Effect of bentonite on the saturated hydraulic conductivity of landfill liners based on dune sand

Mohamed Kamel Gueddouda, Idriss Goual, Said Taibi, Nabil Aboubekr, Mohamed Lamara



Sand-bentonite (SB) mixtures have been used successfully for construction of hydraulic barriers when clayey soils are not available. Compacted layers of SB mixtures have been proposed and used in a variety of geotechnical structures as engineered barriers for the enhancement of impervious landfill liners. In the practice we will try to get an economical mixture that satisfies the hydraulic and mechanical requirements.
The effects of the bentonite additions are reflected in lower water permeability, and acceptable shear strength. In order to get an adequate dune sand bentonite mixtures, an investigation relative to the hydraulic and mechanical behavior is carried out in this study for different mixtures. According to the results obtained, the adequate percentage of bentonite should be between 12% and 15 %, which result in a hydraulic conductivity less than 10E–6 cm/s, and good shear strength.

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ADEME (1999). Storage facilities for household and assimilated wastes. Techniques et Recommandations, ADEME Editions, Paris, 106p. (In French)

Alston C, Daniel DE and Devroy DJ (1997). Design and construction of sand Bentonite liner for effluent treatment lagoon, Marathon, Ontario. Canadian geotechnical journal, 34(6), 841-852.

Chapuis RP (1990). Sand-bentonite liners: predicting permeability from laboratory tests. Canadian Geotechnical Journal, 27(1), 47-57.

Kenney TC, Veen WV, Swallow MA, & Sungaila MA (1992). Hydraulic conductivity of compacted bentonite-sand mixtures. Canadian Geotechnical Journal, 29(3), 364-374.

Olson RE (1986). Sate of art: Consolidation theory, consolidation of soils: testing and evaluation. Yang RN and Townsend FC (Eds), ASTM, STP 892, 7-70.

Olson RE, & Daniel DE (1981). Measurement of the hydraulic conductivity of fine-grained soils. Permeability and groundwater contaminant transport, ASTM STP, 746, 18-64.

Parker RJ, Bateman S & Williams D (1993). Design and management of landfills. Geotechnical management of waste and contamination, Fell, Phillips & Gerard (eds), Balkema, Rotterdam, 209-252.

Sayad-Gaidi, C. (2003). Flow in saturated and unsaturated low permeability porous media. Doctoral dissertation, École Centrale de Paris, France. (In French)

Serratrice JF & Soyez B (1996). The swelling tests. Bulletin des laboratoires des ponts et chaussées, 204, ref .4082, 65-85. (In French)

Skempton AW (1953). The colloidal activity of clays. Proceedings of the Third International Conferences on Soil Mechanics and Foundations Engineering, 1, 57-61.

Souli H, Fleureau JM, Trabelsi Ayadi M & Besnard M (2008). Physicochemical analysis of permeability changes in the presence of zinc. Geoderma, 145(1), 1-7.

Wu JY & Khera RP (1990). Properties of a Treated-Bentonite/Sand Mix in Contaminant Environment. Physic-Chemical Aspects of Soil and Related Materials. ASTM STP, 1095, 47-59.

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