Analysis of the stresses in the interface between dry-set mortar and ceramic tiles under thermic efforts

Building façades may be affected by different kinds of pathologies. Coating displacement usually happens either between interface ceramic tiles and dry-set mortar or between this mortar and the rendering. This work presents the results of a study based on the Finite Element Method, in which, startin...

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Autori principali:	Saraiva, Ana Gabriela, Bauer, Elton, Bezerra, Luciano Mendes
Natura:	Online
Lingua:	por
Pubblicazione:	ANTAC - Associação Nacional de Tecnologia do Ambiente Construído 2008
Accesso online:	https://seer.ufrgs.br/ambienteconstruido/article/view/3417
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spelling	ojs-article-34172008-04-14T17:27:37Z Analysis of the stresses in the interface between dry-set mortar and ceramic tiles under thermic efforts Análise das tensões entre argamassa colante e placas cerâmicas submetidas a esforços de natureza térmica Saraiva, Ana Gabriela Bauer, Elton Bezerra, Luciano Mendes Sistemas de revestimento cerâmico; Tensões em fachadas Building façades may be affected by different kinds of pathologies. Coating displacement usually happens either between interface ceramic tiles and dry-set mortar or between this mortar and the rendering. This work presents the results of a study based on the Finite Element Method, in which, starting from the numerical model defined for analysis, the stresses in the interface between dry-set mortar and ceramic tiles under thermic efforts were examined. These efforts were analysed with dry-set mortar in three different situations: by changing the thickness of the rendering, the thermal absorption coefficient of tiles and the ceramic tile grout used in the façade model studied. It is possible to observe that when the thickness of the rendering increases, there is a slight reduction of normal stresses throughout the Y axis. Moreover, stresses increase approximately 60% when ceramic tiles with higher absorption coefficient are used. The use of ceramic tile grout with lower elasticity modulus produces higher normal stresses throughout Y axis in joint areas and lower stresses in the centre of the ceramic tiles, which are submitted to a flexural effort. This result reinforces the importance of the test for determining the flexural resistance modulus, as described by Brazilian standards. As fachadas das edificações estão sujeitas a diversos tipos de patologias, ocorrendo comumente o descolamento do revestimento, que pode acontecer na interface entre placas cerâmicas e argamassa colante ou entre esta e a argamassa de emboço. Este trabalho apresenta os resultados de um estudo através do Método dos Elementos Finitos, onde a partir do modelo numérico definido para a análise, verificaram-se as tensões existentes na interface entre a argamassa colante e as placas cerâmicas quando submetidas a esforços de natureza térmica. Foram analisados os esforços ao se variar a argamassa colante, segundo três situações distintas: variando-se a espessura da camada de emboço, o coeficiente de absorção térmica das placas cerâmicas e o tipo de rejunte utilizado na fachada modelo que foi estudada. A partir do modelo estudado, observou-se que: ao se aumentar a espessura da camada de emboço, há uma ligeira diminuição nas tensões normais ao longo do eixo Y (eixo normal ao plano do sistema de revestimento em estudo); há um aumento de tensões em torno de 60% devido a utilização de placas cerâmicas com um maior coeficiente de absorção térmica; a utilização do rejunte com menor módulo de elasticidade produz um aumento de tensões normais ao longo do eixo Y na região das juntas e diminuição de tensões no centro das placas cerâmicas submetendo, desta forma, as placas cerâmicas à um esforço de flexão, alertando-se para a importância do ensaio para a determinação do módulo de resistência à flexão descrito nas normas brasileiras. ANTAC - Associação Nacional de Tecnologia do Ambiente Construído 2008-04-14 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://seer.ufrgs.br/ambienteconstruido/article/view/3417 Ambiente Construído; v. 2, n. 2 (2002): Edição Especial Tecnologia das Argamassas; 47-56 Ambiente Construído; v. 2, n. 2 (2002): Edição Especial Tecnologia das Argamassas; 47-56 Ambiente Construído; v. 2, n. 2 (2002): Edição Especial Tecnologia das Argamassas; 47-56 1678-8621 1415-8876 por https://seer.ufrgs.br/ambienteconstruido/article/view/3417/1832 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	Saraiva, Ana Gabriela Bauer, Elton Bezerra, Luciano Mendes
spellingShingle	Saraiva, Ana Gabriela Bauer, Elton Bezerra, Luciano Mendes Analysis of the stresses in the interface between dry-set mortar and ceramic tiles under thermic efforts
author_facet	Saraiva, Ana Gabriela Bauer, Elton Bezerra, Luciano Mendes
author_sort	Saraiva, Ana Gabriela
title	Analysis of the stresses in the interface between dry-set mortar and ceramic tiles under thermic efforts
title_short	Analysis of the stresses in the interface between dry-set mortar and ceramic tiles under thermic efforts
title_full	Analysis of the stresses in the interface between dry-set mortar and ceramic tiles under thermic efforts
title_fullStr	Analysis of the stresses in the interface between dry-set mortar and ceramic tiles under thermic efforts
title_full_unstemmed	Analysis of the stresses in the interface between dry-set mortar and ceramic tiles under thermic efforts
title_sort	analysis of the stresses in the interface between dry-set mortar and ceramic tiles under thermic efforts
description	Building façades may be affected by different kinds of pathologies. Coating displacement usually happens either between interface ceramic tiles and dry-set mortar or between this mortar and the rendering. This work presents the results of a study based on the Finite Element Method, in which, starting from the numerical model defined for analysis, the stresses in the interface between dry-set mortar and ceramic tiles under thermic efforts were examined. These efforts were analysed with dry-set mortar in three different situations: by changing the thickness of the rendering, the thermal absorption coefficient of tiles and the ceramic tile grout used in the façade model studied. It is possible to observe that when the thickness of the rendering increases, there is a slight reduction of normal stresses throughout the Y axis. Moreover, stresses increase approximately 60% when ceramic tiles with higher absorption coefficient are used. The use of ceramic tile grout with lower elasticity modulus produces higher normal stresses throughout Y axis in joint areas and lower stresses in the centre of the ceramic tiles, which are submitted to a flexural effort. This result reinforces the importance of the test for determining the flexural resistance modulus, as described by Brazilian standards.
publisher	ANTAC - Associação Nacional de Tecnologia do Ambiente Construído
publishDate	2008
url	https://seer.ufrgs.br/ambienteconstruido/article/view/3417
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Analysis of the stresses in the interface between dry-set mortar and ceramic tiles under thermic efforts

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