ISO 10769:2011规定了确定膨润土吸水率的方法。膨润土组分是粘土土工合成屏障（GBR-C）的一部分。吸水性取决于细颗粒的比表面和膨润土的表面活性。该测试为GBR-C的生产控制测试提供了一个指标值

ISO 10769:2011 specifies a method for determining the water absorption of bentonite. The bentonite component is a part of clay geosynthetic barriers (GBR-C). Water absorption depends on the specific surface of the fine particles and the surface activity of the bentonite. The test provides an index value for production control testing of GBR-C.