Abstract
A series of laboratory tests has been carried out on sandy soil specimens reinforced with randomly distributed fiber to investigate the using of tire cord wastes as reinforcement. The strength and deformation characteristics of reinforced specimens were examined in unconfined compression and direct shear tests. These laboratory tests were performed on the specimens with 0% up to 1% fiber content and 10, 20 and 30 mm in length. The influence of fiber content and length of fiber on the reinforced sandy soil properties were studied. The results of tests indicated that the inclusion of tire cord fiber increases the unconfined compressive strength of the specimens and can change the brittle behavior of the sandy soil to more ductile one significantly. Also, it was observed that fiber reinforcement increases the peak shear strength and internal friction angle value of the soil samples in direct shear tests. However, the peak shear strength of specimens is insignificantly affected by the fiber length. Furthermore, initial stiffness for reinforced sandy soil decreases with increase in the length of fibers in some cases.
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