Abstract
The strength and deformation characteristics of the granular sand are improved by mixing the flexible short fibers. Many factors such as the mixture ratio, fiber materials, fiber length and orientation affect the improvement effect of the short fiber reinforcement sands. Especially, the mixture ratio of short fiber is very important for the improvement and the design. In this study, we carried out a series of tri-axial compression tests of four kind of silica sands in order to investigate the relationship between the optimum mixture ratio and the average grain size. From the results, we can understand that the optimum mixture ratio of sand, whose grain size is larger, becomes smaller.
