Investigations on Sand Reinforced with Different Geosynthetics

    Volume 29, Issue 6 (November 2006)

    ISSN: 0149-6115

    CODEN: GTJOAD

    Published Online: 14 June 2006

    Page Count: 8


    Latha, MG
    Assistant Professor, Indian Institute of Science, Bangalore,

    Murthy, VS
    Research Student, Indian Institute of Science, Bangalore,

    (Received 7 February 2006; accepted 15 May 2006)

    Abstract

    This paper presents results of triaxial compression tests on sand reinforced with different types of geosynthetics in different layer configurations to study the effect of quantity of reinforcement and tensile strength of the geosynthetic material on the mechanical behavior of geosynthetic-reinforced sand. The reinforcement types used are woven geotextile, geogrid, and polyester film. The layer configurations used are two, three, four, and eight horizontal reinforcing layers in a triaxial test sample. From the triaxial tests, it is found that the geosynthetic reinforcement imparts cohesive strength to otherwise cohesionless sand. The effect of reinforcement on the friction angle was found to be insignificant. The magnitude of imparted apparent cohesion is found to depend not only on the tensile strength of the geosynthetic material but also the surface roughness changes during loading. Special triaxial tests using rice flour as the reinforced medium, microscopic images, and surface roughness studies revealed the effect of indent formation on the surface of polyester film, which was the reason for the unusually high strength exhibited by the sand reinforced with polyester film.


    Paper ID: GTJ100439

    DOI: 10.1520/GTJ100439

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    Author
    Title Investigations on Sand Reinforced with Different Geosynthetics
    Symposium , 0000-00-00
    Committee D18