AN INVESTIGATION ON THE EFFICIENCY OF LIME AND SILICA FUME TREATED MARINE CLAY AS SUBGRADE IN FLEXIBLE PAVEMENTS

Dr. D Koteswara Rao
Professor of Civil Engineering& University College of Engineering Kakinada, JNTUK Kakinada, Andhra Pradesh, India. , IN

M. Siva Srinu
Professor of Civil Engineering& University College of Engineering Kakinada, JNTUK Kakinada, Andhra Pradesh, India. , IN

Keywords: Marine Clay, Silica Fume, Lime, OMC, MDD, CBR, Atterberg Limits, Grain Size distribution.

Abstract

Marine clay is highly deformable soil in nature, available along the coastal corridor. Marine clays are highly deformable and possess moderate swelling behavior. Marine clays are moderate in expansive nature due to the presence of chlorite, illite, kaolinite. The natural water content of the marine clay is always greater than its liquid limit. The properties of marine clay differ significantly in moist and dry conditions. Due to the poor engineering characteristics of these marine clay soil deposits causes several problems in pavement design and has potential to destroy foundations of buildings. These problems are due to its soil moisture, reducing soil moisture is the best thing to reduce the damages that are caused due to marine clay. Marine clays are fully saturated, soft and sensitive which possess low density and low shear strength due to which they are consolidated over a period of time. The present study deals with the experimental work on the efficiency of Lime and Silica Fume treated Marine Clay as subgrade in flexible pavements.

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