STP1540

    Dynamic Behavior of Sand/Rubber Mixtures. Part I: Effect of Rubber Content and Duration of Confinement on Small-Strain Shear Modulus and Damping Ratio

    Published: Apr 2012


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    Abstract

    The paper examines the small-strain dynamic properties of mixtures composed of sandy soils with recycled tire rubber. For this purpose, the experimental results stemming from a torsional resonant column testing program on twenty four [24] saturated and dry specimens are analyzed. The percentages of rubber used range between 0 and 35 % by mixture weight. GO values increase whereas DTO values decrease systematically as the content of rubber decreases and the mean confining pressure increases. Based on the experimental results we propose an analytical relationship for the estimation of GO, which is expressed in terms of an equivalent void ratio that considers the volume of rubber solids as part of the total volume of voids, along with an analytical relationship for the estimation of DTO. Finally, the effect of the specimen's size and the duration of confinement on the initial shear modulus and damping ratio of the mixtures are also discussed.

    Keywords:

    shear modulus, damping ratio, resonant column testing, sand/rubber mixtures


    Author Information:

    Anastasiadis, Anastasios
    LecturerDept. of Civil Engineering, Aristotle Univ., Thessaloniki,

    Senetakis, Kostas
    Post-Doctoral Fellow, Dept. of Civil and Architectural Engineering, City University of Hong KongAristotle University of Thessaloniki,

    Pitilakis, Kyriazis
    Professor, Dept. of Civil Engineering, Aristotle Univ., Thessaloniki,

    Gargala, Chrysanthi
    Civil Engineer, Dept. of Civil Engineering, Aristotle Univ., Thessaloniki,

    Karakasi, Iphigeneia
    Civil Engineer, Dept. of Civil Engineering, Aristotle Univ., Thessaloniki,


    Paper ID: STP154020120011

    Committee/Subcommittee: D18.14

    DOI: 10.1520/STP154020120011


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