1.1 本试验方法包括在实验室和现场测定新拌混凝土的K坍落度。 1.2 标准值为国际单位制。本标准不包括其他计量单位。 1.3 本标准的文本是指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）不应视为本标准的要求。 1.4 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。( 警告- 新鲜的水硬性胶结混合物具有腐蚀性，长时间接触可能会导致皮肤和组织化学烧伤。 2. ) 1.5 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 该试验方法允许快速评估新拌混凝土的稠度。 5.2 该试验方法可用于提供新拌混凝土混合物稠度随时间变化的信息。它对于评估流动或自固结混凝土混合物的稠度特别有价值。 5.3 该试验方法可用于评估新拌混凝土稠度的批次间变化。 5.4 K-坍落度值与根据试验方法测得的坍落度之间没有一般的可靠关系 C143/C143M 或根据试验方法测量的坍落度流量 C1611/C1611M . 然而，该测试方法可用作质量控制工具。例如，用户可以在实验室进行试验批次，并确定与坍落度或坍落度流的可接受范围相对应的K坍落度范围。K-坍落度范围可用于检查现场批次的一致性。 5.5 本试验方法不适合作为混凝土验收或拒收的依据。

1.1 This test method covers determination the K-slump of freshly mixed concrete, both in the laboratory and in the field. 1.2 The values stated SI units are the standard. No other units of measurement are included in this standard. 1.3 The text of this standard refers to notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard. 1.4 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. ( Warning— Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure. 2 ) 1.5 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 This test method permits a rapid assessment of the consistency of freshly mixed concrete. 5.2 This test method can be used to provide information on the change in consistency with time of a freshly mixed concrete mixture. It is especially valuable for assessing the consistency of flowing or self-consolidating concrete mixtures. 5.3 This test method can be used to assess batch-to-batch variations in consistency of freshly mixed concrete. 5.4 There is no general reliable relationship between the K-slump value and slump measured in accordance with Test Method C143/C143M or slump flow measured in accordance with Test Method C1611/C1611M . However, this test method is useful as a quality control tool. For example, the user can make trial batches in the laboratory and determine the range in K-slump corresponding to an acceptable range in slump or slump flow. That range in K-slump can be used to check the consistency of field batches. 5.5 This test method is not suitable as the basis for acceptance or rejection of concrete.