Improvement of Subgrade CBR Value by Waste Product using Sugar Cane Bagasse Ash(SCBA) From Sugar Industry Can be used as Stabilizing Material for Natural Soils

In many situations, soils in natural state do not present adequate soil properties to be used as pavement (road) service layers. In order to improvement their geotechnical parameters to meet the requirements of technical specifications of construction industry; soil stabilized techniques are normally emphasized. The objective of this work is to utilize the effectiveness of Bagasse Ash (BA) material to enhance the properties of natural soil (NS) used for materials in pavement sub grade. The experimental work involved index properties to classify the soil sample. The preliminary investigation of the natural soil shows that it is belongs to A-6 class in the AASHTO soil classification system. Whereas as per IS classification this class are generally low compressibility clay soil (CL). Liquid limit, plastic limit, plasticity index, OMC, MDD, swelling pressure and CBR tests were used to evaluate properties of stabilized soil. The natural soil was stabilized with BA in stepped concentration of 5%, 10%, 15%, 20%, 25% and 30% by dry weight of the soil individually. All stabilized artificial soil samples were also cured for 96 hours for CBR test in fully saturated condition. The test results indicate that the addition of BA enhances the percentage of partial size distribution, but with addition of BA till 20% the L.L, PL, PI and swelling pressure decreases, while these parameters further increases in this limit beyond i.e. 20% to 30% of BA, Specific Gravity and MDD decrease with addition of BA, for all percentage values, whereas optimum moisture content increases in each material. The CBR value increases with addition of BA till 20%, the CBR value increases and it is decreases with further addition of BA beyond 20% to 30% for both condition (soaked and Unsoaked)