Abstract The interface transmissivity (θ) of two multicomponent geosynthetic clay liners (GCLs) is investigated upon hydration and permeation with a highly saline solution (TDS ≈ 260,000 mg/l; Na+ ~ 95,000 mg/l; K+~12,000 mg/l) at two stress levels (10 kPa and 150 kPa). One GCL had a smooth 0.2 mm-thick coating whereas the second GCL had a textured 1 mm-thick coating. For both GCLs, the interface transmissivity after 2-weeks is shown to be higher than at steady-state. The lower the geomembrane's (GMB) stiffness, the lower interface transmissivity. However, the effect is generally diminished at steady state and higher stress. The effect of GMB stiffness at 10 kPa is shown to be 1.6-times that at 150 kPa. Similarly, the 2-week and steady state interface transmissivity for the textured GMB was higher at 10 kPa than at 150 kPa. Coating texture and coating orientation are shown to have a significant effect on GMB/multicomponent GCL interface transmissivity. A hole in the coating aligned with GMB hole creates an additional flow path at the coating/GCL interface (θGeofilm/GCL), however most of the flow occurs at the coating/GMB interface (θGeofilm/GMB).

中文翻译：

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多组分 GCL 在高盐度蓄水应用中的性能

摘要 在高盐水溶液（TDS ≈ 260,000 mg/l；Na+ ~ 95,000 mg/l；K+~12,000 mg/l）的水化和渗透过程中，研究了两种多组分土工合成粘土衬垫 (GCL) 的界面透射率 (θ)。两个应力水平（10 kPa 和 150 kPa）。一个 GCL 具有 0.2 毫米厚的光滑涂层，而第二个 GCL 具有 1 毫米厚的纹理涂层。对于这两种 GCL，2 周后的界面透射率显示高于稳态。土工膜 (GMB) 刚度越低，界面透射率越低。然而，在稳定状态和更高的压力下，效果通常会减弱。GMB 刚度在 10 kPa 时的影响显示为 150 kPa 时的 1.6 倍。同样，纹理 GMB 的 2 周和稳态界面透射率在 10 kPa 时高于 150 kPa。涂层质地和涂层取向对 GMB/多组分 GCL 界面透射率有显着影响。涂层中与 GMB 孔对齐的孔会在涂层/GCL 界面 (θGeofilm/GCL) 处产生额外的流动路径，但大部分流动发生在涂层/GMB 界面 (θGeofilm/GMB)。