1.1 本试验方法包括使用数字密度计（U型管）测定半固态沥青材料、沥青粘合剂、沥青水泥和软沥青的相对密度和密度。 注1: 测定半固体和固体沥青材料以及沥青结合料密度的替代方法包括试验方法 第3289页 ， D3142/D3142M 和 D70/D70米 。 1.2 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。除温度测量外，本标准不包括其他测量单位。以华氏度为单位提供的单位仅供参考。 以摄氏度为单位的温度被视为标准温度。 1.3 该试验方法不应适用于除沥青和沥青结合料以外的石油馏出物。使用试验方法测定所有其他石油馏分和粘性油的密度 D4052型 或 D5002天 ，或ISO 12185。 1.4 本标准的文本引用了提供解释材料的注释和脚注。这些脚注（不包括表和图中的脚注）不应被视为本标准的要求。 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）。本标准的使用者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》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 5.1 密度值用于将体积转换为质量单位，并使用实践将测量温度下的测量体积校正为标准温度 D4311/D4311米 。 注2: 本标准产生的结果的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 通常被认为能够胜任和客观的测试、取样、检查等。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 或者一些类似的可接受的指导方针提供了评估和控制其中一些因素的手段。

1.1 This test method covers the determination of the relative density and density of semi-solid asphalt materials, asphalt binders, asphalt cements, and soft-tar pitches by use of a digital density meter (U-tube). Note 1: Alternate methods for determining the density of semi-solid and solid asphalt materials and asphalt binders include Test Methods D3289 , D3142/D3142M , and D70/D70M . 1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only. No other units of measurement are included in this standard, with the exception of temperature measurements. Units provided in degrees Fahrenheit are for reference purposes only. Temperatures given in degrees Celsius are to be considered standard. 1.3 This test method should not be applied to petroleum distillates other than asphalt and asphalt binders. For the determination of density of all other petroleum distillates and viscous oils, use Test Method D4052 or D5002 , or ISO 12185. 1.4 The text of this standard references notes and footnotes which provide explanatory material. These 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 at the measured temperature to a standard temperature using Practice D4311/D4311M . 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.