The effects of sand quantity in high plasticity clay to the shearing stress

Keywords: Clay, shearing resistance, cohesion, angle of internal friction, shearbox test, triaxial compression test. The parameters of shearing resistance of soils, while the projects with about geotechcinal engineering, has extremly consequence. Shearing stres of soil is defined the biggest shearing stres that withstand without yield resistance. n orderto define shering resistance in a soil, angle of shearinh resistance and cohesion values are find with laboratory and in-sute test. n this study, the changing of shearing parameters with increasing sand quantity in high plasticity clay has been defined. Fine sand, coarse sand and medium are used in this study. High plasticity clay, fine sand, medium sand and coarse sand is used for tests, 10%, 25%, 50%, 75% percent of proportion for the clay, the sand is mixed to the prepared samples and optimum moisture content with standart compaction tests are find. Found optimum moisture content, the samples to be found with standart compaction test is compacted and the tese samples are ensured for the usu of triaxial compression test and shearbox tests and the tests are realized. When finished all the tests until the 25% percent of fine sand puantity in high plasticty clay, ohesion ualues have increased in triaxial compression tests and sherbox tests. f sand quantity continues to increased, it shows that quantity of percentage of cohesion is quidty decreased. This similar result is seen when the experimen with when used medium and coarse sand. Angle of internal friction than one of shearing patameters, there is no commnet to look at the resultsof experiment for triaxial compression tests. f you look at the shearbox tests results 25% of fine sand das CH samples; angle of internal friction value decreases and if sand percentage keep continue to increases internal friction increased.