The influence of water loss by evaporation in the tensile adhesion strength between dry-set mortar and ceramic tiles

The influence of water loss by evaporation in the tensile adhesion strength between dry-set mortar and ceramic tiles

Open time is one of the main characteristics of dry-set mortars. Water loss by both evaporation and suction is an important factor that influences its performance, since it may cause an adhesion failure after short ageing. It was determined that open time has a tensile adhesion strength of 0,5 MPa....

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Hoofdauteurs: Póvoas, Yêda Vieira, John, Vanderley Moacyr, Cincotto, Maria Alba
Formaat: Online
Taal:por
Gepubliceerd in: ANTAC - Associação Nacional de Tecnologia do Ambiente Construído 2008
Online toegang:https://seer.ufrgs.br/ambienteconstruido/article/view/3414
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spelling ojs-article-34142008-05-09T18:22:23Z The influence of water loss by evaporation in the tensile adhesion strength between dry-set mortar and ceramic tiles Influência da perda de água por evaporação na resistência de aderência entre argamassa colante e placa cerâmica Póvoas, Yêda Vieira John, Vanderley Moacyr Cincotto, Maria Alba Argamassa colante; Tempo em aberto; Resistência de aderência; Perda de água por evaporação Open time is one of the main characteristics of dry-set mortars. Water loss by both evaporation and suction is an important factor that influences its performance, since it may cause an adhesion failure after short ageing. It was determined that open time has a tensile adhesion strength of 0,5 MPa. This research aims to study the influence of water loss by evaporation in the tensile adhesion strength between dry-set mortar and ceramic tile. A test of tensile adhesion strength is performed, considering different intervals of time of the ceramic tile application on the mortar, according to a procedure that eliminates water loss by suction. The mortar is spread onto a glass plate, avoiding water loss by suction. After specified intervals of time for the application of ceramic tile according to the open time test, the system is cured for 28 days at 23 ºC and 65% relative humidity. After being cured, the dry-set mortar/ceramic tile system is glued onto the concrete slab by the surface previously in contact with the glass, for later pull-out. The tension and form of rupture are observed. The results show the effect of water loss by evaporation on the tensile adhesion strength, and the analysis indicates that a simple test of water loss by evaporation can determine the tensile adhesion strength of the dry-set mortar. O tempo em aberto é considerado um dos principais requisitos de desempenho de argamassas colantes. Um dos fatores mais importantes que o influencia é a perda de água. Ela ocorre tanto por sucção pela base quanto por evaporação para o meio ambiente. Esta perda de água diminui progressivamente a resistência de aderência do revestimento cerâmico. Convencionou-se que o tempo em aberto é aquele que tem resistência de aderência de 0,5 MPa. Esta pesquisa tem como objetivo estudar a influência da perda de água da argamassa, por evaporação, na resistência de aderência entre a argamassa colante e a placa cerâmica. Para tanto é determinada a resistência de aderência considerando diferentes intervalos de tempo de assentamento da placa cerâmica após a aplicação da argamassa, segundo um procedimento de ensaio que elimina a perda de água por sucção. A argamassa é espalhada sobre uma placa de vidro de modo a impedir a sucção. Passados os intervalos de tempo especificados para o assentamento da placa cerâmica, conforme o ensaio de tempo em aberto, o conjunto é curado durante 28 dias a 23 ºC de temperatura e 65 % de umidade relativa. Após esse período, o conjunto argamassa/placa cerâmica é colado sobre o substrato-padrão, pela superfície anteriormente em contato com o vidro, para posterior arrancamento, observando-se a tensão e a forma de ruptura. Os resultados mostram que a variação na resistência de aderência das placas cerâmicas pode ser atribuída à evaporação, o que significa que ao realizar um ensaio simples de perda de água por evaporação, pode-se determinar a resistência de aderência da argamassa colante. 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/3414 Ambiente Construído; v. 2, n. 2 (2002): Edição Especial Tecnologia das Argamassas; 7-18 Ambiente Construído; v. 2, n. 2 (2002): Edição Especial Tecnologia das Argamassas; 7-18 Ambiente Construído; v. 2, n. 2 (2002): Edição Especial Tecnologia das Argamassas; 7-18 1678-8621 1415-8876 por https://seer.ufrgs.br/ambienteconstruido/article/view/3414/1828 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 Póvoas, Yêda Vieira
John, Vanderley Moacyr
Cincotto, Maria Alba
spellingShingle Póvoas, Yêda Vieira
John, Vanderley Moacyr
Cincotto, Maria Alba
The influence of water loss by evaporation in the tensile adhesion strength between dry-set mortar and ceramic tiles
author_facet Póvoas, Yêda Vieira
John, Vanderley Moacyr
Cincotto, Maria Alba
author_sort Póvoas, Yêda Vieira
title The influence of water loss by evaporation in the tensile adhesion strength between dry-set mortar and ceramic tiles
title_short The influence of water loss by evaporation in the tensile adhesion strength between dry-set mortar and ceramic tiles
title_full The influence of water loss by evaporation in the tensile adhesion strength between dry-set mortar and ceramic tiles
title_fullStr The influence of water loss by evaporation in the tensile adhesion strength between dry-set mortar and ceramic tiles
title_full_unstemmed The influence of water loss by evaporation in the tensile adhesion strength between dry-set mortar and ceramic tiles
title_sort influence of water loss by evaporation in the tensile adhesion strength between dry-set mortar and ceramic tiles
description Open time is one of the main characteristics of dry-set mortars. Water loss by both evaporation and suction is an important factor that influences its performance, since it may cause an adhesion failure after short ageing. It was determined that open time has a tensile adhesion strength of 0,5 MPa. This research aims to study the influence of water loss by evaporation in the tensile adhesion strength between dry-set mortar and ceramic tile. A test of tensile adhesion strength is performed, considering different intervals of time of the ceramic tile application on the mortar, according to a procedure that eliminates water loss by suction. The mortar is spread onto a glass plate, avoiding water loss by suction. After specified intervals of time for the application of ceramic tile according to the open time test, the system is cured for 28 days at 23 ºC and 65% relative humidity. After being cured, the dry-set mortar/ceramic tile system is glued onto the concrete slab by the surface previously in contact with the glass, for later pull-out. The tension and form of rupture are observed. The results show the effect of water loss by evaporation on the tensile adhesion strength, and the analysis indicates that a simple test of water loss by evaporation can determine the tensile adhesion strength of the dry-set mortar.
publisher ANTAC - Associação Nacional de Tecnologia do Ambiente Construído
publishDate 2008
url https://seer.ufrgs.br/ambienteconstruido/article/view/3414
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