1.1 本试验方法用于测量粒径小于等于1 mm的水泥基材料的流变特性，如塑性粘度和屈服应力。 1.2 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.3 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。 1.4 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》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 流变特性提供了有关水泥浆或砂浆和易性的信息。本试验方法可用于测量水泥浆的流动性或特定材料或材料组合对流动性的影响。 5.2 由于流变特性对样品的不均匀性很敏感，因此使用该程序时需要特别小心，以避免沉降、颗粒从纺锤上迁移或纺锤和容器表面滑动。

1.1 This test method is used to measure the rheological properties such as plastic viscosity and yield stress of cementitious materials with particles up to 1 mm in diameter. 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 Rheological properties provide information about the workability of cementitious paste or mortar. This test method may be used to measure flowability of a cement paste or the influence of a specific material or combination of materials on flowability. 5.2 As rheological properties are sensitive to sample heterogeneities, special care is needed using this procedure so that sedimentation, particle migration away from the spindle or slippage at the surface of the spindle and container, is avoided.