Improvement of mechanical properties of continuous fiber reinforced sand

The improvement in the mechanical properties of the continuous fiber reinforced sand is investigated in terms of the shear strength and the resistance to the erosion. The improved reinforcement method using cement is applied to volcanic sandy soil, Shirasu, as well as ordinary sand, Kimitsu sand. It is found that the anisotropy of the fiber reinforced sand is not affected much by the cement content The highest shear strength is obtained when the thread is arranged to be normal to the shear plane. With the increase in the cement content, the peak shear resistance increases and the shear deformation is decreased. The resistance against the erosion increases enormously by the cement content Therefore, it is concluded that the mechanical properties of the reinforced sand are improved much by adding cement