EFFECT OF LIME AND LEAF ASH ON GEOTECHNICAL PROPERTIES OF RED MUD by Pawandeep Kaur
Abstract
Red mud is a waste material which is produced from National Aluminium Company Limited Red mud produced approximately 76 million tons every year. Disposal and storage of large quantity of red mud is a serious problem which occurs all across the world. Leaf ash which is also a waste material produced globally, and the use of leaf ash in red mud is also an efficient way to dispose leaf ash. In this study, leaf ash and lime were used as an admixtures to improve the geotechnical properties of red mud. The red mud was taken from National Aluminium Company Limited ,Odisha, and leaf ash was locally collected. The aim of present study is to investigate the effect of lime and leaf ash on geotechnical properties of red mud. To achieve the aim, various tests were conducted on red mud such as specific gravity, atterberg limit, standard proctor test, CBR test, UCS test. Leaf ash was added in proportion of 2%,4%,6%,8% and 10% where as lime was added in proportion of 5% to 15%. All CBR mould was placed in water for 4 days for soaking and then placed in moist environment for 3 days curing, then test were conducted, and UCS tests were also carried out on different proportions of leaf ash and lime added to the soil. Maximum UCS value increases by 118.8% when 10% lime with 8% leaf ash added to the soil and CBR value increases from 12.5% to 16.5 % with addition of 10 % lime and 8% leaf ash. Optimized value of lime was decided from the CBR test of red mud mixed with different proportion of lime.
