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|Type:||Artigo de evento|
|Title:||Premolded Panels With Recycled Rubber|
|Abstract:||The possibility of transforming used tyre rubber from residue to a by-product is the main approach in these studies developed with this material so far in Brazil. Premolded panels with different percentages of rubber were examined. It is possible to improve characteristics of existent products to obtain more deformation with good noise attenuation of the material. A sequence of problems relating to undesirable noises can be solved. Among other advantages involved in the recycled process of tyre rubber in civil construction is the use of waste products contributing to environmental conservation, consequently attending the standards 258-99 and 301-03 of CONAMA (National Environment Council of Brazil). These standards determine that tyre rubber importers and producers have until 2005 to correct the destination of all residue production. Another benefit is the solution to serious problems of public health, beyond the cost reduction due to the substitution of part of the sand by a low cost product. This paper analyzed the possibility of improving the acoustic isolation of premolded panels (reference and three different percentages of rubber 5%, 10% and 15% in substitution of the fine aggregate, in volume). These panels were tested in a reverberation room at the Building Systems Development Laboratory of Furnas Centrais Elétricas S. A., according to the standard ISO -140-3 and ISO 717-1. Analyzed through the Sound Reduction Index (R) and Weighted Sound Reduction Index (Rw), the premolded panels with rubber compared among themselves presented improvement in noise attenuation according to the increase in rubber percentages.|
|Appears in Collections:||Artigos e Materiais de Revistas Científicas - Unicamp|
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