1.1 本试验方法包括测定细骨料中有机杂质对砂浆强度的影响，使用试验方法表明其存在 C40/C40米 .对经洗涤和未经洗涤的细骨料制成的砂浆的抗压强度进行了比较。 1.2 以国际单位制或英寸磅单位表示的数值应单独视为标准。每个系统中规定的值可能不是完全相等的；因此，每个系统应独立使用。将两个系统的值合并可能导致不符合标准。有些数值只有国际单位制，因为在实践中没有使用英寸磅当量。 注1: 筛网尺寸由其在规范中的标准名称确定 第11页 括号中给出的替代名称仅供参考，不代表不同的标准筛尺寸 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. 1.4 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 该试验方法对于根据规范要求最终确定细骨料的可接受性具有重要意义 C33/C33米 关于有机杂质。 5.2 本试验方法适用于按照试验方法进行试验的样品 C40/C40米 ，已经产生了颜色比表1中列出的标准颜色更深的上清液 C40/C40米 （有机板3号、Gardner颜色标准14号、圆盘14号或制备的颜色溶液）。 5.3 许多规范规定了试验方法中产生深色的细骨料的验收 C40/C40米 试验，如果通过该试验方法进行的试验表明，用未洗涤细骨料制备的砂浆立方体的强度与用洗涤细骨料制成的砂浆立方体强度相当。

1.1 This test method covers the determination of the effect on mortar strength of the organic impurities in fine aggregate, whose presence is indicated using Test Method C40/C40M . Comparison is made between compressive strengths of mortar made with washed and unwashed fine aggregate. 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. Some values have only SI units because the inch-pound equivalents are not used in the practice. Note 1: Sieve size is identified by its standard designation in Specification E11 . The alternative designation given in parentheses is for information only and does not represent a different standard sieve size 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. ( Warning— Fresh hydraulic cementitous mixtures are caustic and may cause chemical burns to exposed skin and tissue upon prolonged exposure.) 2 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 This test method is of significance in making a final determination of the acceptability of fine aggregates with respect to the requirements of Specification C33/C33M concerning organic impurities. 5.2 This test method is applicable to those samples which, when tested in accordance with Test Method C40/C40M , have produced a supernatant liquid with a color darker than the standard listed in Table 1 of C40/C40M (Organic plate No. 3, Gardner Color Standard No. 14, Circular Disk No. 14 or prepared color solution). 5.3 Many specifications provide for the acceptance of fine aggregate producing a darker color in the Test Method C40/C40M test, if testing by this test method indicates the strength of the mortar cubes prepared with the unwashed fine aggregate is comparable to the strength of mortar cubes made with the washed fine aggregate.