1.1 本试验方法包括测定耐火砖或整体耐火材料在氧化气氛中以及在以恒定速率增加的力或应力作用下的高温断裂模量。 1.2 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。 1.3 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 测量耐火材料在高温下的断裂模量已成为评估材料在使用温度下的性能的一种广泛接受的方法。许多消费品公司都有基于此类测试的规范。 3.2 本试验方法仅限于在氧化条件下运行的熔炉。然而，在对其他试验炉中的气氛控制进行修改后，可以在不改变的情况下使用本试验程序的主要标准。 3.3 本试验方法设计用于在具有中心点荷载的简支梁上逐渐施加力或应力。设计用于逐步施加应变的试验装置可能会产生不同的结果，特别是因为耐火材料在不适用胡克定律的高温下会达到半塑性状态，即应力与应变不成比例。 3.4 本试验方法适用于烧结致密耐火砖和型材、化学粘结砖和型材、由浇注料、塑料或捣打材料形成的型材，以及可形成所需试样尺寸的任何其他耐火材料。

1.1 This test method covers determination of the high-temperature modulus of rupture of refractory brick or monolithic refractories in an oxidizing atmosphere and under action of a force or stress that is increased at a constant rate. 1.2 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. 1.3 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 Measuring the modulus of rupture of refractories at elevated temperatures has become a widely accepted means to evaluate materials at service temperatures. Many consumer companies have specifications based on this type of test. 3.2 This test method is limited to furnaces operating under oxidizing conditions. However, with modifications for atmosphere control in other test furnaces, the major criteria of this test procedure may be employed without change. 3.3 This test method is designed for progressive application of a force or stress on a specimen supported as a simple beam with center-point loading. Test apparatus designed for the progressive application of a strain may yield different results, especially since refractory materials will reach a semiplastic state at elevated temperatures where Hooke's law does not apply, that is, stress is then not proportional to strain. 3.4 This test method applies to fired dense refractory brick and shapes, chemically bonded brick and shapes, shapes formed from castables, plastics, or ramming materials, and any other refractory that can be formed to the required specimen dimension.