Influência dos parâmetros de ensaio na determinação da resistência de aderência de revestimentos de argamassa
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Data
2009-12
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Resumo
The testing of tensile bond strength, one of the main parameters to evaluate the
performance of mortar renderings, is prescribed by different national and
international standards. However, the existence of conflicting or under-specified
parameters causes high variability of results for the same test situation. Hence, the
aim of this study is to evaluate the influence of certain test parameters in the
variability of the results for bond strength. The study was done in two stages: using
a computer model using the Finite Element Method (Ansys® program), and an
experimental study (in a laboratory), by doing tensile bond strength tests on
mortar renderings applied on concrete slabs, with a total of 530 specimens. The
results show that the geometry and dimension of the test specimen, the cutting
procedure, the equipment type, loading rates and eccentricity contribute to the
variability of the results. Additionally, there was a direct relationship between
bond strength and the moisture of the rendering at the time the test was
undertaken.
Descrição
Palavras-chave
Revestimento, Rendering, Argamassa, Elementos finitos, Mortar, Normalização, Test method, Aderência, Finit element, Sstandard, Bond
Citação
COSTA, Eliane Betânia Carvalho; CARASEK, Helena. Influência dos parâmetros de ensaio na determinação da resistência de aderência de revestimentos de argamassa. Ambiente Construído, Porto Alegre, v. 9, n. 4, p. 37-49, out./dez. 2009.