1.1 本试验方法涵盖实验室测定由非沥青有机屋顶膜材料制成的接缝的失效时间（蠕变断裂）。试验方法涵盖在受控环境条件下承受恒定拉伸载荷的T形剥离和搭接剪切接头。接缝由非增强或织物增强膜材料制成，在实验室制备或从使用中的屋顶取样。 1.2 用于制造接头的板材包括硫化橡胶、非硫化聚合物板材和热塑性塑料。 接头形成的粘接方法包括使用液基粘合剂、预制胶带以及热焊接和溶剂焊接工艺。 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====== 5.1 影响非沥青膜接缝性能的一个重要因素是其在膜预期使用寿命内保持粘结的能力。失效时间测试提供了一种表征接头在恒定载荷下随时间变化的行为的方法。 5.2 蠕变是流变特性的敏感指标，取决于材料、载荷、温度和时间。在相对较短的时间内获得的失效时间数据可以评估影响接头在相对较长时间内承受静载荷能力的一个因素。 5.3 非沥青有机屋顶膜试样接缝的失效时间数据可用于以下方面:( 1. )提供接头承载能力的测量值，作为不同负荷、温度和相对湿度水平下时间的函数；( 2. )根据影响性能的因素对接头进行表征，如被粘物的表面处理、溶剂基粘合剂的厚度和打开时间、粘合剂应用和固化期间的环境以及热焊接过程的温度； 和( 3. )比较不同粘接工艺或粘接材料对接头性能的影响。 5.4 虽然认为通过本实验室试验获得的结果可以提供对使用中接缝性能的测量，但前提是已知负载、温度和湿度条件，尚未建立直接相关性。

1.1 This test method covers laboratory determination of the time-to-failure (creep-rupture) of joints fabricated from nonbituminous organic roof membrane material. The test method covers both T-peel and lap-shear joints subjected to constant tensile load under controlled environmental conditions. The joints, made from either unreinforced or fabric-reinforced membrane material, are prepared in the laboratory or sampled from roofs in service. 1.2 Sheet materials from which the joints are fabricated include vulcanized rubbers, nonvulcanized polymeric sheets, and thermoplastics. The bonding methods for joint formation include the use of liquid-based adhesives, preformed tapes, and thermal and solvent weld processes. 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 nonconformance 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 ====== 5.1 An important factor affecting the performance of joints of nonbituminous membranes is their ability to remain bonded over the membrane's expected service life. Time-to-failure tests provide a means of characterizing the behavior of joints under constant load over time. 5.2 Creep is a sensitive index of rheological properties that depend on material, load, temperature, and time. Time-to-failure data that are obtained over a relatively short time period can evaluate one factor affecting a joint's ability to withstand static loading over a relatively long time period. 5.3 Time-to-failure data for joints of nonbituminous organic roof membrane specimens can be used for the following: ( 1 ) to provide a measure of the load-carrying ability of the joint as a function of time at various levels of load, temperature, and relative humidity; ( 2 ) to characterize the joint with regard to factors affecting performance, such as surface preparation of the adherend, solvent-based adhesive thickness and open time, environment during adhesive application and cure, and temperature of thermal welding processes; and ( 3 ) to compare the effects of different bonding processes or adhesive bonding materials on joint performance. 5.4 While it is considered that the results obtained by this laboratory test may afford a measure of the performance of seams in service, provided that load, temperature, and humidity conditions are known, no direct correlation has been established.