1.1 本试验方法包括含碳耐火材料在空气中高温下的断裂模量的测定。 1.2 以英寸-磅单位和华氏度表示的值应被视为标准值。括号中给出的值是对SI单位的数学转换，仅供参考，不被视为标准。 1.3 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。 有关具体危害陈述，请参见第节 5 . 1.4 本国际标准是根据世界贸易组织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贸易技术壁垒（TBT）委员会。 ======意义和用途====== 3.1 含碳耐火材料在高温下的断裂模量已被接受为质量控制测试和研究与开发中的有用测量。这些测量还用于确定特定产品对各种应用的适用性并制定规格。在测试过程中，样品可能会经历一些氧化。 3.2 1988年，对该试验程序进行了耐用性试验。研究了以下变量: 3.2.1 测试温度（2525（1385））与2575°F（1413°C））， 3.2.2 炉内空气气氛与氩气气氛， 3.2.3 破碎样品前的放置时间（12分钟对18分钟），以及 3.2.4 样品上的加载速率（175（778））与350 lb/min（1556 N/min））。3.3 在两个单独的耐用性测试中测试了焦化后含有约17%碳的树脂粘合镁碳砖。在第一次耐久性测试中测试无金属砖，而在第二次耐久性测试中测试含铝砖。在95%置信水平下分析结果。 3.4 对于无金属砖，氩气气氛的存在和保持时间对2550°F(1400°C)下的断裂模量具有统计上显著的影响。氩气气氛产生较低的断裂模量。在空气中测试的样品在外表面上具有良好烧结的脱碳区，这可能解释了较高的断裂模量。较长的保持时间导致无金属砖的较低结果。 3.5 对于含铝砖，测试温度、氩气气氛的存在和加载速率对2550°F（1400°C）下的断裂模量具有统计学显著影响。较高的测试温度增加了测量结果，氩气氛的存在降低了结果，而较高的负载率增加了结果。

1.1 This test method covers the determination of the modulus of rupture of carbon-containing refractories at elevated temperatures in air. 1.2 The values stated in inch-pound units and degrees Fahrenheit 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. For specific hazard statements, see Section 5 . 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 The modulus of rupture of carbon-containing refractories at elevated temperatures has become accepted as a useful measurement in quality control testing and in research and development. These measurements are also used to determine the suitability of particular products for various applications and to develop specifications. The sample may undergo some oxidation during the test. 3.2 In 1988, ruggedness testing was conducted on this test procedure. The following variables were studied: 3.2.1 Testing temperature (2525 (1385)) versus 2575 °F (1413 °C)), 3.2.2 Air atmosphere versus argon atmosphere in the furnace, 3.2.3 Hold time prior to breaking the sample (12 versus 18 min), and 3.2.4 Loading rate on the sample (175 (778)) versus 350 lb/min (1556 N/min)). 3.3 Resin-bonded magnesia-carbon brick containing approximately 17 % carbon after coking were tested in two separate ruggedness tests. Metal-free brick were tested in the first ruggedness test, while aluminum-containing brick were tested in the second. Results were analyzed at a 95 % confidence level. 3.4 For the metal-free brick, the presence of an argon atmosphere and hold time had statistically significant effects on the modulus of rupture at 2550 °F (1400 °C). The argon atmosphere yielded a lower modulus of rupture. The samples tested in air had a well-sintered decarburized zone on the exterior surfaces, possibly explaining the higher moduli of rupture. The longer hold time caused a lower result for the metal-free brick. 3.5 For the aluminum-containing brick, testing temperature, the presence of an argon atmosphere, and loading rate had statistically significant effects on the modulus of rupture at 2550 °F (1400 °C). The higher testing temperature increased the measured result, the presence of an argon atmosphere lowered the result, and the higher loading rate increased the result.