1.1 本试验方法包括测定压实沥青混合料中的空隙率。 1.2 单位- 以国际单位表示的值应视为标准值。本标准不包括其他计量单位。 1.3 本标准并不旨在解决与其使用相关的所有安全问题（如有）。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 沥青混合料中的空隙率用作设计方法中的标准之一，并用于评估沥青铺路项目中的压实度。 注1: 本试验方法的文本参考了提供说明材料的注释和脚注。这些注释和脚注（表和图中的注释除外）不应视为试验方法的要求。 注2: 本标准产生的结果质量取决于执行程序的人员的能力以及所用设备的能力、校准和维护。符合规范标准的机构 第3666页 通常认为能够胜任和客观的测试、取样、检验等。 本标准的用户应注意遵守规范 第3666页 单独使用并不能完全确保可靠的结果。可靠的结果取决于许多因素；遵循规范的建议 第3666页 或一些类似的可接受的指南提供了评估和控制这些因素中的一些因素的方法。

1.1 This test method covers determination of the percent air voids in compacted asphalt mixtures. 1.2 Units— The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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 ====== 4.1 The percent of air voids in an asphalt mixture is used as one of the criteria in the design methods and for evaluation of the compaction imparted in asphalt paving projects. Note 1: The text of this test method references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the test method. Note 2: The quality of the results produced by this standard are dependent on the competence of the personnel performing the procedure and the capability, calibration, and maintenance of the equipment used. Agencies that meet the criteria of Specification D3666 are generally considered capable of competent and objective testing, sampling, inspection, etc. Users of this standard are cautioned that compliance with Specification D3666 alone does not completely ensure reliable results. Reliable results depend on many factors; following the suggestions of Specification D3666 or some similar acceptable guideline provides a means of evaluating and controlling some of those factors.