1.1 该试验方法包括一项指数试验，该试验包括使用柔性壁渗透计对饱和土工合成粘土衬垫（GCL）试样的通量进行实验室测量。 1.2 本试验方法适用于具有土工布衬垫的GCL产品。它不适用于带有土工膜背衬、土工薄膜背衬或聚合物涂层背衬的GCL产品。 1.3 该测试方法提供了在一组可用于制造质量控制的规定条件下的通量测量。该测试方法也可用于检查一致性。 使用该试验方法确定的通量值不被视为GCL在役通量的代表。 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。每个系统中规定的值不一定是完全相等的；因此，为了确保符合标准，每个系统应独立使用，并且两个系统的值不得组合。 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）。 本标准的使用者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。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ===意义和用途====== 5.1 该试验方法产生了在规定条件下固结、水合和渗透的饱和GCL试样中的水流量。 5.2 该试验方法可用于确定GCL试样的通量是否超过制造商规定的最大值。 5.3 该测试方法可用于通过测试多个不同的样本来确定GCL样本内通量的变化。 5.4 该试验方法未提供可直接用于设计计算的通量值。 注1: in的通量- 使用条件取决于许多因素，包括围压、水化液类型、水化程度、饱和度、渗透液类型和水力梯度。使用该试验方法获得的通量值与在役条件下通过GCL的通量之间的相关性尚未得到充分研究。 5.5 该试验方法未提供导水率值。尽管可以采用与本试验方法中所述方法类似的方法来确定导水率，但计算导水率需要试样的厚度。 本试验方法不包括GCL厚度的测量程序，也不包括测量GCL内粘土成分厚度的程序。提到 附录X2 用于水力传导率的计算。 5.6 该试验方法中使用的仪器通常用于测定土壤样品的导水性。然而，该试验中测得的通量值通常远低于大多数天然土壤的通量值。本试验中使用的仪器的泄漏率必须小于10 % 通量。

1.1 This test method covers an index test that covers laboratory measurement of flux through saturated geosynthetic clay liner (GCL) specimens using a flexible wall permeameter. 1.2 This test method is applicable to GCL products having geotextile backing(s). It is not applicable to GCL products with geomembrane backing(s), geofilm backing(s), or polymer coating backing(s). 1.3 This test method provides a measurement of flux under a prescribed set of conditions that can be used for manufacturing quality control. The test method can also be used to check conformance. The flux value determined using this test method is not considered to be representative of the in-service flux of GCLs. 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 are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 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. 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 ====== 5.1 This test method yields the flux of water through a saturated GCL specimen that is consolidated, hydrated, and permeated under a prescribed set of conditions. 5.2 This test method can be performed to determine if the flux of a GCL specimen exceeds the maximum value stated by the manufacturer. 5.3 This test method can be used to determine the variation in flux within a sample of GCL by testing a number of different specimens. 5.4 This test method does not provide a flux value to be used directly in design calculations. Note 1: Flux for in-service conditions depends on a number of factors, including confining pressure, type of hydration fluid, degree of hydration, degree of saturation, type of permeating fluid, and hydraulic gradient. Correlation between flux values obtained with this test method and flux through GCLs subjected to in-service conditions has not been fully investigated. 5.5 This test method does not provide a value of hydraulic conductivity. Although hydraulic conductivity can be determined in a manner similar to the method described in this test method, the thickness of the specimen is needed to calculate hydraulic conductivity. This test method does not include procedures for measuring the thickness of the GCL nor of the clay component within the GCL. Refer to Appendix X2 for calculation of hydraulic conductivity. 5.6 The apparatus used in this test method is commonly used to determine the hydraulic conductivity of soil specimens. However, flux values measured in this test are typically much lower than those commonly measured for most natural soils. It is essential that the leakage rate of the apparatus used in this test be less than 10 % of the flux.