Strength Improvement of Subgrade in Clayey Soil by Geosynthetics and Sugarcane Bagasse ASH

Geo-synthetics are revolutionary products and has tremendous uses in the field of road construction and are widely used as are inforcement to increase strength of the soil. This paper discloses the strength improvement of subgrade by using geo-synthetics and sugarcane bagasse ash. Geotextiles has been effectively used for reinforcement of soil to recover the bearing capacity. Sugarcane bagasse ash (SBA) is an industrial waste, and is difficult to dispose. Sugarcane bagasse ash is an effective stabilizer for subgrade soils. Geotechnical properties of soil were determined. By adding different percentage of SBA like 5%, 10%, 15% and 20% the optimum percentage of SBA were determined. CBR test were conducted for four configurations each with and without optimum SBA. The different configurations are; one with geotextile at top, second one with geogrid at middle, third one with geogrid at middle and geotextile at top, fourth one with combination of geogrid and geotextile atthe top. And acomparative study was conducted between the results. The data obtained from the California bearing ratio(CBR) test shows an increment in the strength of subgrade from 1.67 to 7.08% when placing both Geogrid and Geotextile at top with SBA.