Acoustic underlay manufactured from carpet tile wastes. Part 2: Comparative study of optimised underlay with commercial products of similar calibre in accordance to universal standards

• Autorzy: Miraftab M. , Rushforth I. , Horoshenkov K.
• Języki publikacji: EN

Abstrakty

EN

Carpet waste has successfully been converted into acoustic underlay materials that compete with commercial counterparts both in terms of performance and costs. This paper builds on an earlier paper [Miraftab et al, Autex Res.J.5(2), 96-105 (2005).] where granular/fibre mixing ratios, binder concentration and particle size distribution were shown to play a major role in maximising impact sound insulation capabilities of developed underlays. Product optimisation with respect to the particle size as governed by the aperture dimension and mean effective fibre length is further explored in this paper, and the developed underlay is compared with a selection of commercially available acoustic underlays. The results show that a 2mm-aperture screen at the granulating chamber output yields a waste stream with grains in the size range of 0.5-1.0mm and a mean effective fibre length of 2.75 mm which was most suitable to work with, and gave rise to samples with the best impact sound reduction performance. The optimised sample of 10mm recycled underlay (U2) appeared to perform better than most commercial systems tested. The manufactured underlay withstood, and in some instances, outperformed, during the standard tests as required within the BS 5808 protocol. The study concludes that recycling carpet waste to produce quality acoustic underlay with desirable impact sound insulation characteristics is technically feasible, and a viable alternative to landfill or incineration.

Słowa kluczowe

EN

underlay; acoustics; aperture; granulation; effective length; tensile strength; dynamic loading; compression; impact sound insulation

PL

odchylenie; akustyka; otwór; granulacja; długość efektywna; wytrzymałość na rozciąganie; obciążenie dynamiczne; kompresja; izolacja akustyczna

• Wydawca: Lodz University of Technology, Faculty of Material Technologies and Textile Design
• Czasopismo: Autex Research Journal
• Rocznik: 2006
• Tom: Vol. 6, no. 1
• Strony: 49--58
• Opis fizyczny: Bibliogr. 9 poz.

Twórcy

autor

Miraftab M.

• Centre for Materials Research & Innovation, University of Bolton, Deane Road, Bolton, BL3 5AB, U.K

autor

Rushforth I.

• Liverpool City Council, PO Box 858, Kingsway House, Hatton Garden, Liverpool, L69 3YD, U.K

autor

Horoshenkov K.

• School of Engineering, University of Bradford, Richmond Road, Bradford, BD7 1DP, U.K

Bibliografia

• 1. Miraftab, M., Rushforth, I., Horoshenkov, K., “Acoustic underlay manufactured from carpet tile wastes; Part 1: Effect of variation in granular/fibre dry ratio, binder concentration, and waste particle size on impact insulation of the produced underlays, AUTEX Research Journal, Vol. 5, No2, pages 96-105, June 2005.
• 2. WRAP report: “Recycling Carpet Waste into Acoustic Underlay for Commercial Production”, Waste & Resources Action Programme, available at www.wrap.org.uk (2004).
• 3. Rushforth, I., Horoshenkov, K., Miraftab, M. and Swift, M.: “Impact Sound Reduction and Viscoelastic Properties of Underlay Manufactured from Recycled Carpet Waste”, Applied Acoustics 66 (2005), 731-749.
• 4. British Standards Institute: “Specification for underlays for textile floor coverings”, BS 5808 (1991).
• 5. BS 4790: 1987, Method for determination of the effects of a small source of ignition on textile floor coverings (hot metal nut method).
• 6. BS ISO 2094:1999, Textile floor coverings. Determination of thickness loss under dynamic loading.
• 7. Miraftab, M., Horrocks, R. and Woods, C.: “Carpet waste, an expensive luxury we must do without”, AUTEX Research Journal 1, pp.1-7 (1999).
• 8. British Standards Institute: “Acoustics - Measurement of sound insulation in buildings and of building elements – Part 8: Laboratory measurements of the reduction of transmitted impact noise by floor coverings on a heavyweight standard floor”, BS EN ISO 140-8 (1998).
• 9. British Standards Institute: “Textiles - Tensile properties of fabrics – Part 1: Determination of maximum force and elongation at maximum force using the strip method”, BS EN ISO 13934-1 (1999).