1.1 本试验方法包括测定由符合规定要求的破碎颗粒组成的粗骨料样品的质量百分比或计数百分比。 1.2 以国际单位制表示的数值应视为标准。括号中的值仅供参考。 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。 1.4 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 一些规范包含与粗骨料中破碎颗粒百分比有关的要求。此类要求的一个目的是通过增加粘结或非粘结骨料混合物中的颗粒间摩擦来最大限度地提高剪切强度。另一个目的是为表面处理骨料提供稳定性，并为路面面层中使用的骨料提供更大的摩擦和纹理。本试验方法提供了一个标准程序，用于根据此类要求确定粗骨料的可接受性。 4.2 对于断裂颗粒上所需的断裂面数量，规范有所不同，对于是否应使用质量百分比或颗粒计数百分比，规范也有所不同。如果规范没有规定，则使用至少一个破裂面的标准并计算质量百分比。

1.1 This test method covers the determination of the percentage, by mass or by count, of a coarse aggregate sample that consists of fractured particles meeting specified requirements. 1.2 The values stated in SI units are to be regarded as the standard. The values in parentheses are provided for information only. 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. 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 ====== 4.1 Some specifications contain requirements relating to percentage of fractured particles in coarse aggregates. One purpose of such requirements is to maximize shear strength by increasing inter-particle friction in either bound or unbound aggregate mixtures. Another purpose is to provide stability for surface treatment aggregates and to provide increased friction and texture for aggregates used in pavement surface courses. This test method provides a standard procedure for determining the acceptability of coarse aggregate with respect to such requirements. 4.2 Specifications differ as to the number of fractured faces required on a fractured particle, and they also differ as to whether percentage by mass or percentage by particle count shall be used. If the specification does not specify, use the criterion of at least one fractured face and calculate percentage by mass.