Preliminary Investigation To Use Water Hyacinths (emboch) For Stabilization Of Expansive Soils A Case Study On Source Of Water Hyacinth Laketana

Since long, improvement in characteristics of expansive soil by using different materials hasrnbeen a challenging job for engineers. Construction in the 21st Century saw the advancement of arnlarge number of new materials and products accompanied by the emergence of new methods forrnthe utilization of waste materials. Many researchers have made an attempt with the use ofrndifferent materials like cement, Fly ash, lime Etc. but the aim of this study is to stabilizernexpansive soils by the use of water hyctine locally known as „emboch‟.rnThe Expansive soil, collected from Ayira, Gondar, has been classified as an A-2-7 soil on thernAASHTO classification. It was stabilized using a dry water hyctine from 5% to 15%rnreplacement by dry weight of the soil. The effect of the additives on the soil was investigatedrnwith respect to atterberg limits, Specific gravity, free swell, moisture density relationshipsrnCalifornia bearing ratio (Soaked CBR) and CBR Swell.rnAfter the investigation, with the increment of water hyctine (WH), it was found that the optimumrnmoisture content increased until 10% and decreased on 15% while the maximum dry densityrnvalues decreased until 10% and increased on 15%. Free swell ratio of the stabilized samplesrndecreased with increasing WH content. CBR values slightly increased with the addition of WH.rnThe CBR of the soil at 15% of WH almost fall in to the category of fair sub grade. This shows arnpotential of using WDE as potential material in stabilization of expansive soils.

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