The self-healing capacities of a GCL with natural bentonite (NB) as core (NB-GCL) and a GCL with a polymerized bentonite (PB) as core (PB-GCL) were investigated under simulated field conditions, i.e. geomembrane-GCL-a clayey subsoil layer composite liner system with a damage hole on the geomembrane and the GCL. The clayey subsoils tested had initial water contents of 22.2% and 26.8%. The liquids used were deionized (DI) water and 0.3 M NaCl solution. The test results indicate that for both the PB-GCL and NB-GCL only hydrated on the subsoils for 1–3 months, a damage hole of 15 mm in diameter was almost not self-healed. For cases of applying a constant liquid head on the top of the geomembrane of 100 mm, the sizes of damage holes were self-healed in term of diameter is about half of the values reported in the literature for tests with plenty liquid supply to the damaged GCLs. Further, for the conditions tested and for the cases self-healed, DI water leaked into the subsoil was less than about 60 g, and 0.3 M NaCl solution leaked was less than 150 g.

在模拟现场条件下研究了以天然膨润土（NB）为核心的GCL（NB-GCL）和以聚合膨润土（PB）为核心的GCL（PB-GCL）的自修复能力，即土工膜-GCL-土工膜和 GCL 上有损坏孔的粘土底土层复合衬垫系统。测试的粘土底土的初始含水量分别为 22.2% 和 26.8%。使用的液体是去离子 (DI) 水和 0.3 M NaCl 溶液。测试结果表明，PB-GCL和NB-GCL仅在底土上水合1~3个月，直径15 mm的损伤孔几乎不能自愈。对于在100mm土工膜顶部施加恒定液头的情况，自愈损伤孔的直径大小约为文献报道的向损伤孔提供充足液体的试验值的一半GCL。此外，对于测试条件和自愈情况，泄漏到地下土壤中的去离子水小于约60克，泄漏的0.3M NaCl溶液小于150克。