The production of sugarcane bagasse ash (SBA), glass fiber (GF) and ceramic dust (CD) in developing countries at very large scale usually poses a severe disposal problem. The purpose of this research is to determine whether these three waste products are suitable for improving the engineering characteristics of expanding soil. The study has been carried out by varying the content of SBA (0-20%), CD (0-20%) and GF (0-4%) in black cotton soil. Optimization was carried out to find out the composition of the ideal quaternary blend. The use of these materials was found to decrease the maximum dry density and swelling of soil with increase in optimum moisture content. In addition, the liquid limit was found to decline with increment in CBR and unconfined compressive strength. The study confirms the use of these waste materials as soil stabilizers in addition to provide a solution for waste reuse.
During any construction on soil surface such as construction of road and airport pavements, compaction of the soil is required and soil stabilization plays a vital role. Various characteristics of soil should be optimized with different factors. Expansive soil has property of swelling when moisture content increases and shrinking when water gets evaporated. Rice husk is a major agricultural waste that is easily available in in India and is generally burnt to get rice husk ash (RHA). This study has been aimed to get dual benefit, first to stabilize expansive soil by addition of RHA and second to effectively utilize RHA, the agricultural waste. It has been observed that at 12% RHA in presence of 5% cement can be effectively used to improve plasticity of soil and CBR value resulting in effective soil stabilization. Thus, the research demonstrates that agricultural waste has efficient use in soil stabilization.
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