COMPACTION CHARACTERISTICS OF A-6 LATERITIC SOIL - RIVER SAND MIXTURE

Abstract

ABSTRACT Soil sample collected from Gidan Kaji Village, Niger State was classified as A-6 soil by American Association of State Highway and Transportation Officials (AASHTO) and clay oflow plasticity (CL) by Unified Soil Classification System (USCS), was mixed with river sand collected from a construction site. Compaction characteristic of the mixture were investigated at both British Standard Light (BSL) and West African Standard (WAS) energy levels. The sand were mixed at 0, 5, 10, 15, 20, 25 .......... and 100% of river sand each by weight of the lateritic soil. At BSL energy, result showed that the Maximum Dry .,./ Density (MDD) increases from 1.7770g/cm3 at 5% river sand to 1.947 g/cm3 at 80% river sand. The percentage increase is 9.09%. while at WAS energy level, the MDD increases from 1.904g1cm3 at 5% river sand to 2.085 glcm3 at 95% river san. The percentage increases 8.68%. Similarly, at BSL energy level the Optimum Moisture Content (OMC) decreases from 16.3% at 5% river sand to 12.9% at 75% river sand. The percentage decrease is 20.85%, while at WAS energy level, the OMC decrease from 14% at 5% river sand to 10% at 75% river sand. The average percentage decrease is 28.57%.