Pullout Testing of Geogrids in Tire Shreds and Rubber-Sand

    Published: Jan 1997

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    The results of a direct shear and pullout testing program conducted to evaluate the interaction properties of three types of flexible geogrids having 2 cm, 5 cm and 10 cm square apertures within two types of backfill materials are presented. The first backfill material was a 5 cm nominal size tire shred fill and the second backfill material was a rubber-sand mixture consisting of a blend of 5 cm tire shreds and sand. Direct shear testing was conducted using a large direct shear box having plan dimensions of 30 cm by 30 cm and a total depth of 23 cm. Pullout tests were carried out in a large pullout box having plan dimensions of 1.2 m in length by 0.9 m in width and 0.5 m depth. Coefficients of interaction between 0.22 to 0.49 for tire shreds and 0.25 to 0.53 for rubber-sand were calculated.


    lightweight fill, tire shreds, rubber-sand, direct shear tests, pullout tests, geogrids, coefficient of interaction

    Author Information:

    Bernal, A
    Project Engineer, Civil Engineering, Purdue University, CaracasWest Lafayette, VenezuelaIN

    Swan, RH
    Laboratory Manager, Soil-Geosynthetic Interaction Testing, GeoSyntec Consultants, Atlanta, GA

    Salgado, R
    Assistant Professor, Civil Engineering, Purdue University, West Lafayette, IN

    Lovell, CW
    Professor Emeritus, Civil Engineering, Purdue University, West Lafayette, IN

    Committee/Subcommittee: D18.02

    DOI: 10.1520/STP15646S

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