1.1 本试验方法包括沥青屋面膜拉伸撕裂强度的测定。 1.2 以SI单位或英寸-磅单位表示的值应单独视为标准值。每个系统中陈述的值不一定完全等同；因此，为确保符合标准，每个系统应独立使用，两个系统的数值不得合并使用。 1.3 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。 1.4 本国际标准是根据国际公认的标准化原则制定的，该原则载于世界贸易组织技术性贸易壁垒委员会。 ======意义和用途====== 4.1 确定屋面膜的实验室和现场样品的拉伸-撕裂强度应有助于制定性能标准，并作为比较不同材料和系统的基础。温度、湿度和老化的影响可以通过适当选择现场样品或调节实验室样品来评估，并且测试可以在环境室中进行。

1.1 This test method covers the determination of the tensile-tear strength of bituminous roofing membranes. 1.2 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. 1.3 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. 1.4 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 Determining the tensile-tear strength of laboratory and field samples of roofing membranes should be useful in developing performance criteria, and as one basis for comparison of different materials and systems. The effects of temperature, moisture, and aging may be evaluated by appropriate selection of field samples or conditioning of laboratory samples, and tests may be conducted in an environmental chamber.