ASTM C862-02

Standard Practice for Preparing Refractory Concrete Specimens by Casting

SIGNIFICANCE AND USE
This practice is used to standardize mixing, mold conditions, placement and curing of refractory concrete specimens to be used for testing and evaluation under other test methods.  
This practice standardizes laboratory conditions for producing refractory concrete specimens to minimize laboratory-to-laboratory variation and does not attempt to duplicate the conditions of field installations.  
This practice can be used for the preparation of specimens used in referee testing.
SCOPE
1.1 This practice covers the mixing, casting and curing of monolithic refractory concrete specimens for use in further testing. It does not apply to monolithic castable refractories intended primarily for gunning applications.
1.2 The values given in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 Various specimen sizes are required for specific test methods. Refer to these test methods to determine the size and number of specimens, which will be required from the sample.
1.4 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

• Status: Historical
• Publication Date: 09-Nov-2002
• ICS: 81.080 - Refractories
• Technical Committee: C08 - Refractories
• Drafting Committee: C08.09 - Monolithics

Relations

• Replaces: ASTM C862-01 - Standard Practice for Preparing Refractory Concrete Specimens by Casting
• Effective Date: 10-Nov-2002
• Replaced By: ASTM C862-02(2008) - Standard Practice for Preparing Refractory Concrete Specimens by Casting
• Effective Date: 01-Mar-2008
• Referred By: ASTM C865-22 - Standard Practice for Firing Refractory Concrete Specimens
• Effective Date: 10-Nov-2002
• Referred By: ASTM C401-12(2022) - Standard Classification of Alumina and Alumina-Silicate Castable Refractories
• Effective Date: 10-Nov-2002
• Referred By: ASTM C16-03(2018) - Standard Test Method for Load Testing Refractory Shapes at High Temperatures
• Effective Date: 10-Nov-2002
• Referred By: ASTM C133-97(2021) - Standard Test Methods for Cold Crushing Strength and Modulus of Rupture of Refractories
• Effective Date: 10-Nov-2002
• Referred By: ASTM C1446-19 - Standard Test Method for Measuring Consistency of Self-Flowing Castable Refractories
• Effective Date: 10-Nov-2002
• Referred By: ASTM C417-21 - Standard Test Method for Thermal Conductivity of Unfired Monolithic Refractories
• Effective Date: 10-Nov-2002
• Referred By: ASTM C704/C704M-15(2022)e1 - Standard Test Method for Abrasion Resistance of Refractory Materials at Room Temperature
• Effective Date: 10-Nov-2002
• Referred By: ASTM C1656-13(2023) - Standard Guide for Measuring the Reactivity of Hydraulic Refractory Castables Using Exothermic Profile
• Effective Date: 10-Nov-2002

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
Designation:C 862–02
Standard Practice for
1
Preparing Refractory Concrete Specimens by Casting
This standard is issued under the fixed designation C 862; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 3.3 This practice can be used for the preparation of speci-
mens used in referee testing.
1.1 This practice covers the mixing, casting and curing of
monolithic refractory concrete specimens for use in further
4. Apparatus and Conditions
testing. It does not apply to monolithic castable refractories
4.1 LaboratoryConditions—Thelaboratoryambientshould
intended primarily for gunning applications.
be controlled between 70 and 80°F (20 and 27°C) and from 40
1.2 The values given in inch-pound units are to be regarded
to 60% relative humidity for preconditioning materials and
as the standard. The values given in parentheses are for
equipment, batching and mixing casting test specimens, strip-
information only.
ping molds, and testing specimens. Report laboratory tempera-
1.3 Various specimen sizes are required for specific test
ture and relative humidity with physical test results if other
methods. Refer to these test methods to determine the size and
than specified.
number of specimens, which will be required from the sample.
4.2 Balances—Appropriatelysizedscaleshavingasensitiv-
1.4 This standard does not purport to address all of the
ity of 0.2% of the related batch size.
safety concerns, if any, associated with its use. It is the
4.3 Castable Mixers—An electrically operated mechanical
responsibility of the user of this standard to establish appro-
4
mixer (Fig. 1) may be used for preparing castable batches for
priate safety and health practices and determine the applica-
3 3 3
1
casting specimens.A2-ft (56.6-dm ) mixing bowl or a 2 ⁄2-ft
bility of regulatory limitations prior to use.
3
(70.8-dm ) concrete mixer has sufficient capacity to mix about
3
2. Referenced Documents 1ft of refractory castable. The smallest batches required for
3
casting 1-in. (25-mm) square bars can be mixed in a 0.10-ft
2.1 ASTM Standards:
3
(2.83-dm ) bowl available with bench mixers. Size mixing
C133 Test Methods for Cold Crushing Strength and Modu-
2
bowl to contain from 50 to 75% volume loading with the dry
lus of Rupture of Refractories
batch.
C192 PracticeforMakingandCuringConcreteTestSpeci-
3
mens in the Laboratory
NOTE 1—Castable water requirement variation becomes more signifi-
cant as dry volume loadings drop below 40% because the water required
3. Significance and Use
to wet the bowl surfaces changes more rapidly with decreasing volume
loadings.
3.1 This practice is used to standardize mixing, mold
conditions, placement and curing of refractory concrete speci-
4.4 Gang Molds—Metal, two or more sets, as shown in
mens to be used for testing and evaluation under other test
Figs. 2 and 3, for casting specimens to the size required for
methods.
specific physical property testing (see Note 8). The front plate
3.2 This practice standardizes laboratory conditions for
of the mold illustrated is held in place by quick-release clamps
producing refractory concrete specimens to minimize
(50-lbf (222-N) pull exerted by each clamp) that permit
laboratory-to-laboratory variation and does not attempt to
emptyingthemoldbyreleasingtheclampsandtappingtheleft
duplicate the conditions of field installations.
endofthefrontplate,therebypartingalloftheseparatorplates
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and loosening the cast-test specimens.
1
ThispracticeisunderthejurisdictionofASTMCommitteeC08onRefractories
, and is the direct responsibility of Subcommittee C08.09 on Monolithic Refracto-
4
ries. Mixers having various capacities are available from the Hobart Manufacturing
Current edition approved Nov 10, 2002. Published June 2003. Originally Co., Troy, OH and have been found to be suitable for this purpose.
5
approved in 1977. Last previous edition approved in 2001 as C862–01. A list of materials and notes on construction of the 9-in. (230 mm) straight-
2
Annual Book of ASTM Standards, Vol 15.01. brick gang molds are available at a nominal charge from the Orton Refractory
3
Annual Book of ASTM Standards, Vol 04.02. Research Center, Westerville, Ohio.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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C862–02
4.5 Calipers—Suitable for measuring internal longitudinal
mold dimensions and subsequent specimen length size to the
nearest 0.01 in. (0.25 mm).
4.6 Mold Lubricant—Ei
...