Avaliação do desempenho térmico de argamassas de revestimento

Abstract

This research aims to contribute to the use of new materials whose thermal performance is satisfactory taking as reference the standards NBR 15575 and NBR 15220. Five coating mortars were studied: conventional mortar, FIDA thermal mortar and mortars with 30% of addition of rubber powder, PET sand and mortar residue. Two flat plates were molded for each mortar mentioned to determine the thermal capacity. Subsequently, these mortars were applied to structural masonry walls, which had their surface exposed to an external heat source. The surface on the opposite side of the heat source was monitored with a thermographic camera. The best performing mortar was thermal mortar, but it was found that mortars with the addition of rubber powder and PET sand also have potential as an alternative for thermal insulation. It was also observed that the rendering mortar contributes surface temperature distribution, besides being important for the wall sealing system, thus improving the thermal comfort.