1.1 本规范涵盖了水硬性水泥制造并准备出售后的取样和数量测试程序。 1.2 以SI单位或英寸-磅单位表示的值应单独视为标准值。每个系统中陈述的值可能不完全等同；因此，每个系统应独立使用。合并两个系统的值可能导致不符合标准。SI单位[或英寸-磅单位]的值应通过SI单位[或英寸-磅单位]测量或通过适当的转换获得，使用标准IEEE/ASTM SI 10中给出的转换和舍入规则。当实践中不使用英寸-磅单位时，值仅以SI单位表示。 1.3 本标准的正文参考了提供解释材料的注释和脚注。这些注释和脚注（不包括表格和图表中的注释和脚注）不应被视为标准的要求。 1.4 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。 1.5 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》中确立的国际公认的标准化原则制定的。 ======意义和用途====== 4.1 所描述的取样程序旨在用于水硬性水泥生产并准备出售后的样品采购。它们不打算作为生产过程中用于质量控制目的的取样程序。概述的测试程序涵盖了要进行的测试量，并为报告水泥是否符合采购规范要求提供了指导。 4.2 本规程称为天然水泥取样规程（规范 C10/C10M ）、砌体水泥（规范 C91/C91M ）、波特兰水泥（规范 C150/C150M ）、混合水硬性水泥（规范 C595/C595M ）、膨胀水硬性水泥（规范 C845/C845M ）、基于性能规范的水硬性水泥（规范 C1157/C1157M ）、塑料灰泥水泥（规范 C1328/C1328M ）和砂浆水泥（规范 C1329/C1329M ），以及 4.3 大多数建筑规范和施工规范要求工程中使用的水硬性水泥符合相关采购规范的适用要求，如规范 C10/C10M , C91/C91M , C150/C150M , C595/C595M , C1157/C1157M , C1328/C1328M , C1329/C1329M ，或 C845/C845M 如果规范或规范要求对制造的水泥进行取样，则 4.4 是适用的。在这种取样和测试的基础上，销售的水泥不多。PRC-225中包含了对水泥取样和测试的有用讨论。 4.4 本规范中涵盖的程序应由或为水硬性水泥的购买者完成，这些购买者使用要求取样和测试以确定样品是否符合相关验收规范的规范或规范。使用指定的方法进行测试，以确定样品产生的测试结果是否符合质量标准，并且测试作为接受或拒绝取样批次材料的基础。 4.5 既不打算也不要求使用第节中引用的所有试验方法对所有水泥进行试验 2 .

1.1 This practice covers procedures for sampling and for the amount of testing of hydraulic cement after it has been manufactured and is ready to be offered for sale. 1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. Values in SI units [or inch-pound units] shall be obtained by measurement in SI units [or inch-pound units] or by appropriate conversion, using the Rules for Conversion and Rounding given in Standard IEEE/ASTM SI 10, Values are stated in only SI units when inch-pound units are not used in practice. 1.3 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 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. 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 ====== 4.1 The sampling procedures described are intended for use in the procurement of samples of hydraulic cement after it has been manufactured and is ready to be offered for sale. They are not intended as sampling procedures for quality control purposes during manufacturing. The testing procedures outlined cover the amount of testing to be done and provide guidance for reporting on conformance or non-conformance of cements with requirements of purchase specifications. 4.2 This practice is referenced as the procedure for sampling natural cement (Specification C10/C10M ), masonry cement (Specification C91/C91M ), portland cement (Specification C150/C150M ), blended hydraulic cement (Specification C595/C595M ), expansive hydraulic cement (Specification C845/C845M ), hydraulic cement based on a performance specification (Specification C1157/C1157M ), plastic stucco cement (Specification C1328/C1328M ), and mortar cement (Specification C1329/C1329M ), and 4.3 Most building codes and construction specifications require that hydraulic cement to be used in the work meet the applicable requirements of the relevant purchase specifications, such as Specifications C10/C10M , C91/C91M , C150/C150M , C595/C595M , C1157/C1157M , C1328/C1328M , C1329/C1329M , or C845/C845M . If the code or specification requires sampling of the manufactured cement, the provisions given in 4.4 are applicable. Not much cement is sold on the basis of such sampling and testing. A useful discussion of sampling and testing cement is contained in PRC-225. 4.4 The procedures covered in this practice should be done by or for purchasers of hydraulic cement who are using a code or specification that requires sampling and testing to determine if the samples conform to the relevant acceptance specifications. The testing is done using specified methods to determine whether the samples yield test results that conform to the specification, and the tests serve as a basis for acceptance or rejection of the lot of material sampled. 4.5 It is neither intended nor required that all cements be tested using all the test methods referenced in Section 2 .