Improving hydraulic performance and durability of sandwich clay liner using super-absorbent polymer

Abstract

The hydraulic performance and durability of geosynthetic clay liner containing various amounts of sodium polyacrylate polymer are experimentally studied. Sodium polyacrylate, generally known as a super-absorbent polymer, is a polymeric material with a potential of high water absorbance due to its chemical structure. In this study, sodium polyacrylate powder is used as a partial replacement of bentonite as much as 3%, 5% and 7% by the weight of bentonite. For comparison, the hydraulic performance of geosynthetic clay liner without super-absorbent polymer is also experimented. Atterberg limits, free swell index, hydraulic conductivity, self-healing capacity and wet/dry cycle tests are conducted in order to assess how super-absorbent polymer can affect the performance of geosynthetic clay liners as landfill liners and covers. The results show that the hydraulic conductivity and self-healing capacity of geosynthetic clay liner are relatively enhanced by super-absorbent polymer inclusion. The results of wet/dry cycle test show that using super-absorbent polymer as a partial replacement of bentonite considerably improves the durability of geosynthetic clay liner against wet/dry cycles. Geosynthetic clay liner containing super-absorbent polymer shows a negligible increase in hydraulic conductivity while there is a noticeable increase in hydraulic conductivity of specimen without super-absorbent polymer after 10 cycles of wetting and drying.

Keywords

Sandwich geosynthetic clay liner super-absorbent polymer hydraulic performance self-healing capacity wet/dry durability

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References

Loizidou

Kapetanios

. Effect of leachate from landfills on underground water quality. Sci Total Environ 1993; 128: 69–81.

Van der Broek E and Kirov NY. The characterization of municipal solid wastes. In: Kirov NY (ed.) Proceedings of Australian waste disposal conference, Sydney, Australia, 17–19 February 1972, pp.23–29. Ann Arbor Science Publishers.

Kapetanios EG. Study on the production of composts from refuse: their evaluation and the use of clinoptilolite for the heavy metal removal. PhD Thesis, Athens National Technical University, Greece, 1990.

Burrows

Rowe

. Ether soluble constituents of landfill leachate. J Water Pollut Control Fed 1975; 47: 921–923.

Grygorczuk-Petersons

Waiter

. Effect of sealed municipal waste landfill on the quality of underground water. J Ecol Eng 2016; 17: 123–130.

Jermolowicz P. Principles for designing the sealing layers with the use of geomembranes in landfill, pond and reservoirs type facilities. www.kup.piib.org.pl/tl_files/izba/dokumenty/szkolenia (accessed 24 April 2017).

Sakiewicz

Nowosielski

Pilarczyk

et al.

Selected properties of the halloysite as a component of Geosynthetic Clay Liners (GCL). J Achiev Mater Manuf Eng 2011; 48: 177–191.

Dickinson

Brachman

RWI

. Deformations of a geosynthetic clay liner beneath a geomembrane wrinkle and coarse gravel. Geotext Geomembr 2006; 24: 285–298.

Lin

Benson

. Effect of wet-dry cycling on swelling and hydraulic conductivity of GCLs. J Geotech Geoenviron Eng 2000; 126: 40–49.

10.

Estronell

Daniel

. Hydraulic conductivity of three geosynthetic clay liners. J Geotech Eng 1992; 118: 1592–1606.

11.

Andal

Chandrasekhar

Viswanadh

. Hydraulic conductivity of GCL with bentonite-silica fume matrix. J Urban Environ Eng 2012; 6: 109–112.

12.

Egloffstein

. Geosynthetic clay liners: ion exchange. Geosynth Fabrics 1997; 15: 38–43.

13.

Bouazza

Vangpaisal

Jefferis

. Effect of wet-dry cycles and cation exchange on gas permeability of geosynthetic clay liners. J Geotech Geoenviron Eng 2006; 132: 1011–1018.

14.

Hayer D. Basic examination on the efficiency of GCLs. In: Koerner RM, Gartung E, Zanzinger H and Balkema AA (eds) Proceedings of international symposium on Geosynthetic Clay Liners, Nurnberg, Germany, 1995, pp.101–111. Rotterdam.

15.

Sari K. Investigation on self-healing capacity of geosynthetic clay liner. PhD Thesis, Saga University, Japan, 2013.

16.

Melchior S. In situ studies on the performance of landfill caps. In: Proceedings of international containment technology conference, 9–12 February, Fl, US, 1997, pp.365–373. US: U.S. Department of Energy.

17.

Benson

Edil

. Hydraulic conductivity and cation exchange in nonprehydrated and prehydrated bentonite permeated with weak inorganic salt solutions. Clays Clay Miner 2004; 52: 661–679.

18.

Horie

Baron

Fox

et al.

Definitions of terms relating to reactions of polymers and to functional polymeric materials. Pure Appl Chem 2004; 76: 889–906.

19.

Leciejewski

. The effect of hydrogel additives on the water retention curve of sandy soil from forest nursery in Julienk. J Water Land Dev 2009; 13: 239–247.

20.

Bai

Zhang

Liu

et al.

Effect of super-absorbent polymers on the physical and chemical properties of soil following different wetting and drying cycles. Soil Use Manage 2010; 26: 253–260.

21.

Vijayakshmi

Nemichandrappa

Reedy

et al.

Effect of polymers on moisture retention and soil water holding capacity. Karnataka J Agric Sci 2012; 25: 469–471.

22.

Yilmaz

. Relationships between liquid limit, cation exchange capacity and swelling potentials of clayey soils. Eurasian Soil Sci 2004; 37: 506–512.

23.

ASTM D4318. Standard test methods for liquid limit, plastic limits and plasticity index of soils.

24.

ASTM D5890. Standard test method for swell index of clay mineral component of geosynthetic clay liners.

25.

Sari

Chai

. Self healing capacity of geosynthetic clay liners and influencing factors. Geotext Geomembr 2013; 41: 64–71.