Effect of wheat husk ash as a stabilizer on expansive soil

Construction and maintenance of highway is always expensive, some of the sub-grade soil always possess problem of expansiveness making it difficult in laying out the surface for road. Same goes for construction of structures. In order to enhance the properties of the soil stabilization can be done by using agricultural waste. For this study, Wheat Husk Ash (3%, 6%, 9% and 12%) is mixed with the expansive soil for different curing days (3, 7, 14, 28 and 60 days) and tests such as compaction, California Bearing Ratio is done to know he optimum content at which the soil can be utilised with the admixture to attain strength. The results according to the results shows that WHA of 9% showed development in strength wise to an improvement up to 246% at 60 days curing period with a CBR value of 10.94% compared to the untreated soil’s CBR value of 3.16%. Low cost, effectiveness and the utilisation of large amount of Wheat husk suitability was achieved by this method of soil improvement.