1.1 本试验方法包括一种指数法，该方法能够评估沉积在6 % 在100 psi（kPa）压力下的粘土矿物固体泥浆，作为衡量其对土工合成粘土衬垫（GCL）渗透性或导水率降低的有用性。本试验方法不适用于含有聚合物的粘土。 1.2 本试验方法改编自美国石油学会膨润土钻井液规范。 1.3 粉状粘土矿物在生产时进行测试；粒状粘土矿物应研磨至100 % 通过100目美国标准筛，最小65 % 使用整个研磨产品通过200目美国标准筛进行测试。 1.4 以国际单位制或英寸-磅单位表示的数值应单独视为标准值。 每个系统中规定的值可能不是精确的等效值；因此，每个系统应相互独立使用。将两个系统的值合并可能会导致不符合标准。 1.5 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 2. 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 粘土矿物是GCL的功能成分，可降低工业废水或地下水通过衬垫的渗透性。 4.2 粘土矿物质量可能会发生显著变化，并影响GCL复合材料的水力传导率。本试验方法评估了与性能相关的粘土矿物的重要特性。

1.1 This test method covers an index method that enables the evaluation of fluid loss properties of a clay mineral film deposited on a filter paper from a 6 % solids slurry of clay mineral at 100-psi (kPa) pressure as a measure of its usefulness for permeability or hydraulic conductivity reduction in geosynthetic clay liners (GCL). This test method is not applicable for clays with polymers. 1.2 This test method is adapted from American Petroleum Institute drilling fluid specifications for bentonite. 1.3 Powdered clay mineral is tested as produced; granular clay mineral should be ground to 100 % passing a 100 mesh U.S. Standard Sieve with a minimum of 65 % passing a 200 mesh U.S. Standard Sieve with the whole ground product used for testing. 1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 2 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 Clay mineral is the functional component of GCL that reduces the hydraulic conductivity of industrial waste or ground water through the liner. 4.2 Clay mineral quality can vary significantly and affect the hydraulic conductivity of the GCL composite. This test method evaluates a significant property of clay mineral that relates to performance.