Evaluation of Bentonite Mixed Indigenous Clays for Development of Clay Liners
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This study presents experimental investigation of indigenous clays mixed with Bentonite to assess their suitability in potential use as clay liners. Soil samples with 0, 4, 8, and 12% Bentonite content from three different sites in Peshawar region were tested for various geotechnical properties. Grain size distribution, specific gravity, Atterberg limits and free swell were found through laboratory tests using appropriate ASTM procedures. Maximum dry density and optimum moisture content were calculated using Atterberg limits in available relationships. Finally, one dimensional consolidation tests were conducted to find relevant parameters for calculating hydraulic conductivity. A decrease in specific gravity, increase in free swell, and in optimum moisture content, decline in maximum dry density and hydraulic conductivity was observed with increase in Bentonite content across all three soil samples. During free swell, the soil clusters become larger leading to formation of floccules resulting in the narrowing of inter-particle space and thus blocking of permeable paths. It is concluded that 8% Bentonite content by weight yields a suitable mixture for a clay liner that has hydraulic conductivity in the range of recommended limits.
[2] Sánchez-Triana, Ernesto, Santiago Enriquez, Javaid Afzal, Akiko Nakawaga, and Asif Shuja Khan. "Air Pollution in Pakistan.” Cleaning Pakistan's Air: Policy Options to Address the Cost of Outdoor Air Pollution (June 26, 2014): 57–81. doi:10.1596/978-1-4648-0235-5_ch2.
[3] Jones, D, and N Dixon. "Landfill Lining Stability and Integrity: The Role of Waste Settlement.” Geotextiles and Geomembranes 23, no. 1 (February 2005): 27–53. doi:10.1016/j.geotexmem.2004.08.001.
[4] Al Raisi, Sumaiya Abdul Hameed, Hameed Sulaiman, Fakhr Eldin Suliman, and Osman Abdallah. "Assessment of heavy metals in leachate of an unlined landfill in the Sultanate of Oman." International Journal of Environmental Science and Development 5, no. 1 (2014): 60.
[5] Kerry Rowe, R. "Systems Engineering The Design and Operation of Municipal Solid Waste Landfills To Minimize Contamination of Ground Water.” Advances in Environmental Geotechnics (2010): 3–18. doi:10.1007/978-3-642-04460-1_1.
[6] Bostwick, L.E., Laboratory Study Of Geosynthetic Clay Liner Shrinkage When Subjected To Wet/Dry Cycles, in Department of Civil Engineering. 2009, Queen's University: Kingston, Ontario, Canada.
[7] Met, Ä°., H. Akgün, and A. G. Türkmenoğlu. "Environmental Geological and Geotechnical Investigations Related to the Potential Use of Ankara Clay as a Compacted Landfill Liner Material, Turkey.” Environmental Geology 47, no. 2 (September 25, 2004): 225–236. doi:10.1007/s00254-004-1147-4.
[8] Daniel, D.E., Geotechnical Practice for Waste Disposal [electronic resource]. 1993, Boston, MA: Springer US: Imprint: Springer.
[9] Cheng, Tao, Yi Zhang, and Keqin Yan. "Experimental Study of Silty Clay Plane Strain Tri-Axial Test Under RTC Path and Modified Cam-Clay Model.” Civil Engineering Journal 4, no. 3 (April 7, 2018): 518. doi:10.28991/cej-0309112.
[10] Cho, W. J., J. O. Lee, K. S. Chun, and D. S. Hahn. "Basic physicochemical and mechanical properties of domestic bentonite for use as a buffer material in a high-level radioactive waste repository." Journal-Korean Nuclear Society 31, no. 6/SUPP (1999): 39-50.
[11] Memon, Shazim Ali, Rao Arsalan, Sardar Khan, and Tommy Yiu Lo. "Utilization of Pakistani Bentonite as Partial Replacement of Cement in Concrete.” Construction and Building Materials 30 (May 2012): 237–242. doi:10.1016/j.conbuildmat.2011.11.021.
[12] Mirza, J., M. Riaz, A. Naseer, F. Rehman, A.N. Khan, and Q. Ali. "Pakistani Bentonite in Mortars and Concrete as Low Cost Construction Material.” Applied Clay Science 45, no. 4 (August 2009): 220–226. doi:10.1016/j.clay.2009.06.011.
[13] EPA, U.S., Geosynthetic Clay Liners Used in Municipal Solid Waste Landfills, in Solid Waste and Emergency Response. 2001: USA.
[14] Stewart, D.I., P.G. Studds, and T.W. Cousens. "The Factors Controlling the Engineering Properties of Bentonite-Enhanced Sand.” Applied Clay Science 23, no. 1–4 (August 2003): 97–110. doi:10.1016/s0169-1317(03)00092-9.
[15] Dixon, Neil, Edward John Murray, and D. R. V. Jones, eds. Geotechnical Engineering of Landfills: Proceedings of the Symposium Held at the Nottingham Trent University Department of Civil and Structural Engineering on 24 September 1998. Thomas Telford, (1998).
[16] Jo, Won-Jin, Jae-Wan Lee, and Cheol-Hyeong Gang. "Research Papers: Hydraulic Conductivity of Compacted Soil - Bentonite Mixture for a Liner Material in Landfill Facilities.” Environmental Engineering Research 7, no. 3 (September 30, 2002): 121–127. doi:10.4491/eer.2002.7.3.121.
[17] O'Sullivan, Declan, and Paul Quigley. "Geotechnical engineering and environmental aspects of clay liners for landfill projects." Fehily Timoney & Co. and Irish Geotechnical Services Ltd. Institution of Engineers of Ireland (2002).
[18] Brown, Teresa Jane, T. Bide, S. D. Hannis, N. E. Idoine, L. E. Hetherington, R. A. Shaw, A. S. Walters, P. A. J. Lusty, and R. Kendall. "World Mineral Production 2004-2008.” British Geological Survey, (2010).
[19] Bagchi, Amalendu. "Design of landfills and integrated solid waste management.” John Wiley & Sons, (2004).
[20] H. Khan, I. and N. Ahsan, Textbook of Solid Wastes Management. (2014): CBS Publisher & Distributors P Ltd.
[21] Head, Kenneth H., and Roger J. Epps. "Manual of soil laboratory testing.” Vol. 1, no. 2. London: Pentech Press, (1980).
[22] Bell, Fred. Engineering treatment of soils. CRC Press, (1993).
[23] Schmitz, Robrecht M, Christian Schroeder, and Robert Charlier. "Chemo–mechanical Interactions in Clay: a Correlation Between Clay Mineralogy and Atterberg Limits.” Applied Clay Science 26, no. 1–4 (August 2004): 351–358. doi:10.1016/j.clay.2003.12.015.
[24] Tang, Qiang, Takeshi Katsumi, Toru Inui, and Zhenze Li. "Influence of pH on the Membrane Behavior of Bentonite Amended Fukakusa Clay.” Separation and Purification Technology 141 (February 2015): 132–142. doi:10.1016/j.seppur.2014.11.035.
[25] Das, Braja M. Advanced soil mechanics. CRC Press, (2019).
[26] Al-Khafaji, A. N. "Estimation of Soil Compaction Parameters by Means of Atterberg Limits.” Quarterly Journal of Engineering Geology and Hydrogeology 26, no. 4 (November 1993): 359–368. doi:10.1144/gsl.qjegh.1993.026.004.10.
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