1.1 本试验方法涵盖了测定粒状耐火材料体积密度的程序，这些商业产品的颗粒通常保留在0.265 in。（6.7 mm）或更粗的筛。 注1: 本试验方法不适用于在沸水中水合的材料。 1.2 单位- 以英寸-磅为单位的数值应视为标准值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.2.1 例外情况- 分段 4. , 7. 和 8. ，所用仪器仅以国际单位制提供。 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====== 3.1 粒状耐火材料可以是用于制造成品耐火产品的耐火颗粒原料，也可以是销售给耐火材料消费者的散装粒状耐火材料，无论是否经过一定程度的加工，以用于各种用途。在这两种情况下，表征粒状耐火材料的特性对于评估其质量或质量一致性以及确定最终用途的适用性至关重要。其中一个重要特性是体积密度，因为它与最终产品质量、使用和性能有关。 3.2 耐火材料生产商可将本试验方法用作其制造或开采的耐火颗粒原料的质量控制试验之一，或用于评估潜在的耐火颗粒原料。 3.3 对于耐火材料消费者而言，本试验方法的主要用途是评估消费者使用的外购耐火混合料或散装粒状耐火材料中颗粒材料的质量或质量一致性。 3.4 这是一种主要的测试方法，因此适用于规范、质量控制和研发。它还可以作为采购合同或协议中的仲裁测试方法，并作为开发更快速、二次测试方法的基础，用于制造耐火材料的质量控制。 3.5 本试验方法固有的基本假设是，样品通常代表材料，样品的粒径在试验方法规定的范围内，材料不易水合，材料中孔隙的大小和数量允许去除表面水，而无需从孔隙本身排水。 偏离任何这些假设都会否定测试结果的有用性。 3.6 在解释本试验方法的结果时，必须认识到材料的比重和孔隙度会影响获得的体积密度值。因此，只能在类似材料之间或在充分认识到被比较材料之间固有差异的情况下对结果进行比较。

1.1 This test method covers a procedure for determining the bulk density of granular refractory materials, commercial products which usually have particles that are retained on a 0.265 in. (6.7 mm) or coarser sieve. Note 1: This test method is not suitable for materials that hydrate in boiling water. 1.2 Units— The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.2.1 Exceptions— In Sections 4 , 7 , and 8 , the apparatus used is only available in SI units. 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 ====== 3.1 Granular refractory materials may be either refractory grain raw materials that are used in the manufacture of finished refractory products, or bulk granular refractory materials that are sold, with or without some degree of processing, to refractory consumers for various uses. In either case, characterizing the properties of a granular refractory material is essential in evaluating its quality or consistency of quality and in determining suitability for end use. One of the important properties is bulk density because of its relationship to end product quality, usage, and performance. 3.2 The refractories producer can use this test method as one of the quality control tests for his manufactured or mined refractory grain raw materials or for evaluating potential refractory grain raw materials. 3.3 For the refractories consumer, the principal use of this test method is in the evaluation of the quality or the consistency of quality of the granular material in purchased refractory mixes or in bulk granular refractory materials used by the consumer. 3.4 This is a primary test method, and thus is suitable for use in specifications, quality control, and research and development. It can also serve as a referee test method in purchasing contracts or agreements and as a base for development of more rapid, secondary test methods for use in quality control on manufactured refractory raw materials. 3.5 Fundamental assumptions inherent in this test method are that the sample is representative of the material in general, the particle size of the sample is within the range specified by the test method, the material is not readily hydratable, and the size and quantity of pores in the material permits removal of surface water without drainage from the pores themselves. Deviation from any of these assumptions negates the usefulness of the test results. 3.6 In interpreting the results of this test method, it must be recognized that the specific gravity of the material as well as the porosity affects the value obtained for bulk density. Thus, comparisons of results should only be made between like materials or with full recognition of inherent differences between the materials being compared.