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Rubber crumb as granular absorptive acoustic material

AutorPfretzschner, Jaime
Palabras claveAcoustic noise barriers
Waste tyre crumbs
Scrap tyre reuse
Tyre processing technologies
Environmental pollution
Granular material
Acoustic absorption process
Acoustic wall
Traffic noise
Fecha de publicaciónsep-2002
EditorSociedad Española de Acústica
CitaciónForum Acusticum Sevilla 2002. Environmental Acoustics, Noise and Vibration. Absorbing Materials ; MAT-01-005-IP
ResumenWe have developed a research project on the use of scrap tyres as absorbers in acoustic noise barriers for highways. This project is based on the aims for the period 2000-2006 of the Scrap Tyres Working Group of the EU concerning the discovery of new uses and tyre processing technologies to reduce the percentage of waste tyre crumbs and thus minimise the environmental pollution produced by this type of waste.
Besides reducing the noise in neighbouring residential areas, such a barrier would also act as an elastic wall for crashes. The paper describes the theoretical basis (under the phenomenological behaviour of the material) of the acoustic absorption process inside the granular material. Experimental results are given, followed by the optimisation of the shape and dimensions of an acoustic wall, in order to achieve the maximum absorption compatible with a controlled volume of consumed rubber crumb.
Descripción6 pages, 3 figures.-- PACS nrs.: 43.50.Rq, 43.55.Ev.-- Communication presented at: Forum Acusticum Sevilla 2002 (Sevilla, Spain, 16-20 Sep 2002), comprising: 3rd European Congress on Acoustics; XXXIII Spanish Congress on Acoustics (TecniAcústica 2002); European and Japanese Symposium on Acoustics; 3rd Iberian Congress on Acoustics.-- Special issue of the journal Revista de Acústica, Vol. XXXIII, year 2002.
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