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Influence of the Microstructure in the Acoustical Performance of Consolidated Lightweight Granular Materials

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Abstract

This paper reports an investigation of the acoustical performance of consolidated lightweight granular materials, made of perlite, arlite and vermiculite mixed with polyurethane resin. These materials could help combat the noise control and replace some products that lack the sufficient structural strength and require expensive protection when exposed to the elements. The advantages of using these composites in acoustic applications, like noise barriers, compared with commercial materials, are their very light mass combined with a relatively high structural strength, high physical–chemical stability and low cost. Besides, these materials could be considered more acceptable, from the health point of view, and better suited to operate in an aggressive environment. Acoustical properties were assessed according to ISO 10534–2: 1998. The microstructure, through non-acoustical properties (porosity, tortuosity and flow resistivity), and the acoustical performance (sound absorption spectrum and normalized acoustic impedance) were studied, showing the influence of the non-acoustical properties in the acoustical performance.

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Acknowledgments

We thank the supply of materials to Perlindustria S.L. (Vallirana, Spain).

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Authors and Affiliations

  1. Instituto Tecnológico de Rocas Ornamentales y Materiales de Construcción, INTROMAC, Campus Universidad de Extremadura, 10071, Cáceres, Spain

    Rubén Maderuelo-Sanz

  2. Universitat Politècnica de València, Campus de Alcoy, Plaza de Ferrándiz y Carbonell, s/n. 03801, Alcoy, Spain

    Antonio V. Nadal-Gisbert, José E. Crespo-Amorós, Francisco Parres-García & Ernesto Juliá Sanchis

  3. Departamento de Física Aplicada, Escuela Politécnica, Universidad Extremadura, 10003, Cáceres, Spain

    Juan Miguel Barrigón Morillas

Authors
  1. Rubén Maderuelo-Sanz
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  2. Antonio V. Nadal-Gisbert
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  3. José E. Crespo-Amorós
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  4. Juan Miguel Barrigón Morillas
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  5. Francisco Parres-García
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  6. Ernesto Juliá Sanchis
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Correspondence to Rubén Maderuelo-Sanz.

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Maderuelo-Sanz, R., Nadal-Gisbert, A.V., Crespo-Amorós, J.E. et al. Influence of the Microstructure in the Acoustical Performance of Consolidated Lightweight Granular Materials. Acoust Aust 44, 149–157 (2016). https://doi.org/10.1007/s40857-016-0048-5

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  • DOI: https://doi.org/10.1007/s40857-016-0048-5

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