1.1 本试验方法包括在空气中高温下测定含碳耐火材料的断裂模量。 1.2 以英寸-磅单位和华氏度表示的数值应视为标准值。括号中给出的值仅供参考。 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。 有关具体的危险说明，请参阅第节 5. . 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 含碳耐火材料在高温下的断裂模量已被公认为质量控制测试和研发中的有用测量方法。这些测量还用于确定特定产品对各种应用的适用性，并制定规范。在试验过程中，样品可能会发生一些氧化。 3.2 1988年，对该测试程序进行了耐久性测试。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 样品破碎前的保持时间（12对18 最小值），以及 3.2.4 样品上的加载速率（175（778）与350 磅/分钟（1556牛顿/分钟））。 3.3 树脂粘结镁碳砖，含约17 % 在两个单独的耐用性测试中测试了结焦后的碳。在第一次耐久性试验中测试了无金属砖，而铝- 在第二次试验中对含砖进行了测试。结果以95%进行分析 % 信心水平。 3.4 对于无金属砖，氩气气氛的存在和保持时间对2550时的断裂模量有统计显著影响 华氏度（1400 °C）。氩气气氛产生了较低的断裂模量。在空气中测试的样品外表面有一个烧结良好的脱碳区，这可能解释了较高的断裂模量。保持时间越长，无金属砖的结果越低。 3.5 对于含铝砖，试验温度、氩气气氛的存在和加载速率对2550时的断裂模量有统计显著影响 华氏度（1400 °C）。较高的测试温度会增加测量结果，氩气气氛的存在会降低结果，较高的加载速率会增加结果。

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 for information only. 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.