1.1 这些试验方法包括耐火材料筛分分析的湿法和干法。 1.1.1 湿筛分析- 水促进粘土的熟化，有助于分离细颗粒，将其从较大的颗粒中清洗出来。建议将此方法用于需要加水的材料，以及在正常工业使用中发生熟化的材料。 1.1.2 干筛分析- 在确定较小粒径中存在的材料量方面，干法不如湿法有效。 建议使用( 1. )对于粘土，当水的消化作用不理想时( 2. )当材料以粗磨熟料和煅烧物的形式存在时，以及( 3. )当粘土的使用方式使最终粒径处于次要地位时。 1.2 这些试验方法还包括在潮湿条件下测定耐火材料的含水量和收到的风干样品的含水量，以便可以在干燥的基础上计算筛分分析。 包括一种获取其他耐火材料（如塑料耐火材料和湿混合料）含水量的方法。 1.3 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。 1.4 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。 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====== 3.1 粒度分布对大多数耐火材料性能有重大影响。这些试验方法提供了一种测量分布的方法，以便与预期分布进行比较。 3.2 这些试验方法还包括测定潮湿条件下耐火材料的含水量和收到的风干样品的含水量，以便可以在干燥的基础上计算筛分分析。 3.3 这些方法可以生成用于规范验收、设计目的、制造控制和研发的数据。 3.4 标准匹配或校准筛的参考集 4. 应提供用于检查样品实际筛分分析中使用的筛组。 用于筛分分析的筛也可以是标准匹配筛，也可以是符合规范中规范表的非匹配筛 E11 ，前提是此类筛子的结果相差不超过5 % 当根据试验方法章节对两组数据进行比较时，从参考数据集获得的数据 C429型 关于筛子和样品分离器的测试。

1.1 These test methods cover a wet and a dry method for sieve analysis of refractory materials. 1.1.1 Wet Sieve Analysis— Water promotes the slaking of clays and helps to separate fine particles, washing them from the larger grains. This method is recommended for use with materials that require water addition, and that slake in normal industrial use. 1.1.2 Dry Sieve Analysis— The dry method is not as effective as the wet method in determining the amount of material present in the smaller particle sizes. It is recommended ( 1 ) for clays, when the slaking action of water is undesirable, ( 2 ) when the material is in the form of coarsely ground grog and calcine, and ( 3 ) when the clay is to be used in such a way that the ultimate particle size is of secondary importance. 1.2 These test methods also cover determination of the water content of refractory materials in the wet condition and of air-dried samples as received, so that the sieve analysis can be calculated on the dry basis. Included is a method for obtaining the water content of other refractory materials, such as plastic refractories and wet mixes. 1.3 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. 1.4 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 ====== 3.1 Particle size distribution has a major effect upon most of the refractory properties. These test methods provide a means of measuring the distribution for the purpose of comparison to the desired distribution. 3.2 These test methods also cover determination of the water content of refractory materials in the wet condition and of air-dried samples received, so that the sieve analysis can be calculated on the dry basis. 3.3 These methods can produce data for specification acceptance, design purposes, manufacturing control, and research and development. 3.4 A reference set of standard matched or calibrated sieves 4 shall be provided for use in checking the set of sieves used in the actual sieve analysis of samples. The sieves for use in sieve analysis may also be standard matched sieves or may be unmatched sieves conforming to the Specification Table in Specification E11 , provided that such sieves will give results that differ by no more than 5 % from those obtained with the reference set when the two sets are compared in accordance with the section of Test Method C429 on testing of sieves and sample splitters.