THE EFFECT OF NICKEL SLAG ADDITION ON THE CBR VALUE OF SOAKED LATERITE SOILS IN CENTRAL AND SOUTH KALIMANTAN PROVINCES

Abstract

Lateritic soil as base fill in road construction often requires extra handling because it does not have adequate strength and stability. These extra handling efforts can be carried out by stabilizing laterite soil by mixing certain ingredients such as lime, cement, or similar materials to boost the ability of the lateritic soil to approach road pavement standards. In this study, the material used to stabilize the laterite soil was nickel slag waste. The test was conducted out using an experimental approach in the laboratory with variations of a mixture of laterite soil and nickel slag waste of 0%, 5%, 10%, 15%, 20%, and 25%. The Atterberg test, Grain Distribution, and Specific Gravity (GS) were used in this study to assess the physical qualities and features of native soils from Central and South Kalimantan. In addition, the CBR Soaked was tested on each version of the mixture with the increase in Soaked CBR value in Central Kalimantan soil from 2.53% to 5.87%, and the resulting increase in Soaked CBR value in South Kalimantan soil from 2.8% to 6.08%.