1.1 本试验方法利用转桨式粘度计测定乳化沥青的粘度。它适用于规范中描述的所有乳化沥青 D977 和 D2397/D2397M . 1.2 以SI单位表示的值将被视为标准值。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性问题（如果有）。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法规限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（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》中确立的国际公认的标准化原则制定的。======意义和用途====== 5.1 乳化沥青的粘度表征其流动性能，并影响其在50℃或其他温度下的效用。对于许多应用，乳化沥青的可喷涂性和可加工性与其粘度直接相关。材料必须足够薄才能喷涂，但又足够厚，以免从道路的顶部或坡度流出。对于混合级乳化沥青，粘度将影响其和易性和在集料上产生的膜厚度。该测试方法可用于测量乳化沥青在50℃、25℃或其他商定温度下的表观粘度。预设温度和100r/min的转速允许在短时间内自动且一致地测定乳化沥青粘度。附注1: 本标准产生的结果的质量取决于执行该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。本标准的使用者应注意符合规范 D3666 单独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南提供了评估和控制这些因素中的一些的方法。

1.1 This test method utilizes the rotational paddle viscometer to measure the viscosity of emulsified asphalt. It is applicable to all the emulsified asphalts described in Specifications D977 and D2397/D2397M . 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 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 ====== 5.1 The viscosity of emulsified asphalts characterizes their flow properties and affects their utility at 50 °C or at other temperatures. The sprayability and workability of an emulsified asphalt are directly related to its viscosity for many applications. The material must be thin enough to be sprayed yet thick enough such that it will not flow from the crown or grade of the road. For mixing-grade emulsified asphalts, the viscosity will affect its workability and resulting film thickness on the aggregate. This test method is useful to measure the apparent viscosity of emulsified asphalt at a temperature of 50 °C, 25 °C, or another agreed-upon temperature. The preset temperature and rotational speed at 100 r/min allow for an automated and consistent determination of an emulsified asphalt viscosity within a short time. 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.