Dissertação
Análise de desempenho do revestimento monocamada antes e após o envelhecimento acelerado proposto pela câmara de intemperismo
Fecha
2019-04-04Autor
Mauro Eugênio Lechi Vieira
Institución
Resumen
The current situation of the Civil Construction market has been forcing companies in
this trade to seek solutions to increase their competitiveness. In this context, the
monolayer system appears as an alternative to rationalize the constructive process
being normalized by ABNT only on 04/26/2018 (NBR 16648: 2018). In this paper, it is
evaluate the durability of monolayers produced before and after the publication of the
standard NBR 16648: 2018 by means of tests of impermeability (pipe method - CSTC
NIT 224: 2002) and tensile strength (NBR 15258: 2005) before and after the exposure
of prototypes submitted to aging cycles, equivalent to 6 years and 3 months of natural
exposure, using the "Accelerated Weather Chamber". The results of the leakproofness
test by the pipe method of the plates without the presence of lumps indicated lower
water absorption after the accelerated aging when compared to the plates without
weathering. The 490-day-old water plaques absorption was lower than the plaques
absorption at 72 and 80 days, indicating a trend of lower permeability of the decorative
technical mortars over time. Agglomerated and aged plates have presented higher
water absorption than plates without weathering, showing that the storage of product
interferes with the permeability of the applied decorative technical mortar. It was also
noted a correlation between the results obtained between the tensile strength and the
leakage, and the results for the studied plates. The tensile adhesion strength of the
plates with and without weathering were adequate in relation to Sinat (2016) and NBR
16648:2018 standards. No changes in shading and surface cracking were detected in
the wet plates, both for the plates without and for the plates with weathering after the
tests were carried out.