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    Volume 49, Issue 3 (July 2019)

    Experimental Validation of a New Antivibration Elastomeric Material Fabricated from End-of-Life Tires for Slab Track Systems with Embedded Rail

    (Received 9 November 2018; accepted 14 May 2019)

    Published Online: 12 July 2019

    CODEN: JTEVAB

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    Abstract

    This article is focused on the experimental characterization and validation of a novel elastomeric material fabricated from the grinded end-of-life tires blended with polyurethane resin. This material will be used as a vibration and noise attenuator in railway slab track systems with embedded rail, commonly used in urban areas. Cylinders with different combinations of grain sizes (coarse, medium, and fine) of end-of-life tires and contents of resin were mechanically tested to obtain the Young’s modulus. The most versatile combination consisting in 50 % coarse + 50 % medium size grains was selected. Two real-scale prototypes consisting of a rail surrounded by the rubber mixture and the concrete slab were designed and fabricated to be applied under normal conditions (low attenuation system) and under situations where vibrations could be fatal (high attenuation system). These prototypes were subjected to static, dynamic, and fatigue loading conditions, applying vertical and angular loads, to validate their mechanical performance. In addition, a vibroacustical experimental study was carried out to obtain the frequency response and the receptance functions. A one-degree-of-freedom analytical model was developed to obtain a loss factor η = 0.287 and a vibration attenuation capacity of the system for the human ear peak sensitivity of ∼40 dB. This study proves the validation of this new eco-friendly material to be used as a vibration attenuator for railway traffic.

    Author Information:

    Gómez, Jorge
    Technology and Innovation Division, ACCIONA Construction, Parque Empresarial La Moraleja, Madrid,

    Casado, José Antonio
    Department of Materials, Laboratory of Science and Engineering of Materials (LADICIM), University of Cantabria, E.T.S. de Ingenieros de Caminos, Canales y Puertos, Santander,

    Carrascal, Isidro A.
    Department of Materials, Laboratory of Science and Engineering of Materials (LADICIM), University of Cantabria, E.T.S. de Ingenieros de Caminos, Canales y Puertos, Santander,

    Diego, Soraya
    Department of Materials, Laboratory of Science and Engineering of Materials (LADICIM), University of Cantabria, E.T.S. de Ingenieros de Caminos, Canales y Puertos, Santander,

    Ferreño, Diego
    Department of Materials, Laboratory of Science and Engineering of Materials (LADICIM), University of Cantabria, E.T.S. de Ingenieros de Caminos, Canales y Puertos, Santander,

    Mondragón, Catalina
    Technology and Innovation Division, ACCIONA Construction, Parque Empresarial La Moraleja, Madrid,


    Stock #: JTE20180804

    ISSN:0090-3973

    DOI: 10.1520/JTE20180804

    Author
    Title Experimental Validation of a New Antivibration Elastomeric Material Fabricated from End-of-Life Tires for Slab Track Systems with Embedded Rail
    Symposium ,
    Committee D11