Influence Of Stress-Strain Behavavior Of Soil Mixtures

Abstract

Soils are often mixture composed of coarse and fine particles which are intricate inhomogeneous material and occur with widely varying characteristicsin nature The main objective of this study is to investigate the effect of fine content on unconfined compression strength of clayey soils and shear resistance offered throught angle of internal frication, in case of sands. Tests were conducted with varying percentage of fines(10,20.40,60%) in soil samples. The individual constituents in soil composition have different mechanical and physical properties and interact differently under the influence of external and internal loads,and the relation between coarse and fine particles is difficult to differentiate.once more the high-quality content material in coarse soil are cautiously taken into consideration because they decide the composition and kind of soil and affect sure soil residences together with permeability, particle friction and brotherly love.In this study, laboratory tests were conducted to investigate the deformation of soil. A series of direct shear tests were carried out under same weight of sample and density with fine, reducing percentage of fine in sand with different gradation properties. A series of unconfined compressive strength tests were carried out under same weight, optimum moisture content and dry density in order to assess the effect of increasing percentage of fine in clayey soil. The angle of internal friction is found to decrease with increasing percentage of fine in sands and the unconfined compressive strength is found to increase with increasing percentage of fine particles in clayey soil.

Keywords: Atterberg’slimits, Unconfined Compression test, Direct shear testspecific gravity and sieve analysis.