Clayey Soil Stabilization using Fine Sand for Sub-grade Improvement

Abstract

Clayey soil is one of the problematic soils, as it is vulnerable to high volumetric change (swelling and shrinkage), high plasticity properties, and other engineering related problems. Problem soils might be cart away as a spoilt and borrow materials supplied which is very expensive. Different percentages of fine sandy soils (0, 25, 50, 75, and 100%) were used to stabilize clay soil. The samples of sandy soil were obtained from the Federal Polytechnic Damaturu after removing the topsoil and that of clay soil were collected by Waziri Ibrahim Housing estate Damaturu. Fine sand was used to stabilize the clay soil. Engineering properties of clay and sandy soils were determined. The tests carried out include: Atterberg’s limits, compaction, sieve analysis and CBR. It was deduced that 50% replacement of clayey soil with fine sand is the optimum as it produced the highest maximum dry density, CBR value and minimum optimum moisture content.