1.1 本试验方法包括通过干燥骨料的表面水分和孔隙中的水分来测定骨料样品中的可蒸发水分百分比。一些骨料可能含有与骨料中矿物化学结合的水。此类水不可蒸发，不包括在本试验方法测定的百分比中。 1.2 以国际单位制表示的数值应视为标准。本标准不包括其他计量单位。 注1: 筛孔尺寸由规范中的标准名称确定 E11 . 括号中给出的替代名称仅供参考，并不代表不同的标准筛孔尺寸。 1.3 本标准的文本引用了提供解释材料的注释和脚注。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。 有关具体预防说明，请参阅 5.3.1 , 7.2.1 和 7.3.1 . 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====== 4.1 该测试方法对于通常目的而言足够准确，例如调整混凝土配料的批次数量。通常情况下，其测量试样中的水分比制备代表骨料供应的试样更可靠。如果骨料本身因受热而发生变化，或需要更精确的测量，则应使用通风、可控温度的烘箱进行试验。 4.2 粗骨料的大颗粒，尤其是大于50 mm的颗粒，将需要更长的时间使水分从颗粒内部传播到表面。本试验方法的使用者应通过试验确定快速干燥方法在干燥大尺寸颗粒时是否为预期用途提供足够的精度。

1.1 This test method covers the determination of the percentage of evaporable moisture in a sample of aggregate by drying both surface moisture and moisture in the pores of the aggregate. Some aggregate may contain water that is chemically combined with the minerals in the aggregate. Such water is not evaporable and is not included in the percentage determined by this test method. 1.2 The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard. 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 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of this 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. For specific precautionary statements, see 5.3.1 , 7.2.1 , and 7.3.1 . 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 This test method is sufficiently accurate for usual purposes, such as adjusting batch quantities of ingredients for concrete. It will generally measure the moisture in the test sample more reliably than the sample can be made to represent the aggregate supply. In cases where the aggregate itself is altered by heat, or where more refined measurement is required, the test should be conducted using a ventilated, controlled temperature oven. 4.2 Large particles of coarse aggregate, especially those larger than 50 mm, will require greater time for the moisture to travel from the interior of the particle to the surface. The user of this test method should determine by trial if rapid drying methods provide sufficient accuracy for the intended use when drying large size particles.