Análise do desempenho térmico, acústico e de resistência ao fogo em argamassas de revestimentos aditivadas com argila expandida

Abstract

The civil construction goes through a process of updating technologies, construction methods and manpower, in order to provide comfort, well-being and security for the whole population. Technological innovations increasingly assume a fundamental role in this advance, working directly with new formulations and additions of materials. In this context, the present work aims to study the influence of the addition of laminated expanded clay to the coating mortars, acting in thermal, acoustic and resistance properties under high temperatures. The methodology developed was divided into three parts, the first consisted in analyzing the thermal behavior of the coating mortar (conventional coating, with addition of 30% and 50% expanded clay) applied to masonry walls; in part two, the sound reduction caused by the addition of clay to the insulating coating in wooden boxes was verified; in the third part, 15 cylindrical specimens were molded and submitted to five temperature ranges: ambient; 250 ° C, 500 ° C, 750° C and 1000 ° C; later they were abruptly cooled and tested for compressive strength. In view of the study carried out, significant reductions were obtained in relation to thermal and acoustic tests, with reductions of 4dB and approximately 3.8°C, respectively; for the tests submitted to high temperatures, an increase in the resistance of the test bodies was obtained, at a temperature of 750°C.