Sub-Grade Stabilization using Crumb Rubber and Rice Husk Ash

Abstract

In this project an endeavor has been made to examine the utilization of rice husk ash and Crumb rubber as a stabilizing agent in subgrade soil. Crumb rubber is a waste material of rubber tires. Crumb Rubber and rice husk ash was incorporated at 2.5%, 5%, and 7.5% by weight of virgin soil. In term of performance parameters CBR was evaluated using CBR testing machine. Compaction tests for OMC & MDD were conducted using standard proctor apparatus. Samples were prepared and tested for liquid limit and plastic limit using casagrande’s apparatus. Study concluded that CBR is increased and decreased respectively at 0.1 and 0.2 of penetration of stabilizers. It was observed that liquid limit and plastic limit of soil decreased and increased at 5% of both stabilizers respectively. Bearing capacity of soil in terms of CBR increased significantly up to 29% as compared to virgin CBR soil value i.e., 24% by adding 7.5% additives