Stabilization of soil using waste paper sludge and cement kiln dust
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Date
2019-05
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G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
The globally growing rate of urbanization and industrialization results in the towering collection of industrial wastes. India is one of the largest producers of Cement and Paper with an annual production of 285.83 million tons and 13 million tons respectively. The disposal and storage of by-products generated from these industries is a big challenge as they cause serious environmental issues. Besides an immense need of effective, economical and environment friendly disposal of these industrial wastes, it is necessary to explore new areas and methods of
their utilization in construction, soil stabilization etc. in order to minimize these environmental threats. Increase in global demand for economical and good quality of construction materials constrain engineers to make use of stabilization techniques on the locally available weak soil so as to curtail down the cost of project which could have aroused due to excavation and replacement of inferior soil. Solution to the above problem is to find a material which not only curtail down the cost of traditional stabilizing agents but also it should be easily and abundantly available. Therefore, the present study is an attempt to explore the constructive use of Waste Paper Sludge (WPS) and Cement Kiln Dust (CKD) in stabilization of soils. The overall study was conducted in three phases. In the first phase, the geotechnical characteristics of local soil were studied. In the second phase, geotechnical properties of local soil mixed with five different percentages of WPS as 2%, 4%, 6%, 8% and 10% by dry weight of soil were determined by conducting a series of standard proctor tests, unsoaked and soaked CBR tests and UCS tests. In third phase, WPS treated soil samples were mixed with different percentage of CKD varying as 5%, 10% and 15% and modification in the above stated geotechnical properties of soil was investigated. Local soil was classified as CL according to ISSCS. From the standard compaction test it was concluded that with the addition of WPS and CKD, moisture demand of soil got increased while maximum dry density (MDD) got reduced
with the introduction of both the additives. Soaked CBR values of virgin soil remarkably improved with the introduction of WPS and CKD. Also, there was a gain in compressive strength with the introduction of CKD into WPS treated soil mix. Lastly, the results indicates that the geotechnical properties of problematic soil from Sitarganj can be effectively improved by using 6% of WPS in combination 10% of CKD by dry weight of the soil.
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