RELATIONSHIP BETWEEN MECHANICAL PROPERTIES AND FIBER MIXTURE RATIO IN FIBER-REINFORCED SAND

Abstract

The strength and deformation characteristics of sand are improved by mixing the flexible short fibers. Many factors such as the mixture ratio, fiber materials, ?ber length and orientation a?ect the improvement e?ect of short ?ber reinforcement sands. Especially, the mixture ratio of short fiber is very important for the improvement and the design. In this study, we discussed the relationship between mechanical properties and the ?ber mixture ratio by the laboratory tri-axial compression tests. From the results, we could recognize the existence of optimum mixture ratio for the shear strength clearly. Moreover, we understood that the initial sti?ness becomes small according to the mixture ratio increasing.