Tri-axial behaviour of steel fiber-reinforced sand
American Society of Civil Engineers
School of Engineering
Many soil improvement/stabilization methods are available for modifying the soil mass in order to increase the overall engineering performance of soil. In the conventional method of reinforced soil construction, the inclusions are normally oriented in a preferred direction and sequentially in alternating layers. Another soil strengthening technique is mixing of randomly distributed discrete fibers into the soil, similar to admixture stabilization in its preparation. The discrete fibers are simply added and mixed randomly with the soil. In the present study, the laboratory triaxial compression tests were carried out on soil specimens uniformly mixed with steel fibers at different confining pressures. Steel fiber contents having two different sizes (1 mm×2 mm and 1 mm×5 mm) were mixed with the cohesionless soil, and the effects of reinforcement content and size on failure strain, peak deviator stress, ultimate strength ratio, and initial tangent modulus/secant modulus were studied. The failure occurred between 5-9% of vertical strain and the optimum reinforcement content was around 4%. © 2019 American Society of Civil Engineers.