ASTM C903-15e1
(Practice)Standard Practice for Preparing Refractory Specimens by Cold Gunning
Standard Practice for Preparing Refractory Specimens by Cold Gunning
SIGNIFICANCE AND USE
3.1 The properties of refractories can be affected by their method of installation. This practice attempts to minimize the variables encountered during installation by pneumatic gunning.
3.2 This practice provides parameters to produce gunned specimens for use in other ASTM test methods.
3.3 This practice may be used to produce specimens for acceptance testing, service evaluation, manufacturing control, and research and development.
3.4 Differences between various kinds of equipment and the differences in procedures and operator techniques may result in significant variations in the physical properties of the gunned specimens. It is recommended that the same operator use the same equipment to produce specimens for referee testing agreed to by the involved testing parties. The specific operating parameters should be shown in the report.
3.5 Although this practice is specifically designed for refractories containing calcium aluminate cement, it may be used with minor modifications for gun mixes containing other bond systems.
SCOPE
1.1 This practice covers a procedure for preparing refractory specimens usually containing calcium aluminate cement with or without metal fibers by cold nozzle-mix gunning. Specimens prepared in accordance with this practice are intended for use in standard ASTM test methods required for evaluating gunned materials.
1.2 The values stated in inch-pound units 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 and health practices and determine the applicability of regulatory limitations prior to use.
General Information
Buy Standard
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
´1
Designation: C903 − 15
Standard Practice for
1
Preparing Refractory Specimens by Cold Gunning
This standard is issued under the fixed designation C903; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1
ε NOTE—Editorial changes were made throughout in April 2016.
1. Scope 3.3 This practice may be used to produce specimens for
acceptance testing, service evaluation, manufacturing control,
1.1 Thispracticecoversaprocedureforpreparingrefractory
and research and development.
specimens usually containing calcium aluminate cement with
3.4 Differences between various kinds of equipment and the
orwithoutmetalfibersbycoldnozzle-mixgunning.Specimens
differences in procedures and operator techniques may result in
prepared in accordance with this practice are intended for use
significant variations in the physical properties of the gunned
in standardASTM test methods required for evaluating gunned
specimens. It is recommended that the same operator use the
materials.
same equipment to produce specimens for referee testing
1.2 The values stated in inch-pound units are to be regarded
agreed to by the involved testing parties.The specific operating
as standard. The values given in parentheses are mathematical
parameters should be shown in the report.
conversions to SI units that are provided for information only
3.5 Although this practice is specifically designed for re-
and are not considered standard.
fractories containing calcium aluminate cement, it may be used
1.3 This standard does not purport to address all of the
with minor modifications for gun mixes containing other bond
safety concerns, if any, associated with its use. It is the
systems.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
4. Apparatus
bility of regulatory limitations prior to use.
4.1 Gun, pneumatic nozzle-mix. At least 50 ft (15.2 m) of
hose should be available. Acceptable nozzle diameters range
2. Referenced Documents
from 1 to 2 in. (25 to 51 mm).
2
2.1 ASTM Standards:
4.2 Air Compressor, capable of delivering sufficient pres-
C401 Classification of Alumina and Alumina-Silicate
sure and volume to adequately move refractory to the gun. The
3 3
Castable Refractories
compressorshouldbeabletosupplyatleast250ft (7m )/min.
C865 Practice for Firing Refractory Concrete Specimens
4.3 Forms, suitable nonabsorbent type, which will vary in
size in accordance with the number and size of samples being
3. Significance and Use
prepared, but are at minimum 12 by 12 by 4 in. (305 by 305 by
3.1 The properties of refractories can be affected by their 100 mm). Forms should be sized to prevent rebound entrap-
1
method of installation. This practice attempts to minimize the ment. The use of ⁄2 inch hardware cloth as sidewalls of the
variables encountered during installation by pneumatic gun- form allows most of the rebound to pass through.
ning.
5. Procedure
3.2 This practice provides parameters to produce gunned
5.1 Store the refractory to be gunned at 70 to 85°F (20 to
specimens for use in other ASTM test methods.
27°C) for 24 h prior to gunning.
5.2 Place the form against a rigid surface at an angle of 80
to 90° to the horizontal.
1
ThispracticeisunderthejurisdictionofASTMCommitteeC08onRefractories
and is the direct responsibility of Subcommittee C08.09 on Monolithics.
5.3 If recommended by the supplier, predampen the refrac-
Current edition approved Oct. 1, 2015. Published December 2015. Originally
tory by mixing with potable water in a paddle mixer for 1 to 5
approved in 1979. Last previous edition approved in 2010 as C903 – 10. DOI:
min or follow manufacturer’s specific instructions. In general,
10.1520/C0903-15E01.
2
regular (dense) refractories require 2 to 4 % of predampening
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
water and lightweight (insulating) refractories require 5 to 8 %.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. NOTE 1—Refractories that contain a high-purity cement may benefit by
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
´1
C903 − 15
aging for 5 to 10 min after dampening before gunning. This “aging’’
5.7 Cut suitably sized lamination-free specimens from the
procedure should be used if gunning without it produces excessive
central section. If excessive tearout of refractory grain oc
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
´1
Designation: C903 − 15 C903 − 15
Standard Practice for
1
Preparing Refractory Specimens by Cold Gunning
This standard is issued under the fixed designation C903; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1
ε NOTE—Editorial changes were made throughout in April 2016.
1. Scope
1.1 This practice covers a procedure for preparing refractory specimens usually containing calcium aluminate cement with or
without metal fibers by cold nozzle-mix gunning. Specimens prepared in accordance with this practice are intended for use in
standard ASTM test methods required for evaluating gunned materials.
1.2 The values stated in inch-pound units 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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
C401 Classification of Alumina and Alumina-Silicate Castable Refractories
C865 Practice for Firing Refractory Concrete Specimens
3. Significance and Use
3.1 The properties of refractories can be affected by their method of installation. This practice attempts to minimize the variables
encountered during installation by pneumatic gunning.
3.2 This practice provides parameters to produce gunned specimens for use in other ASTM test methods.
3.3 This practice may be used to produce specimens for acceptance testing, service evaluation, manufacturing control, and
research and development.
3.4 Differences between various kinds of equipment and the differences in procedures and operator techniques may result in
significant variations in the physical properties of the gunned specimens. It is recommended that the same operator use the same
equipment to produce specimens for referee testing agreed to by the involved testing parties. The specific operating parameters
should be shown in the report.
3.5 Although this practice is specifically designed for refractories containing calcium aluminate cement, it may be used with
minor modifications for gun mixes containing other bond systems.
4. Apparatus
4.1 Gun, pneumatic nozzle-mix. At least 50 ft (15.2 m) of hose should be available. Acceptable nozzle diameters range from
1 to 2 in. (25 to 51 mm).
4.2 Air Compressor, capable of delivering sufficient pressure and volume to adequately move castablerefractory to the gun. The
3 3
compressor should be able to supply at least 250 ft (7 m )/min.
1
This practice is under the jurisdiction of ASTM Committee C08 on Refractories and is the direct responsibility of Subcommittee C08.09 on Monolithics.
Current edition approved Oct. 1, 2015. Published December 2015. Originally approved in 1979. Last previous edition approved in 2010 as C903 – 10. DOI:
10.1520/C0903-15.10.1520/C0903-15E01.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
´1
C903 − 15
4.3 Forms, suitable nonabsorbent type, which will vary in size in accordance with the number and size of samples being
prepared, but are at minimum 12 by 12 by 4 in. (305 by 305 by 100 mm). Forms should be sized to prevent rebound entrapment.
1
The use of ⁄2 inch hardware cloth as sidewalls of the form allows most of the rebound to pass through.
5. Procedure
5.1 Store the castablerefractory to be gunned at 70 to 85°F (20 to 27°C) for 24 h prior to gunning.
5.2 Place the form against a rigid surface at an angle of 80 to 90° to the horizontal.
5.3 If recommended by the supplier, predampen the refractory by mixing with potable water in a paddle mixer for 1 to 5 min
or follow manufacturer’s specific instructions. In general, regular (dense) castablesrefractories require 2 to 4 % of predampening
water and lightweight (insulati
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.