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Standard Test Method for Modulus of Rupture of Carbon-Containing Refractory Materials at Elevated Temperatures
Automaticky přeložený název:
Standardní zkušební metoda pevnost v ohybu z Carbon obsahujících žáruvzdorných materiálů při zvýšených teplotách
NORMA vydána dne 1.10.2012
Označení normy: ASTM C1099-07(2012)
Poznámka: NEPLATNÁ
Datum vydání normy: 1.10.2012
Kód zboží: NS-9459
Počet stran: 3
Přibližná hmotnost: 9 g (0.02 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Keywords:
carbon-containing, modulus of rupture, refractories, strength, ICS Number Code 81.080 (Refractories)
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 where 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. |
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1. Scope | ||||||
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 and health practices and determine
the applicability of regulatory limitations prior to use.
Standard Test Method for Modulus of
Rupture of Refractory Materials at Elevated Temperatures ISO Recommendation 5013 Determination of the Hot Modulus of
Rupture of Shaped and Unshaped Dense and Insulating Refractory
Products Available from American National Standards Institute
(ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036,
http://www.ansi.org. Standard Test Method for Calibration of
Thermocouples By Comparison Techniques |
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