1.1 这些试验方法包括测定所有类型的干燥或烧制耐火材料形状的冷挤压强度和断裂模量（MOR）。 1.2 测试方法如下所示: 试验方法 小节 冷挤压强度 4. 到 8. 断裂模量 9 到 13 1.3 以英寸磅为单位的数值应视为标准。括号中给出的值是国际单位制的数学转换，仅供参考，不被视为标准。 1.4 本标准并不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。 1.5 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====== 3.1 耐火材料的冷强度表明其适用于耐火材料结构。（这不是衡量高温下性能的指标。） 3.2 这些试验方法用于测定所有耐火材料产品的室温三点弯曲弯曲强度（冷断裂模量）或压缩强度（冷压碎强度），或两者兼而有之。 3.3 必须非常小心地比较冷挤压强度或断裂模量的不同测定结果。试样的尺寸和形状、试样表面的性质（即成型、锯切或研磨）、试验期间这些表面的方向、载荷几何形状和载荷施加速率都可能对获得的数值结果产生重大影响。如果这些参数中的一个或多个在两次测定之间不同，则不应对不同测定之间的结果进行比较。 3.4 最大晶粒尺寸与最小试样尺寸的相对比率可能会显著影响数值结果。例如，含有大颗粒的较小切割试样可能会与切割试样的砖块产生不同的结果。在任何情况下都不应该6 英寸乘1 英寸乘1 英寸（152 毫米乘25 毫米乘25 mm）试样，并对含有最大晶粒尺寸超过0.25英寸（6.4 mm）晶粒的材料进行测试。 3.5 该测试方法适用于研发、工程应用和设计、制造过程控制以及制定采购规范。

1.1 These test methods cover the determination of the cold crushing strength and the modulus of rupture (MOR) of dried or fired refractory shapes of all types. 1.2 The test methods appear in the following sections: Test Method Sections Cold Crushing Strength 4 to 8 Modulus of Rupture 9 to 13 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 The cold strength of a refractory material is an indication of its suitability for use in refractory construction. (It is not a measure of performance at elevated temperatures.) 3.2 These test methods are for determining the room temperature flexural strength in three-point bending (cold modulus of rupture) or compressive strength (cold crushing strength), or both, for all refractory products. 3.3 Considerable care must be used to compare the results of different determinations of the cold crushing strength or modulus of rupture. The specimen size and shape, the nature of the specimen faces (that is, as-formed, sawed, or ground), the orientation of those faces during testing, the loading geometry, and the rate of load application may all significantly affect the numerical results obtained. Comparisons of the results between different determinations should not be made if one or more of these parameters differ between the two determinations. 3.4 The relative ratio of the largest grain size to the smallest specimen dimension may significantly affect the numerical results. For example, smaller cut specimens containing large grains may present different results than the bricks from which they were cut. Under no circumstances should 6 in. by 1 in. by 1 in. (152 mm by 25 mm by 25 mm) specimens be prepared and tested for materials containing grains with a maximum grain dimension exceeding 0.25 in. (6.4 mm). 3.5 This test method is useful for research and development, engineering application and design, manufacturing process control, and for developing purchasing specifications.