Total shrinkage and chloride ion penetration in concretes made with white Portland cement and blast furnace slag

The aim of this study was to investigate the influence of the cement replacement content by slag as well the duration of curing on total shrinkage, chloride ion penetration and compressive strength of concretes made with high early-age strength cement and white Portland cement. Water-binder ratios o...

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Auteurs principaux:	Dellinghausen, Luciano Medeiros, Gastaldini, Antônio Luiz Guerra, Isaia, Geraldo Cechella, Veiga, Karina Kozoroski
Format:	Online
Langue:	por
Publié:	ANTAC - Associação Nacional de Tecnologia do Ambiente Construído 2009
Accès en ligne:	https://seer.ufrgs.br/ambienteconstruido/article/view/9448
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id	ojs-article-9448
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spelling	ojs-article-94482010-02-03T16:07:28Z Total shrinkage and chloride ion penetration in concretes made with white Portland cement and blast furnace slag Retração total e penetração de cloretos em concretos com cimento Portland branco e cinza e escória de alto-forno Dellinghausen, Luciano Medeiros Gastaldini, Antônio Luiz Guerra Isaia, Geraldo Cechella Veiga, Karina Kozoroski Retração. Cimento Portland branco. Escória de alto forno. Cura. Cloretos. The aim of this study was to investigate the influence of the cement replacement content by slag as well the duration of curing on total shrinkage, chloride ion penetration and compressive strength of concretes made with high early-age strength cement and white Portland cement. Water-binder ratios of 0.30, 0.42 and 0.55, curing duration of 3 and 7 days, and cement replacement contents of 0%, 50% and 70% were investigated. In order to analyze the influence of the alkali activation on the properties investigated, a concrete made with 50% white Portland cement replacement content by slag and activated by sodium sulfate (4% of binder mass) was used. Before being immersed in the chloride solution, the specimens were subjected to a drying period of 91 days. The results obtained revealed that an increase in the slag content decreased the compressive strength and the drying shrinkage values, as well as the depth of chloride penetration in both cements. Reducing the curing duration resulted in greater drying shrinkage and depth of chloride penetration for both cements, regardless of the slag content. Neste trabalho foram investigadas as influências do teor de escória e do período de cura na retração total, na penetração de íons cloretos e na resistência à compressão axial de concretos com cimento Portland de alta resistência inicial e cimento Portland branco estrutural. Adotaram-se relações água/aglomerante de 0.30, 0.42 e 0.55, teores de escória, em substituição ao cimento Portland, de 0%, 50% e 70%, e períodos de cura de 3 e 7 dias. Foi empregada uma mistura com 50% de escória em substituição ao cimento Portland branco, ativada por sulfato de sódio (4% da massa de aglomerante) para analisar a influência do ativador nas propriedades investigadas. Antes de serem imersos em solução salina os corpos-de-prova foram submetidos a um período de secagem de 91 dias. Dos resultados obtidos, constatou-se que o aumento do teor de escória resultou em decréscimo nos valores de resistência à compressão, de retração e de penetração de cloretos para os dois cimentos investigados. A diminuição no período de cura resultou em maiores valores de retração e de penetração de cloretos, tanto no concreto branco quanto no cinza, independentemente do teor de escória utilizado. ANTAC - Associação Nacional de Tecnologia do Ambiente Construído CAPES, CNPq, FAPERGS 2009-12-09 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://seer.ufrgs.br/ambienteconstruido/article/view/9448 Ambiente Construído; v. 9, n. 4 (2009); 49-65 Ambiente Construído; v. 9, n. 4 (2009); 49-65 Ambiente Construído; v. 9, n. 4 (2009); 49-65 1678-8621 1415-8876 por https://seer.ufrgs.br/ambienteconstruido/article/view/9448/7044 Direitos autorais 2016 Ambiente Construído https://creativecommons.org/licenses/by/4.0
institution	Universidade Federal do Rio Grande do Sul
collection	OJS
language	por
format	Online
author	Dellinghausen, Luciano Medeiros Gastaldini, Antônio Luiz Guerra Isaia, Geraldo Cechella Veiga, Karina Kozoroski
spellingShingle	Dellinghausen, Luciano Medeiros Gastaldini, Antônio Luiz Guerra Isaia, Geraldo Cechella Veiga, Karina Kozoroski Total shrinkage and chloride ion penetration in concretes made with white Portland cement and blast furnace slag
author_facet	Dellinghausen, Luciano Medeiros Gastaldini, Antônio Luiz Guerra Isaia, Geraldo Cechella Veiga, Karina Kozoroski
author_sort	Dellinghausen, Luciano Medeiros
title	Total shrinkage and chloride ion penetration in concretes made with white Portland cement and blast furnace slag
title_short	Total shrinkage and chloride ion penetration in concretes made with white Portland cement and blast furnace slag
title_full	Total shrinkage and chloride ion penetration in concretes made with white Portland cement and blast furnace slag
title_fullStr	Total shrinkage and chloride ion penetration in concretes made with white Portland cement and blast furnace slag
title_full_unstemmed	Total shrinkage and chloride ion penetration in concretes made with white Portland cement and blast furnace slag
title_sort	total shrinkage and chloride ion penetration in concretes made with white portland cement and blast furnace slag
description	The aim of this study was to investigate the influence of the cement replacement content by slag as well the duration of curing on total shrinkage, chloride ion penetration and compressive strength of concretes made with high early-age strength cement and white Portland cement. Water-binder ratios of 0.30, 0.42 and 0.55, curing duration of 3 and 7 days, and cement replacement contents of 0%, 50% and 70% were investigated. In order to analyze the influence of the alkali activation on the properties investigated, a concrete made with 50% white Portland cement replacement content by slag and activated by sodium sulfate (4% of binder mass) was used. Before being immersed in the chloride solution, the specimens were subjected to a drying period of 91 days. The results obtained revealed that an increase in the slag content decreased the compressive strength and the drying shrinkage values, as well as the depth of chloride penetration in both cements. Reducing the curing duration resulted in greater drying shrinkage and depth of chloride penetration for both cements, regardless of the slag content.
publisher	ANTAC - Associação Nacional de Tecnologia do Ambiente Construído
publishDate	2009
url	https://seer.ufrgs.br/ambienteconstruido/article/view/9448
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Total shrinkage and chloride ion penetration in concretes made with white Portland cement and blast furnace slag

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