Polymer treated clays subjected to wet-dry cycling with seawater
(2014) 7th International Congress on Environmental Geotechnics (ICEG 2014) — Location: Melbourne (10.November.2014)
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- Abstract
- Free swell in oedometers and hydraulic conductivity tests were conducted to assess how wet-dry cycling affects swell and the hydraulic conductivity of geosynthetic clay liners (GCLs). Similar tests were performed on clays treated with 2% and 8% of polymers to compare their efficiency after wet and dry cycles using deionized water and seawater. Swelling of the untreated clay decreased sharply after two wetting cycles with salt solution and cracks were noticed since the second dry. The amended clays showed good swelling capacity after three cycles, presenting fine cracks only during the third dry. The hydraulic conductivity of the untreated specimens, once permeated with seawater, increased dramatically in respect of the treated bentonite. The permeability increased because cracks formed during desiccation did not fully heal after rehydration.
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Citations
De Camillis, M., Di Emidio, G., Verástegui Flores, R. D., & Bezuijen, A. (2014). Polymer treated clays subjected to wet-dry cycling with seawater. Proceedings of 7th International Congress on Environmental Geotechnics, p. 1002-1008. https://hdl.handle.net/2078.5/230031