Análise de desempenho térmico e acústico em paredes de concreto segundo a NBR 15575/2013

Abstract

The ABNT NBR 15.575 “Housing Buildings – Performance” standard represents a significant technological advance for the brazilian construction industry sector. Performance standards are conditions seeking to meet users' criteria, which, in the case of NBR 15.575, refer to the systems that make up residential buildings, regardless of their constituent materials and the construction system used. Before this, the present work aims to analyze the acoustic and thermal performance guidance, based on ABNT NBR 15.575, of the residential Morada do Leste in Santa Maria, RS. The analyzes were carried out by MMC LAB Controle Tecnológio Ltda laboratory, which carried out the following main tests: Measurement of Air Noise Insulation Between External Vertical Fence Systems – Concrete Wall and Aluminum Frame; Measurement of Air Noise Insulation in Internal Vertical Fence Systems – Concrete Wall; Measurement of Air Noise Insulation in Internal Vertical Fence Systems – Concrete Walls and Apartment Entrance Doors; Measurement of Impact Noise Insulation in Flooring Systems – Slab, Subfloor and Floor Covering; Measurement of Air Noise Insulation in Internal Vertical Fence Systems – Concrete Wall between Room and Staircase and Thermal Performance Assessment, by Computer Simulation according to NBR 15.575 – Prolonged Permanence Environments (APP) and Transient Permanence Environments (APT). Thermal performance is the result of the interaction between the building and the thermal environment to which it is subjected or its exposure conditions and the acoustic performance of environments is the result of the combination of several determining factors, including: climatic condition, environmental conditions, implementation and condition of the building. Through these measurements and analyses, it was found that the acoustic performance analyzes comply with NBR 15575, varying the performance indexes between minimum, basic and superior and the thermal performance analyzes compared with minimum acceptable values, that is, it is also in accordance with the NBR15575. The construction system with concrete walls showed adequate performance, as it manages to reach the values required by the Performance Standard, enabling its use in different typologies and in different geographic regions, as the standard states that climate, historical of site temperatures and the construction environment for testing.