Avaliação do uso de resíduos como agregado em placas cimentícias para isolamento acústico do ruído de impacto em sistema de contrapiso leve estilo "sanduíche"

Abstract

The main objective of the present work is to verify the potential of incorporating residues of ethylene vinyl acetate (EVA) and polyethylene terephthalate (PET) in the manufacture of cementitious slabs for impact sound insulation like "sandwich" system os construction, showing which one is more effective based on the requirements presented in NBR 15575-3 (ABNT, 2013). The methodology used for the research presents the relevant characteristics of the materials, such as characterization, particle size composition and unit mass, in addition to the trace conversion used of 1: 5: 0.5 (binder: agglomerate: water) from volume to weight for the confection of the subfloor models in sizes 1m x 1m x 2.5cm. In a prototype of two floors, with the plates produced, these sample were acoustically tested following the requirements of ISO 16283-2: 2020, where no upper floor (emitting room) was placed the impact machine on the "sandwiches" to be tested and, without a lower floor (receiving room), repositioned the microphone five times for each measurement. The weighting of the values found for comparison with a performance standard was carried out in accordance with ISO 717-2: 2020, concluding that a sample with PET residue had a slightly superior performance than EVA, although both residues were considered to fall within the intermediate classification. of the standard and criteria for further tests to prove the results found. [resumo fornecido pelo autor]