1.1 本试验方法涵盖了用于预掺骨料（PA）混凝土的新拌水硬性水泥浆混合物的保水性测定程序。 1.2 以国际单位制表示的数值应视为标准。本标准中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）不应被视为本标准的要求。 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。 ( 警告- 新鲜的水硬性水泥混合物具有腐蚀性，长时间暴露可能会对暴露的皮肤和组织造成化学灼伤。 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 该试验方法测量浆液混合物保持其混合水的能力。 5.2 它用于鉴定PA混凝土生产中使用的浆液流化器。 5.3 它可用于比较各种外加剂或材料组合对任何水泥水浆液保水性能的影响。

1.1 This test method covers the procedure for determining the water retentivity of freshly mixed hydraulic cement grout mixtures for preplaced-aggregate (PA) concrete. 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 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 exposed 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 measures the ability of a grout mixture to retain its mixing water. 5.2 It is used for qualifying grout fluidifiers to be used in the production of PA concrete. 5.3 It may be used to compare the effects of various admixtures or materials combinations on the water retentivity properties of any cement-water grout.