CONSOLIDATION CHARACTERISTICS OF LATERITIC SOIL TREATED WITH RICE HUSK ASH

Lateritic soil was treated with 0, 4, 8, 12 and 16% rice husk ash (RHA) by dry weight of to determine its consolidation properties. Test carried out include; particle size distribution, specific gravity, compaction test varying compactive efforts (British Standard Light (BSL), West African (WAS) as well British Heavy (BSH)) test. Samples for were compacted then cured 7, 28 56 days; subjected one dimensional testing observe the influence curing period effort on characteristics. Index tests showed improved geotechnical The maximum density (MDD) BSL decreased a rise in RHA content from 1.72 1.42 Mg/m3 while optimum moisture (OMC) increased 16.5 27.3% doses 0 up 16%. Similar trend observed WAS BSH energies. Pre-consolidation pressure increment also increase both few exceptions. At 12% content, 65 66.5kN/m2 at 7 days respectively. Increase caused decrease Compression (Cc) Swelling (Cs). period. There no Swell As increased, swell index decreased. reduced Coefficient Volume Compressibility (Mv) Consolidation (Cc). Curing have effect Mv Cc. Based results obtained, atleast using energy level properties can be use engineering applications like embankment or rural roads.