Laboratory investigation of self-healing properties on geosynthetic clay liners with flaw

• Autorzy: Zhang G.-W. , Zhang H.-Y. , Wang J.-F. , Zhou L. , Liu P. , Jiang X.

Identyfikatory

DOI

10.1515/aep-2015-0007

• Języki publikacji: EN

Abstrakty

EN

The objective of this paper is to evaluate the self- healing properties of a commercially-available geosynthetic clay liner (GCL) using flexible-wall permeameter. The GCLs are produced by the same factory, but the contents of bentonite are different. Also the hydraulic conductivities (HC) of GCLs with no defect are different. In this study, specimens were completely saturated under the backpressure of 20 kPa before the test. Permeability tests were performed on GCL specimens with penet rating flaw and also on specimens permeated with distilled water and CaCl2 solutions. The test results were presented and discussed. Experimental results showed that the GCL with penetrating flaw did not exhibit complete self-healing in the case of flaw. After 120 days, the hydraulic conductivity increased by approximately an order of magnitude. In addition, CaCl2 solutions had a significant influence on the hydraulic conductivity. The research findings might be of interest to researchers and engineers who design liners for landfills and other liquid containment facilities.

Słowa kluczowe

EN

landfills; geosynthetic clay liner; self healing; hydraulic conductivity

• Wydawca: Institute of Environmental Engineering, Polish Academy of Sciences
• Czasopismo: Archives of Environmental Protection
• Rocznik: 2015
• Tom: Vol. 41, no. 1
• Strony: 53--58
• Opis fizyczny: Bibliogr. 15 poz., rys., wykr.

Twórcy

autor

Zhang G.-W.

• Lanzhou University, China Key Laboratory of Mechanics on Disaster and Environment in Western China
• PetroChina Research Institute of Exploration & Development-Northwest, China

autor

Zhang H.-Y.

• Lanzhou University, China Key Laboratory of Mechanics on Disaster and Environment in Western China

autor

Wang J.-F.

• Lanz hou University, China Key Laboratory of Western China’s Environmental Systems

autor

Zhou L.

• Lanzhou University, China Key Laboratory of Mechanics on Disaster and Environment in Western China

autor

Liu P.

• Lanzhou University, China Key Laboratory of Mechanics on Disaster and Environment in Western China

autor

Jiang X.

• Lanzhou University, China Key Laboratory of Mechanics on Disaster and Environment in Western China

Bibliografia

• [1] Benson, C. & Meer, S. (2009). Relative abundance of monovalent and divalent cations and the impact of desiccation on geosynthetic clay liners, Journal of Geotechnical and Geoenvironmental Engineering, 135, 3, pp. 349-358.
• [2] Benson, C., Thorstad, P., Jo, H. & Rock, S. (2007). Hydraulic performance of geosynthetic clay liners in a landfill final cover, Journal of Geotechnical and Geoenvironmental Engineering, 133, 7, pp. 814-827.
• [3] Egloefstein, T. (2001). Natural bentonites-influence of the ion exchange and partial desiccation on permeability and self-healing capacity of bentonites used in GCLs, Geotextiles and Geomembranes, 19, 7, pp. 427-444.
• [4] Gleason, M., Daniel, D. & Eykholt, G. (1997). Calcium and sodium bentonite for hydraulic containment applications, Journal of Geotechnical and Geoenvironmental Engineering, 123, 5, pp. 438-445.
• [5] Hewitt, R. & Daniel, D. (1997). Hydraulic conductivity of geosynthetic clay liners after freeze-thaw, Journal of Geotechnical and Geoenvironmental Engineering, 123, 4, pp. 305-313.
• [6] Jo, H., Benson, C., Shackelford, C., Lee, J. & Edil, T. (2005). Long-term hydraulic conductivity of a geosynthetic clay liner permeated with inorganic salt solutions, Journal of Geotechnical and Geoenvironmental Engineering, 131, 4, pp. 405-417.
• [7] Kraus, J., Benson, C., Erickson, A. & Chamberlain, E. (1997). Freeze-thaw cycling and hydraulic conductivity of bentonitic barriers, Journal of Geotechnical and Geoenvironmental Engineering, 123, 3, pp. 229-238.
• [8] Lee, J. & Shackelford, C. (2005). Impact of bentonite quality on hydraulic conductivity of geosynthetic clay liners, Journal of Geotechnical and Geoenvironmental Engineering, 131, 1, pp. 64-77.
• [9] Malusis, M. A. & Scalia, J. (2007). Hydraulic conductivity of an activated carbon-amended geosynthetic clay liner, Geoenvironmental Engineering, 163, pp. 1-13.
• [10] Petrov, R., Rowe, R. & Quigley, R. (1997). Selected factors influencing GCL hydraulic conductivity, Journal of Geotechnical and Geoenvironmental Engineering, 123, 8, pp. 683-695
• [11] Podgorney, R. & Bennett, J. (2006). Evaluating the long-term performance of geosynthetic clay liners exposed to freeze-thaw, Journal of Geotechnical and Geoenvironmental Engineering, 132, 2, pp. 265-268.
• [12] Rowe, R., Mukunoki, T. & Sangam, H. (2005). Benz ene, toluene, ethylbenzene, m&p-xylene, o-xylene diffusion and sorption for a geosynthetic clay liner at two temperatures, Journal of Geotechnical and Geoenvironmental Engineering, 131, 10, pp. 1211-1221.
• [13] Rowe, R.K. (2005). Long-term performance of contaminant barrier system, Geotechnique, 55, 9, pp. 631-678.
• [14] Shackelford, C., Benson, C., Katsumi, T., Edil, T. & Lin, L. (2000). Evaluation of the hydraulic conductivity of GCLs permeated with non-standard liquids, Geotextiles and Geomembranes, 18, 2-4, pp. 133-161.
• [15] Sivakumar, G. L., Sporer, H., Zanzinger, H. & Gartung, E. (2001). Self-healing properties of geosynthetic clay liners, Geosynthetics International, 8, 5, pp. 461-470