1.1 本试验方法包括沥青材料的浮动试验。 1.2 以国际单位制表示的数值应视为标准。本标准不包括其他计量单位。 1.3 警告 汞已被美国环保局和许多国家机构指定为可导致中枢神经系统、肾脏和肝脏损伤的危险物质。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谨慎。 有关详细信息，请参阅适用的产品材料安全数据表（MSDS）和EPA的网站(http://www.epa.gov/mercury/faq.htm)以获取更多信息。用户应意识到，在您所在的州销售汞或含汞产品，或两者兼有，可能受到州法律的禁止。 1.4 本标准的文本引用了提供解释性材料的注释和脚注。这些注释和脚注（不包括表和图中的注释和脚注）不应被视为本标准的要求。 1.5 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====== 4.1 浮动试验表征了某些沥青材料的流动特性或稠度。 4.2 该试验方法可用于确定沥青结合料或乳化沥青残渣的稠度，作为确定某些运输或供应来源的一致性的一个因素。 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 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；遵循规范的建议 D3666 或者一些类似的可接受的指导提供了评估和控制其中一些因素的手段。

1.1 This test method covers the float test for asphalt materials. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 Warning— Mercury has been designated by 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) for details and EPA’s website (http://www.epa.gov/mercury/faq.htm) for additional information. Users should be aware that selling mercury or 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 ====== 4.1 The float test characterizes the flow behavior or consistency of certain asphalt materials. 4.2 This test method is useful in determining the consistency of asphalt binder or emulsified asphalt residue as one element in establishing the uniformity of certain shipments or sources of supply. Note 1: The quality of results produced by this standard is 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 guidance provides a means of evaluating and controlling some of those factors.