1.1 本试验方法包括使用比重瓶测定半固态沥青粘合剂的比重（相对密度）和密度。 注1: 测定沥青结合料比重或密度的另一种方法是试验方法 D3289页 . 测定沥青结合料密度的另一种方法是试验方法 D8188 . 对于流动性太大而无法使用本试验方法的材料，请使用试验方法 D3142/D3142M . 注2: 本试验方法也可用于测定软焦油沥青的比重（相对密度）和密度。 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。 1.3 警告- 美国环境保护署（EPA）和许多州机构已将汞指定为可导致中枢神经系统、肾脏和肝脏损害的危险物质。汞或其蒸汽可能对健康有害，并对材料具有腐蚀性。 处理汞和含汞产品时应小心。有关详细信息，请参阅适用的产品材料安全数据表（MSDS）或安全数据表（SDS），有关更多信息，请访问美国环保局网站（www.EPA.gov/mercury/faq.htm）。用户应意识到，州法律可能禁止在您所在州销售汞、含汞产品或两者兼有。 1.4 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。 1.5 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。 1.6 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 密度值用于将体积转换为质量单位，并使用惯例将测量体积从测量温度修正为标准温度 D4311/D4311M . 5.2 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 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 specific gravity (relative density) and density of semi-solid asphalt binder by use of a pycnometer. Note 1: An alternate method for determining the specific gravity or density of asphalt binder is Test Method D3289 . An alternate method for determining density of asphalt binder is Test Method D8188 . For materials which are too fluid for use of this test method, use Test Method D3142/D3142M . Note 2: This test method may also be used for the determination of the specific gravity (relative density) and density of soft tar pitches. 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. 1.3 Warning— Mercury has been designated by the United States Environmental Protection Agency (EPA) and many state agencies as a hazardous material that can cause central nervous system, kidney, and liver damage. Mercury, or its vapor, may be hazardous to health and corrosive to materials. Caution should be taken when handling mercury and mercury-containing products. See the applicable product Material Safety Data Sheet (MSDS) or Safety Data Sheet (SDS) for details and the EPA’s website (www.epa.gov/mercury/faq.htm) for additional information. Users should be aware that selling mercury, mercury-containing products, or both, in your state may be prohibited by state law. 1.4 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. 1.5 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. 1.6 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 Values of density are used for converting volumes to units of mass, and for correcting measured volumes from the temperature of measurement to a standard temperature using Practice D4311/D4311M . 5.2 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 evaluation and controlling some of these factors.