1.1 本规程涵盖了在试验方法中所述的试样配置中测量和监测弹性填缝料物理尺寸的程序 C719 经过一段时间的压缩或拉伸。这些密封剂材料通常是高填充弹性材料。通过在一段时间内以特定间隔测量尺寸来确定这些密封剂材料的尺寸变化。 1.2 以国际单位制表示的数值应视为标准值。国际单位制后括号中给出的值仅供参考，不被视为标准值。 1.3 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。 1.4 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 已观察到许多密封剂在压缩或拉伸一段时间后发生尺寸变化，例如根据实践暴露期间发生的尺寸变化 C1589 . 已经表明，对于某些密封剂，增加风化暴露会增加尺寸稳定性所需的时间，并降低尺寸变化的幅度。尺寸稳定性和对稳定密封剂尺寸的了解对于通过测试（如测试方法）准确测量密封剂模量至关重要 C1735 . 5.2 该实践将用于提高由标准（如测试方法）确定的模量的准确性 C1735 在达到稳定性后，使用本规程确定的精确尺寸。

1.1 This practice covers a procedure for measuring and monitoring the physical dimensions of an elastomeric joint sealant in a test specimen configuration described in Test Method C719 following a period of compression or tension. These sealant materials are typically highly filled elastic materials. The dimensional change of these sealant materials is determined by measuring the dimensions at specific intervals over a period of time. 1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. 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 ====== 5.1 Many sealants have been observed to dimensionally change following a period of compression or tension, such as occurs during exposure in accordance with Practice C1589 . It has been shown that for some sealants, increasing exposure to weathering increases the time required for dimensional stability and decreases the magnitude of dimensional change. Dimensional stability and knowledge of the stable sealant dimensions are critical to the accurate measurement of the sealant’s modulus by a test such as Test Method C1735 . 5.2 This practice will find application in improving the accuracy of the modulus determined by a standard such as Test Method C1735 by using the accurate dimensions determined by this practice after stability is attained.