CONSOLIDATION CHARACTERISTICS OF EXPANSIVE SOIL TREATED WITH SILICA FUME AND VARIOUS CHEMICALS

Abstract

Constructions on expansive soil are challenging and thus prone to some problems and litigation. The engineers make extensive use of local experience and empirical procedures to address these problems. Although there has been extensive study of expansive soils and foundations on expansive soil, data related to performance of residential structures are limited in general and limited in the phoenix area, in the particular. In this study an over view of the phoenix areas in India, mostly found in western and north western portions of the Andhra Pradesh. Consolidation of soil in an effective method for improvement of soil properties and the foundations and pavement system performance. Plasticity index is one of the improvement properties of soil to determine the behavior of soil in presence of water. Now days, soil stabilization is done using the waste material like silica fume, slags, rice husk ash.etc. In geotechnical engineering has been recommended from environmental point of view. The main objective of this study is to evaluate the feasibility of using silica fume as soil stabilization material. In this investigation of silica fume on engineering properties of expansive clay were studied with varying silica fume content from 5% to 20%. CaCl₂ Ca(OH)₂ and AlCl₃ (0.5 %,1.0%, and 1.5%) by weight of the dry soil, the experimental results showed a significant increase in CBR, and co-efficient of consolidation (Cv) compressive index (Cc) are decreased. The differential free swell of the clay is reduced from 110% to 30%. The proctor compaction result showed a small decrease in maximum dry content from this investigation was concluded that the silica fumehasas potential to improve the characteristics of black cotton soil.