In order to reduce the brittleness of soil stabilized by lime only, a recent study of a newly proposed
mixture of fiber wastes and lime – rice hush ash mixtures for ground improvement is described in this
paper. The research was conducted to investigate the influence of the mixture of wastes fibers on the
mechanical properties of the stabilized clay soil with lime-rice husk mixtures. The amount of lime and
rice husk ash was used 12% by dry weight of soil specimen. The fiber content and length are 0.4% (by
weight of the parent soil) and 2 mm respectively. The specimens were subjected to triaxial tests under
unconsolidated – undrained condition (UU) condition which is tested after 3, 7, 14 and 21 days of
curing. Stress and strain relationship shows the post-peak stress which indicating ductility behavior of the treated soil. It was found that the addition of fibers contributed significantly on the shear strength parameters of the treated soil and the shear strength increased with increasing the curing time.