Engineering Properties of Soil Mixed with Synthetic Yarn and a Small Amount of Cement

Abstract

Sand mixed with continuous yarn gains higher shear resistance and more stability. An attempt has been made to further improve its properties by adding a small amount of cement to the sand mixed with yarn. Our laboratory study indicates that the compressive strength of cement-treated yarn-reinforced sand is 2 to 3 times as great as that of the sand mixed with the same small amount of cement, being much higher than that of the sand reinforced with yarn alone. When the cement content is less than 6%, the permeability of the sand mixed with yarn and cement showed no reduction, suggesting no harmful effect on grass growing on the surface of the improved soil. Similar satisfactory results were obtained of Kanto loam mixed with yarn and cement or lime.