1.1 本试验方法涵盖了根据密封剂在反复暴露于实验室加速风化程序后保持粘附力和内聚力的循环运动中的功能来确定其耐久性的方法。 1.2 本试验方法描述了两种实验室加速风化程序，用于评估密封剂的耐久性。 1.3 RILEM TC139–DBS与本试验方法有关。 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 本试验方法描述了评估或比较（或两者兼有）密封件在接缝中经受加速风化和循环运动时的耐久性的程序。 4.2 密封剂安装程序、设计注意事项和固化过程中的移动会影响老化过程，是任何密封剂成功的基础。本试验方法未解决这些因素。 4.3 密封剂在其使用寿命内经历的移动量、类型和频率在很大程度上取决于施工中使用的材料、接缝朝向阳光的方向以及许多其他不均匀或不一致的因素。 4.4 气候暴露将因建筑方向和遮阳以及当地和区域气候条件而不同。由于太阳辐射、温度、降雨量和大气条件的不同，特定位置的气候可能每年都不同。此外，地球表面太阳辐射的质量和强度随地理位置、季节、时间和云层而变化。 4.5 当操作条件在本试验方法的可接受范围内变化时，结果可能会发生变化。 因此，使用本试验方法的所有试验结果必须随附第节要求的特定操作条件报告 11 .参考实践 G151页 有关适用于使用根据本试验方法获得的结果的注意事项的详细信息。 4.6 实验室暴露的结果不能直接外推以估计自然风化引起的绝对劣化率，因为加速因子取决于材料，并且对于每种材料和同一材料的不同配方，加速因子可能会显著不同。然而，暴露具有已知室外性能的类似材料（对照品）以及试样，可以比较在试验条件下相对于对照品的耐久性。 相对耐久性方面的评估也大大提高了不同实验室之间测试结果的一致性。 4.7 该程序的结果将取决于根据实践操作设备时的谨慎程度 G154页 和 G155页 重要因素包括:线路电压的调节、无盐或其他水沉积物、温度控制、湿度控制（如适用）、氙弧设备中燃烧器和过滤器的条件和使用寿命，以及荧光紫外线设备中灯具的使用寿命。 注1: 指南中提供了关于可变性来源以及解决实验室加速暴露试验设计、执行和数据分析中可变性的策略的更多信息 G141页 .

1.1 This test method covers the method for the determination of the durability of a sealant based on its ability to function in cyclic movement maintaining adhesion and cohesion after repeated exposure to laboratory accelerated weathering procedures. 1.2 This test method describes two laboratory accelerated weathering procedures for evaluating the durability of a sealant. 1.3 RILEM TC139–DBS is related to this test method. 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 This test method describes the procedure to evaluate or compare, or both, the durability of sealants when subjected to accelerated weathering and cyclic movement in a joint. 4.2 Sealant installation procedures, design considerations and movement during cure affect the aging processes and are fundamental to the success of any sealant. These factors are not addressed with this test method. 4.3 The amount, type and frequency of movement a sealant experiences during its lifetime strongly depends on the materials used in construction and on the orientation of the joint toward sunlight and many other factors that are not uniform or consistent. 4.4 Climatic exposures will differ with the orientation of the building and shading as well as with local and regional climatic conditions. Climates in a given location can vary from year to year because of differences in solar radiation, temperature, rainfall, and atmospheric conditions. Further, the quality and intensity of solar radiation on the earth's surface varies with geographic location, season, time of day, and cloud cover. 4.5 Variations in results may be expected when operating conditions are varied within the accepted limits of this test method. Therefore, all test results using this test method must be accompanied by a report of the specific operating conditions as required in Section 11 . Refer to Practice G151 for detailed information on the caveats applicable to use of results obtained according to this test method. 4.6 The results of laboratory exposure cannot be directly extrapolated to estimate an absolute rate of deterioration caused by natural weathering because the acceleration factor is material dependent and can be significantly different for each material and for different formulations of the same material. However, exposure of a similar material of known outdoor performance, a control, along with the test specimens allows comparison of the durability relative to that of the control under the test conditions. Evaluation in terms of relative durability also greatly improves the agreement in test results among different laboratories. 4.7 Results of this procedure will depend on the care that is taken to operate the equipment according to Practices G154 and G155 . Significant factors include regulation of the line voltage, freedom from salt or other deposits from water, temperature control, humidity control, where applicable, condition and age of the burners and filters in xenon arc equipment, and age of lamps in fluorescent UV equipment. Note 1: Additional information on sources of variability and on strategies for addressing variability in the design, execution and data analysis of laboratory accelerated exposure tests is found in Guide G141 .