Comparative analysis of strength and deformation characteristics of clayey soil, when treated with fly ash and ground granulated blast furnace slag

Abstract

Clayey soils swell on absorbing water and shrinks on drying, any constructions built on them are subjected to the differential settlements due to the loss of support from soil. Stabilization of clays with various additives have considerable successes. Lime, cement, CaCl₂, fly ash (FA), ground granulated blast furnace slag (GGBS), pond ash and other chemical reagents have been effective in stabilizing expansive soils and improving their characteristics like strength. This paper presents the comparison for strength and compressibility characteristics of clays when treated with FA and GGBS. In this investigation, FA content of 10%, 15%, 20%, 25% and GGBS of 10%, 15%, 20%, 25% were been used with the soil. The strength was observed to be high at 20% of FA & 20% of GGBS when compared with normal clayey soil. The time required for 90% consolidation and compression index were considerably reduced for both FA and GGBS at addition of 20% to soil.