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Technology and Engineering
- ISSN: 2333-2581
- Modern Environmental Science and Engineering
Evaluation of Physical Properties and Acoustic Performance the Agglomerates of Wood Pellets Polyurethane Residue
Ana Maria Coulon Grisa, Raber R, Nunes M. F. O. and Zeni M.
Universidade de Caxias do Sul, Brazil
Abstract: One of the biggest problems faced nowadays is the incorrect disposition of residues in the environment; creating a big volume of material. In order to reduce the quantity of material thrown in the environment and, at the same time, provide an alternative of reusing it, combined with a possibility of reducing the noise issued in constructions, the polyurethane residue agglomerates were made with wood particles. The objective of the present study was to evaluate the performance of agglomerates fabricated with different proportions of wood’s particles of Eucalyptus Grandis Hill ex Maiden and polyurethane granular solids from footwear sector of Três Coroas/RS city, using as binding agent Elastan 8004/Br, a pre-polymer. The proportion of polyurethane granular solids and wood particles used were 0/100, 15/85, 30/70, 45/55 e 60/40% (m/m). The performance of agglomerates was evaluated by water absorption and thickness swelling at 24 hours and acoustic performance in relation to airborne noise. Polyurethane addition caused reducing the values of water absorption and thickness swelling. The acoustic performance of materials showed that the agglomerates with 40/60%
of PU has the highest reductions in sound level and, consequently, the better sound insulation.
Key words: agglomerates, polyurethane granular solids, wood particles, acoustic performance
