1.1 本试验方法测定了在等温条件下，在规定的时间间隔内将这些材料完全浸入液态水中后，隔热材料的扁平或圆柱形试样保留的水量（不包括地表水）。本试验方法旨在用于实验室材料的表征。其目的不是模拟建筑施工应用中可能遇到的任何特定环境条件。 1.2 本试验方法并未解决所有可能的吸水和保水机制以及隔热的相关现象。它仅与中概述的条件有关 1.1 . 测定因部分浸入、水蒸气传输、内部冷凝、冻结而在隔热材料中积累的水分- 解冻循环或这些影响的组合需要不同的测试程序。 1.3 本试验方法不涉及或试图量化材料的排水特性。 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不一定是精确的等价物；因此，为确保符合本标准，每个系统应独立使用，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。 1.6 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====== 6.1 本试验方法提供了一种测量绝热材料的扁平或圆柱形试样在等温条件下直接浸入液态水后的吸水率的方法。它用于质量控制以及产品和材料规范。 6.2 使用的程序:A、B或C以及任何例外情况应在引用本试验方法的材料规范中注明。 6.3 在一次浸泡时间内，仅确定了一种类型和尺寸的材料的重复性。 注1: 鼓励参考本试验方法的规范确定特定材料、浸泡时间和尺寸的可重复性，以纳入本试验方法。

1.1 This test method determines the amount of water retained (excluding surface water) by flat or cylindrical specimens of thermal insulations after these materials have been fully immersed in liquid water for a prescribed time interval under isothermal conditions. This test method is intended to be used for the characterization of materials in the laboratory. It is not intended to simulate any particular environmental condition potentially encountered in building construction applications. 1.2 This test method does not address all the possible mechanisms of water intake and retention and related phenomena for thermal insulations. It relates only to those conditions outlined in 1.1 . Determination of moisture accumulation in thermal insulations due to partial immersion, water vapor transmission, internal condensation, freeze-thaw cycling, or a combination of these effects requires different test procedures. 1.3 This test method does not address or attempt to quantify the drainage characteristics of materials. 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 ====== 6.1 This test method provides a means of measuring the water absorption of flat or cylindrical specimens of thermal insulation materials under isothermal conditions as a result of direct immersion in liquid water. It is intended for quality control and product and material specifications. 6.2 The procedure to be used: A, B, or C as well as any exceptions shall be noted in material specifications citing this test method. 6.3 Repeatability has been established only for one type and size of material at one immersion duration. Note 1: Specifications referring to this test method are encouraged to establish repeatability for specific materials, immersion duration, and dimensions for inclusion in this test method.