Influence of quartz powder and silica fume on the performance of Portland cement

Abstract Supplementary cementitious materials interact chemically and physically with cement, influencing the formation of hydrate compounds. Many authors have analyzed the filler and pozzolanic effect. However, few studies have explored the influence of these effects on hydration, properties in the...

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Autores principales:	Ludmila Rodrigues Costa Tavares, Joaquim Francisco Tavares Junior, Leonardo Martins Costa, Augusto Cesar da Silva Bezerra, Paulo Roberto Cetlin, Maria Teresa Paulino Aguilar
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c8f23831fc2c4aa3924eb0a517ef7ea0
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spelling	oai:doaj.org-article:c8f23831fc2c4aa3924eb0a517ef7ea02021-12-02T11:43:51ZInfluence of quartz powder and silica fume on the performance of Portland cement10.1038/s41598-020-78567-w2045-2322https://doaj.org/article/c8f23831fc2c4aa3924eb0a517ef7ea02020-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-78567-whttps://doaj.org/toc/2045-2322Abstract Supplementary cementitious materials interact chemically and physically with cement, influencing the formation of hydrate compounds. Many authors have analyzed the filler and pozzolanic effect. However, few studies have explored the influence of these effects on hydration, properties in the fresh and hardened states, and durability parameters of cementitious composites separately. This study investigates the influence of the replacement of 20% of Portland cement for silica fume (SF) or a 20-µm medium diameter quartz powder (QP) on the properties of cementitious composites from the first hours of hydration to a few months of curing. The results indicate that SF is pozzolanic and that QP has no pozzolanic activity. The use of SF and QP reduces the released energy at early times to the control paste, indicating that these materials reduce the heat of hydration. The microstructure with fewer pores of SF compounds indicates that the pozzolanic reaction reduced pore size and binding capability, resulting in equivalent mechanical properties, reduced permeability and increased electrical resistance of the composites. SF and QP increase the carbonation depth of the composites. SF and QP composites are efficient in the inhibition of the alkali-aggregate reaction. The results indicate that, unlike the filler effect, the occurrence of pozzolanic reaction strongly influences electrical resistance, reducing the risk of corrosion of the reinforcement inserted in the concrete.Ludmila Rodrigues Costa TavaresJoaquim Francisco Tavares JuniorLeonardo Martins CostaAugusto Cesar da Silva BezerraPaulo Roberto CetlinMaria Teresa Paulino AguilarNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-15 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ludmila Rodrigues Costa Tavares Joaquim Francisco Tavares Junior Leonardo Martins Costa Augusto Cesar da Silva Bezerra Paulo Roberto Cetlin Maria Teresa Paulino Aguilar Influence of quartz powder and silica fume on the performance of Portland cement
description	Abstract Supplementary cementitious materials interact chemically and physically with cement, influencing the formation of hydrate compounds. Many authors have analyzed the filler and pozzolanic effect. However, few studies have explored the influence of these effects on hydration, properties in the fresh and hardened states, and durability parameters of cementitious composites separately. This study investigates the influence of the replacement of 20% of Portland cement for silica fume (SF) or a 20-µm medium diameter quartz powder (QP) on the properties of cementitious composites from the first hours of hydration to a few months of curing. The results indicate that SF is pozzolanic and that QP has no pozzolanic activity. The use of SF and QP reduces the released energy at early times to the control paste, indicating that these materials reduce the heat of hydration. The microstructure with fewer pores of SF compounds indicates that the pozzolanic reaction reduced pore size and binding capability, resulting in equivalent mechanical properties, reduced permeability and increased electrical resistance of the composites. SF and QP increase the carbonation depth of the composites. SF and QP composites are efficient in the inhibition of the alkali-aggregate reaction. The results indicate that, unlike the filler effect, the occurrence of pozzolanic reaction strongly influences electrical resistance, reducing the risk of corrosion of the reinforcement inserted in the concrete.
format	article
author	Ludmila Rodrigues Costa Tavares Joaquim Francisco Tavares Junior Leonardo Martins Costa Augusto Cesar da Silva Bezerra Paulo Roberto Cetlin Maria Teresa Paulino Aguilar
author_facet	Ludmila Rodrigues Costa Tavares Joaquim Francisco Tavares Junior Leonardo Martins Costa Augusto Cesar da Silva Bezerra Paulo Roberto Cetlin Maria Teresa Paulino Aguilar
author_sort	Ludmila Rodrigues Costa Tavares
title	Influence of quartz powder and silica fume on the performance of Portland cement
title_short	Influence of quartz powder and silica fume on the performance of Portland cement
title_full	Influence of quartz powder and silica fume on the performance of Portland cement
title_fullStr	Influence of quartz powder and silica fume on the performance of Portland cement
title_full_unstemmed	Influence of quartz powder and silica fume on the performance of Portland cement
title_sort	influence of quartz powder and silica fume on the performance of portland cement
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/c8f23831fc2c4aa3924eb0a517ef7ea0
work_keys_str_mv	AT ludmilarodriguescostatavares influenceofquartzpowderandsilicafumeontheperformanceofportlandcement AT joaquimfranciscotavaresjunior influenceofquartzpowderandsilicafumeontheperformanceofportlandcement AT leonardomartinscosta influenceofquartzpowderandsilicafumeontheperformanceofportlandcement AT augustocesardasilvabezerra influenceofquartzpowderandsilicafumeontheperformanceofportlandcement AT paulorobertocetlin influenceofquartzpowderandsilicafumeontheperformanceofportlandcement AT mariateresapaulinoaguilar influenceofquartzpowderandsilicafumeontheperformanceofportlandcement
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Influence of quartz powder and silica fume on the performance of Portland cement

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