Uso da lã de PET para a absorção sonora e o isolamento acústico

Sérgio Klippel Filho; Henrique S. Labres; Fernanda Pacheco; Roberto Christ; Josiane R. Pires; Rafael F. Heissler; Maria F. Oliveira

doi:10.55753/aev.v32e49.96

Authors

Sérgio Klippel Filho Instituto Tecnológico de Desempenho e Construção Civil – itt Performance, Unisinos, São Leopoldo, RS
Henrique S. Labres Instituto Tecnológico de Desempenho e Construção Civil – itt Performance, Unisinos, São Leopoldo, RS
Fernanda Pacheco Instituto Tecnológico de Desempenho e Construção Civil – itt Performance, Unisinos, São Leopoldo, RS
Roberto Christ Instituto Tecnológico de Desempenho e Construção Civil – itt Performance, Unisinos, São Leopoldo, RS https://orcid.org/0000-0003-1367-8972
Josiane R. Pires Instituto Tecnológico de Desempenho e Construção Civil – itt Performance, Unisinos, São Leopoldo, RS
Rafael F. Heissler Instituto Tecnológico de Desempenho e Construção Civil – itt Performance, Unisinos, São Leopoldo, RS https://orcid.org/0000-0001-8152-9640
Maria F. Oliveira Instituto Tecnológico de Desempenho e Construção Civil – itt Performance, Unisinos, São Leopoldo, RS

DOI:

https://doi.org/10.55753/aev.v32e49.96

Keywords:

airborne sound insulation, impact sound insulation, sound absorption, dynamic stiffness, compression creep, polymeric residue

Abstract

The increasing demand for solutions to achieve acoustic performance in buildings is a growing need in Brazilian civil construction, with a demand for characterization tests of new materials, many of them made from waste, with a view to meeting environmental issues, with the reduction of materials sent to sanitary landfills. In this context, the use of fibrous materials manufactured with polymeric waste can meet the specific demands in use for the insulation and acoustic conditioning of indoor environments. This article aims to present the characterization of PET wool in terms of acoustic insulation against airborne sound, insulation against impact sound and for sound absorption, based on laboratory tests, with variations in thickness and density of the material. The tests to determine the sound reduction index were carried out according to the procedures of ISO 10140:2010, with PET wool used to fill two types of drywall partitions. Impact sound insulation was determined for the material before and after compression during the floor's service life, based on theoretical models from ISO 12354:2017, based on dynamic stiffness laboratory tests, according to ISO 9052 -1:1989, and compression creep, in accordance with the procedures of ISO 20392:2007. For the impact sound insulation estimates, the use of wool in the form of an elastic layer of floating floors was considered. ISO 354:2003 procedures were used to determine the sound absorption coefficient in a reverberant chamber. The results indicate that the material has potential for use in the insulation and acoustic conditioning of environments, highlighting that: the increase in the density of materials does not considerably increase the insulation to airborne sound in drywall systems; after 10 years of use on floating floors, the material with the highest density will have maintained its initial acoustic performance; the sound absorption capacity of the materials used in this study is directly related to their density.

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