1.1 本试验方法包括在25℃下测定未压实沥青混合料的理论最大比重和密度 °C[77 °F]。 1.2 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。 1.2.1 残余压力测量值以国际单位制kPa和常用的非标准等效单位“毫米汞柱”表示 1.2.2 体积和质量的测量仅以国际单位制为单位，因为它们是实施本试验方法时在实践中通常使用的唯一单位。 1.3 本标准的文本引用了提供解释材料的注释和脚注。这些注释和脚注（不包括表和图中的注释和脚注）不应视为本标准的要求。 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 沥青混合料的理论最大比重和密度是基本特性，其值受混合料的组成（骨料、沥青粘合剂和混合料中存在的其他材料的类型和数量）的影响。 5.1.1 使用最大比重( 1. )在计算压实沥青混合料中的空隙率时( 2. )在计算骨料吸收的沥青结合料量时，以及( 3. )提供沥青混合料压实的目标值。 注1: 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 D3666 通常认为能够胜任和客观的测试、抽样、检查等。本标准的用户应注意遵守规范 D3666 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；遵循规范建议 D3666 或一些类似的可接受指南提供了评估和控制其中一些因素的方法。

1.1 This test method covers the determination of the theoretical maximum specific gravity and density of uncompacted asphalt mixtures at 25 °C [77 °F]. 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 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. 1.2.1 Residual pressure measurements are shown in both the SI unit of kPa and the commonly used nonstandard equivalent unit of “mm of Hg.” 1.2.2 Measurements of volume and mass are only given in SI units because they are the only units typically used in practice when performing this test method. 1.3 The text of this standard 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 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 The theoretical maximum specific gravities and densities of asphalt mixtures are fundamental properties whose values are influenced by the composition of the mixture in terms of types and amounts of aggregates, asphalt binder, and other materials present in the mixtures. 5.1.1 Maximum specific gravity is used ( 1 ) in the calculation of air voids in the compacted asphalt mixture, ( 2 ) in calculating the amount of asphalt binder absorbed by the aggregate, and ( 3 ) to provide target values for the compaction of asphalt mixtures. Note 1: 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.