Strenth Properties of Fiber-Reinforced Soil Cement Composites with Ductility
Toshiaki SANEMATSU, Satoru MOCHIDA, Shumpei TANAKA and Tetsushi KANDA
Abstract:This study focused on strength properties of fiber-reinforced soil cement (hereafter FRSC), which contained PVA (polyvinyl alcohol) fiber with 14ƒÊm diameter, 8mm length, and 0.6% volume fraction. We conducted two series of experiments, mixing tests with different soil cement matrix mix proportions, and execution tests of FRSC column. As the result of material strength tests for laboratory mixed samples, improvement in tensile strength was the most significant: about four times higher than that of plain soil cement (hereafter SC). And modulus of rupture of FRSC also increased 2-3 times above those of SC. Execution test was conducted at loamy ground, using the machine for Soil Mixing Wall Method, and material strength tests of sampling specimen were carried out. Direction dependence of modulus of rupture was found, but executed FRSC column had approximately high-performance ductility close to that of laboratory mixed samples. Key Words:Soil cement, Fiber reinforcing, Short fiber, Soil improvement, In-situ strength, Execution test