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- W3184665611 abstract "The self-healing of five geosynthetic clay liners (GCLs) with laboratory simulated down-slope erosion defects (quasi-circular holes and linear slits where there is little or no bentonite) upon hydration from Godfrey silty sand subgrade with w fdn = 16% under an overburden stress σ v = 20 and 100 kPa is examined. While there was an up to 9.6 mm reduction in hole diameter/slit width, none of the defects fully self-healed. The self-healing of these laboratory eroded specimens with a swell index of 10.2 ± 1.7 ml/2 g after hydration is generally smaller than that of the corresponding virgin GCLs. GCLs with powdered bentonite with an initial SI of 32 ml/2 g generally self-healed better and the intact specimens had a lower hydraulic conductivity than GCLs with granular bentonite with an initial SI of 24–26 ml/2 g. Higher mass per unit area of bentonite and overburden stress led to better self-healing. Ponding of distilled (DI) water above the GCL increased self-healing of GCL slightly more than simulated synthetic landfill leachate (SSL). The post-hydration hydraulic conductivity, k, of GCL specimens with holes/slits is shown to be about 1–3 orders of magnitude higher than that of the intact GCL specimen." @default.
- W3184665611 created "2021-08-02" @default.
- W3184665611 creator A5068555270 @default.
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- W3184665611 date "2022-02-01" @default.
- W3184665611 modified "2023-09-30" @default.
- W3184665611 title "Self-healing of laboratory eroded defects in a GCL on silty sand" @default.
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- W3184665611 doi "https://doi.org/10.1680/jgein.21.00023" @default.
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