dylmarpenteadodias effectoftemperatureonmetakaolinquartzpowdergeopolymerbinderwithdifferentcombinationsofsilicatesandhydroxides
_version_	1718400784632119296

Effect of temperature on metakaolin-quartz powder geopolymer binder with different combinations of silicates and hydroxides

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