DETERMINATION OF THE EFFECT OF EGG SHELL POWDER AND LIME STABILIZATION ON ENGINEERING PROPERTIES OF CLAY SOIL

JEREMIAH UGONNA NWALI (NAU/2016224083)

Abstract


Improvement of soil properties is necessary in the modern scenario as soils with the requiredproperties are not readily available for construction activities. There have been a lot of issuesreported when structures were constructed on weak and soft soils like problems of shear failure,excessive settlement, differential settlement etc. The alternatives left with us are making the soilat site suitable for the expected load by improving its properties. Eggshell Powder (ESP) has notbeen used as a stabilizing material; however, it could be a supplement for industrial lime. Thisstudy was meant to study the effect of eggshell powder on the stabilizing potential of lime on anexpansive clay soil. Tests were carried out to determine the optimal quantity of lime and theoptimal percentage of lime-ESP combination; the optimal quantity of lime was graduallyreplaced with suitable amount of eggshell powder. The lime stabilized and lime-ESP stabilizedmixtures were subjected to engineering tests. The optimal percentage of lime-ESP combinationwas attained at a 4% ESP + 3% lime, which served as a control. Results of the Maximum DryDensity (MDD), California Bearing Ratio (CBR), unconfined compression test and Undrainedtriaxial shear strength test all indicated that lime stabilization at 7% is better than thecombination of 4% ESP + 3% lime

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