Resíduos de poli (tereftalato de etileno) e de pneu na confecção de pisos flutuantes para o isolamento do ruído de impacto
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Data
2009-08-21
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Universidade Federal de Goiás
Resumo
The demographic growth has created a gain in urban solid waste that deteriorates the citizen s
quality of life. High buildings represent the main way for accommodations in big cities for
these growing urban populations. However, impact sound insulation has shown itself quite
poor. In order to propose an alternative way of minimization to the two problems, residue
generation and impact noise, this study aimed to investigate the viability of using poly
(ethylene-terephthalate) - PET and rubber tire residues for impact sound insulation in floating
floors. Plates of 1 m² with thickness of 1.5 and 2.5 cm to 1:4 and 1:5 (ciment:residue) ratios
were molded for the acoustic experiments, as well as portable mortar slabs covered with high
and popular quality floor coverings. The main methods used were ISO 140-7 (1998) for
measuring the standardized impact sound pressure level, L nT, in one-third-octave bands and
ISO 717-2 (1996) to calculate the weighted standardized impact sound pressure level, L nT,w.
Both residues presented high sound insulation in relation to their references. It was observed
that the results for the PET specimen were superior to those of the rubber tires residue.
However, the results among the residues presented different tendencies as their ratio changed.
While the impact sound insulation of the rubber tires samples decreased with the increase of
residue, PET samples presented more insulation with residue increase. Another observed
factor was that the high quality floor covering presented a significant superior impact sound
isolation compared to the popular floor covering. Considering all results, it is possible to
conclude that the use of the studied residues in floating floors contributes to impact sound
insulation
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CARVALHO, Maria Luiza de Ulhoa. Poly (ethylene-terephthalate) and tyre residues in floating floors for impact sound insulation. 2009. 110 f. Dissertação (Mestrado em Engenharias) - Universidade Federal de Goiás, Goiânia, 2009.