ANÁLISE COMPARATIVA DO COMPORTAMENTO TÉRMICO ENTRE PAREDES EM LIGHT STEEL FRAMING E ALVENARIAS CONVENCIONAIS

Abstract

The Light Steel Frame (LSF) is a construction system made up of layers of different materials, including galvanized steel profiles, introduced in Brazil less time than conventional masonry vertical vertical sealing systems. The use of the LSF system adds to the work economical, sustainable, execution advantages and even benefits related to the acoustic and thermal performance of the building, due to the characteristics of the insulation of the materials used in the system. The objective of this work was the comparative evaluation of the thermal behavior between a mini wall in Light Steel Framing and masonry walls of ceramic bricks and concrete blocks, using thermal chamber simulation and the calculation of performance parameters. In order to do this, the following steps were taken: the construction of the mini walls, the calculation procedures according to the guidelines established by the NBR 15220 - 2 - Thermal performance of buildings and the evaluation through simulation, using a thermal camera made by the authors for collecting temperatures and a thermographic camera to obtain termograms. The results obtained through the calculations indicated that the mini wall in LSF presents thermal resistance almost 5 times higher than that of the ceramic and concrete block mini walls, besides having a high value of thermal delay, in agreement with the collected temperatures and the thermograms recorded. The comparative analysis of the results indicated that, in general, the mini wall of LSF showed better thermal behavior than the conventional walls of masonry.