This standard is issued under the fixed designation C ; the number immediately 1 This test method is under the jurisdiction of ASTM Committee C08 on. Abrasion Resistance of Refractory Materials at Room Temperature1 This standard is issued under the fixed designation C/CM; the number immediately. ASTM C – Download as PDF File .pdf), Text File .txt) or read online. ASTM C
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V704 test results that do not differ by more than the repeatability interval shall be considered to be from the same population; conversely, two test results that do differ by more than the repeatability interval shall be considered to be from different populations.
The minimum recommended diameter for dial type is mm [4. Provide a gap between the two funnels to allow for air to be introduced to the particle stream. Cleanly cut the ends of the glass tube and do not fire polish them. Alternate dust handling systems such as venting to the outside are acceptable as long as the chamber pressure is maintained at the desired level.
ASTM C – Free Download PDF
Replace any parts as necessary and calibrate the abrasion tester in accordance with Section 7 before proceeding. Inspect the air generator nozzle for wear before any test series and replace as necessary. An acceptable test chamber can be made from a weatherproof electrical switch box. Several values are stated only in SI units as a matter of convention and to permit comparison of results.
Take care to avoid segregation in large containers of abrading media. Regulate the air pressure to the pressure indicated by the most recent calibration of the abrasion tester. Atm the lower funnel to the c7004 inlet of the blast gun with clear flexible poly vinyl chloride tubing with an inside diameter of 6.
c7704 It is the c7004 of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. This is done by using a brass rod, 4. Do not completely fill or flood the gun supply funnel with material.
Replace any components that are worn prior to calibration. Axtm number in parentheses indicates the year of last reapproval. 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.
Two test results that do not differ by more than the reproducibility interval shall be considered to be from the same population; conversely, two test results that do differ by more than the reproducibility interval shall be considered to be from different populations. Ensure that the main supply funnel has sufficient volume to hold the required g of silicon carbide abrading medium.
D704 values from the two systems may result in non-conformance with the standard. Maintain the mm 8 in. If the air supply is also connected to other equipment, ensure that the air supply is able to maintain consistent pressure throughout the test run, even when other equipment connected to the supply is operated.
Other sand blast gun models or types may affect test results.
The glass plate may be placed in the abrasion tester with either face up. Provide an orifice approximately 4.
Observe the abrasion pattern of the glass ast, through the edge of the plate. Refer to Table 2 for the acceptable precision statistics for float glass plate. Glass tube lots purchased as 7 mm outside diameter tube with a v704 1. Fit the nozzle tightly into the grommet in order to achieve adequate vacuum see 8. We are a non-profit group that run this website to share documents. For brick samples test an unbranded surface. For the ruggedness test, air pressure was maintained at values of kPa [64 psi] and kPa [66 psi] by asmt use of a calibrated master series pressure gauge.
After the air pressure to the gun and the chamber pressure have been adjusted, plug the abrading media feed line by closing the asgm of the lower funnel. The five types of refractories were a high-alumina brick, a silica brick, an abrasion-resistant castable, a super-duty fire brick, and a conventional high-cement castable. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
This sleeve is glued or soldered in place inside the 9. This log may be kept either on paper or electronically. Five different types of refractories, along with a float glass plate standard, were tested for abrasion resistance by each laboratory. All specimens were 4. For monolithic refractory specimens, test the surface that is, top free face or bottom mold face that most accurately asm the actual field situation.
Interferences Factors known c04 Affect Results 5. Take the statistically significant effect of this small air pressure variation into consideration and use only gauges as specified in 6. Provide an air gap between the orifice and the gun supply funnel to allow secondary air to enter with the abrading media.
Prior to testing, bulk density and sonic velocity were measured on all specimens to ensure uniformity. Normally, the free surface is the most appropriate test surface. No precision and bias statements can be made at this time. Several factors were found to cause statistically significant effects on measured results c70 Section Splitting possibly with use of a riffler or another similar procedure and reblending may be necessary to obtain a grit sample conforming to the required screen analysis.
Only the most abrasion resistant materials can be 25 mm [1 in. Position the specimen such that the abrasion pattern is centered on the surface of the plate.
The feed funnel contains a suitable orifice to astmm a flow time of 6 15 s while delivering g of abrading media into the gun supply funnel. Current edition approved March 1, If the readings on the gauges differ by more than 6. Turn on the air pressure. Dial to have a mirrored band for knife-edged pointer tip reflection to prevent parallax error.