Investigations on the use of granulated scrap tire rubber chips as geomaterials are in progress recently. Assuming that tire rubber chips could be used as geomaterials, 2mm sized tire rubber chips specimens are evaluated here for constant effective stress tests, isotropic pressure loop tests, and triaxial compression tests, quietly in a similar way as tested for soil materials. As of the test results, the concept of effective stress for common soil is also found to be similarly applicable for tire rubber chips. Tire rubber chips show non-compressive behavior under isotropic pressure conditions, and depict elastic type behavior in isotropic pressure loop tests. For the failure criteria of tire rubber chips, failure line in consolidated drained shear tests and that of consolidated undrained shear tests are clearly found to be conformed into two trends.

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