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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Thank you for interesting in our services. We are a non-profit group that run this website to share documents. We need your help to maintenance this website. Please help us to share our service with your friends. A number in parentheses indicates the year of last reapproval. This test method can also be applied to astn refractories see Metric Dimensions, Practice C and Practice C and plastic refractories see Practice C The zstm stated c074 each system may not be exact equivalents; therefore, use each system independently of the other.
Combining values from the two systems may result in nonconformance with the standard. Several values are stated only in SI units as a matter of convention and to permit comparison of results.
Included are the abrading media weight gramsspecimen weight gramsspecimen weight loss due to abrasion gramsand the resultant volume loss cubic centimeters. 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 aatm.
Current edition approved March 1, Originally approved in Abrasion Tester 1 dwg 3 3.
Summary of Test Method 3. Significance and Use 4. Interferences Factors known to Affect Results 5. Several factors were found to cause statistically significant effects on measured results see Section Ideal glass tube 3 Detailed prints for the construction of the test chamber are available at a nominal cost from ASTM International Headquarters. An acceptable test chamber can be made from a weatherproof electrical switch box.
Glass tube lots purchased as 7 mm outside diameter tube with a f704 1. For the ruggedness test, flint glass tube inside diameters of 4. Take the statistically significant effect of this small tube inside diameter variation into consideration.
Individually measure and choose all nozzle tubes to conform to a specified 4.
Air pressure as specified in this test method is kPa [65 psi] measured by a gauge capable to 6 6. For the ruggedness test, air pressure was maintained at values of kPa [64 psi] and kPa [66 psi] by the use of a calibrated master series pressure gauge. Take the statistically significant effect of this small air pressure variation into consideration and use only gauges as specified in 6. It is also recommended that air gauges be recalibrated at frequent intervals.
Other sand blast gun models or types may affect test results. When the Carco Blast Gun is used, this will replace the steel nozzle supplied with the gun. Cleanly cut the ends of the glass tube and do not fire polish them. Check the length and diameter of each tube prior to use. The diameter may be checked by the use of a gage consisting of a tapered stainless steel rod with the 4. Flare the tubing at one end to sit snugly inside a 9. This sleeve is glued or soldered in place inside the 9.
Your comments will receive careful consideration at a meeting of the responsible technical committee,1 which you may attend. The glass tube is placed through the sleeve in the tubing nut, compressing the grommet within the nut.
The nut is attached to the gun. Fit the nozzle tightly into the grommet in order to achieve adequate vacuum see 8. The glass tube is then positioned at a distance of 2 mm [0. This is done by using a brass rod, 4. This will allow the operator to push the glass tubing up until the rod touches the venturi, ensuring a 2 mm [0.
Inspect the air generator nozzle for wear before any test series and replace as necessary. Check the inside diameter periodically for wear Fig. The use of appropriate drying equipment is necessary in order to achieve consistent results. Ensure that the air supply is able to supply an adequate volume of air such that the air pressure does not fluctuate during the test run.
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. Consultation with an industrial professional in compressed air systems is recommended in setting up the air supply for the abrasion tester.
Dial to have a mirrored band for knife-edged pointer tip reflection to prevent parallax error. The minimum recommended diameter for dial type is mm [4. Verify the sizing of the grit by either user confirmation of the screen analysis or a certificate of conformance from the supplier.
Take care to avoid segregation in large containers of abrading media. 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. The feed funnel contains a suitable orifice to obtain a flow time of 6 15 s while delivering g of abrading media into the gun supply funnel.
Provide an air gap between the orifice and the gun supply funnel to allow secondary air cc704 enter with the abrading media.
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
Connect the vacuum gauge to a T-fitting in the abrasive supply line. Used for weighing the abrading media and test specimens. Typically a to g capacity balance is required. Only the most abrasion resistant materials can be 25 mm [1 in. Fire specimens to the anticipated service temperature or a higher temperature, if specified, in accordance with Practice C One by mm 4 by 4 in.
Determine the volume of the specimens by measurement of length, width, and thickness to the nearest 0. For brick samples test an unbranded surface. For monolithic refractory specimens, test the surface that is, top free face or bottom mold face that most accurately reflects the actual field situation. Normally, the free surface is the most appropriate test surface. Position the specimen such that the abrasion pattern is centered on the surface of the plate. Regulate the air pressure to kPa [65 psi].
Check the air pressure before and after the abrading media is run through the system. If the vacuum gauge does not show a minimum vacuum of mm 15 in.
Do not completely fill or flood the gun supply funnel with material. When connected with the abrasion tester, ensure that the feed mechanism delivers the abrading media in c074 specified time of 6 15 s. If the samples are allowed to sit before being weighed, they cc704 pick up moisture resulting in an inaccurate test result. In this case, dry the sample as in 8.
Calculation and Report 9. Report the results as a hole through the xstm. Precision and Bias 5 Five different types of refractories, along with a float glass plate standard, were tested for abrasion resistance by each laboratory. 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. All specimens were 4. Prior to testing, bulk density and sonic velocity were measured on all specimens to ensure uniformity.
Specimens were then randomly selected for distribution to the participating laboratories. Two 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.
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.
Highly Abrasion Resistant Materials S1. Follow all requirements of the supplement. No interference statements can be made at this time. If the readings on the gauges differ by more than 6. Use one gauge as the primary gauge; all pressure measurements are to be taken from that gauge. The second gauge is used only for verification.
Ensure that there are not any flow obstructions between the gauge and the gun. Ensure that the main atsm funnel has sufficient volume to hold the required g of silicon carbide abrading medium. Provide an orifice approximately 4. Size the orifice so that g of the abrading media flows through the funnel in 6 15 s.
Equip the gun supply funnel with a 4. Provide a gap atm the two funnels to allow for air to be introduced to the particle stream. Connect the lower funnel to the feed inlet of the blast gun with clear flexible poly vinyl chloride tubing with an inside diameter of 6.
Attach the blast gun to the top of the chamber through the hole in the top and secure it in place with a nut. Ensure the gun is perpendicular to the wstm.