1.1 这些试验方法 2. 测定柔性膜的性能，将其用作混凝土板下、靠墙接触土壤的蒸汽缓凝剂，或用作爬行空间的地面覆盖层。试验方法主要适用于塑料薄膜和其他柔性板。材料不会承受持续的静水压力。这些程序模拟了蒸汽缓凝剂在安装之前、安装期间以及使用中可能遇到的条件。 1.2 试验方法包括: 部分 接收时材料的水蒸气透过率 7. 湿润和干燥后以及长时间后的水蒸汽传输- 时间浸泡 8. 抗拉强度 9 抗穿刺性 10 抗塑性流动和高温 11 低温对柔韧性的影响 12 抗微生物和物质劣化能力- 触感土 13 土壤毒物对石油运输工具劣化的耐受性 14 耐紫外线老化 15 抗火焰蔓延性 16 汇报 17 1.3 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。 1.4 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。 1.5 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 在使用中，蒸汽缓凝剂可能会暴露在各种条件下，因此任何一项测试都不会对所有暴露的性能进行评估（请参阅指南 E241 和实践 C755 ). 在特定暴露的所有评估中，也不需要列出所有测试方法（参见 16.2 ). 4.2 限制- 在使用和使用之前，蒸汽缓凝剂可能会暴露在各种条件下，因此任何一项测试都不会对所有暴露的性能进行评估（请参阅指南 E241 和实践 C755 ). 在特定暴露的所有评估中，也不需要进行所有测试。因此，测试和要求的测试结果应由买方和供应商商定（见 16.2 ).

1.1 These test methods 2 cover the determination of the properties of flexible membranes to be used as vapor retarders in contact with earth under concrete slabs, against walls, or as ground cover in crawl spaces. The test methods are applicable primarily to plastic films and other flexible sheets. The materials are not intended to be subjected to sustained hydrostatic pressure. The procedures simulate conditions to which vapor retarders may be subjected prior to and during installation, and in service. 1.2 The test methods included are: Section Water-Vapor Transmission of Material as Received 7 Water-Vapor Transmission after Wetting and Drying and after Long- Time Soaking 8 Tensile Strength 9 Resistance to Puncture 10 Resistance to Plastic Flow and Elevated Temperature 11 Effect of Low Temperatures on Flexibility 12 Resistance to Deterioration from Organisms and Substances in Con- tacting Soil 13 Resistance to Deterioration from Petroleum Vehicles for Soil Poisons 14 Resistance to Deterioration from Exposure to Ultraviolet Light 15 Resistance to Flame Spread 16 Report 17 1.3 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. 1.4 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. 1.5 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 In service, vapor retarders may be exposed to a variety of conditions, so no one test will provide evaluations related to performance for all exposures (refer to Guide E241 and Practice C755 ). Neither will all test methods listed be necessary in all evaluations for specific exposures (see 16.2 ). 4.2 Limitations— Prior to use and in service, vapor retarders may be exposed to a variety of conditions so no one test will provide evaluations related to performance for all exposures (refer to Guide E241 and Practice C755 ). Neither will all tests be necessary in all evaluations for specific exposures. Consequently, the tests and required test results shall be agreed upon by the purchaser and the supplier (see 16.2 ).