ASTM C545-97(2022)

Standard Classification of Zircon Refractories

SIGNIFICANCE AND USE
3.1 The zircon content and bulk density of a zirconia-silica refractory material have important influences on chemical resistance and its satisfactory use in refractory applications. This classification is considered useful for purchase specifications and quality control.
SCOPE
1.1 This classification covers fired refractory brick and shapes consisting predominantly of zircon (ZrO2·SiO2) and containing, by chemical analysis, not less than 60 % zirconium oxide (ZrO2) and not less than 30 % silica (SiO2).  
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 international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-Aug-2022
• ICS: 81.080 - Refractories
• Technical Committee: C08 - Refractories
• Drafting Committee: C08.92 - The Joseph E. Kopanda Subcommittee for Editorial, Terminology and Classification

Relations

• Refers: ASTM C830-00(2011) - Standard Test Methods for Apparent Porosity, Liquid Absorption, Apparent Specific Gravity, and Bulk Density of Refractory Shapes by Vacuum Pressure
• Effective Date: 01-Jul-2011
• Refers: ASTM C830-00(2006) - Standard Test Methods for Apparent Porosity, Liquid Absorption, Apparent Specific Gravity, and Bulk Density of Refractory Shapes by Vacuum Pressure
• Effective Date: 01-Jun-2006
• Refers: ASTM C20-00(2005) - Standard Test Methods for Apparent Porosity, Water Absorption, Apparent Specific Gravity, and Bulk Density of Burned Refractory Brick and Shapes by Boiling Water
• Effective Date: 01-Dec-2005
• Refers: ASTM C20-00 - Standard Test Methods for Apparent Porosity, Water Absorption, Apparent Specific Gravity, and Bulk Density of Burned Refractory Brick and Shapes by Boiling Water
• Effective Date: 10-Apr-2000
• Refers: ASTM C830-00 - Standard Test Methods for Apparent Porosity, Liquid Absorption, Apparent Specific Gravity, and Bulk Density of Refractory Shapes by Vacuum Pressure
• Effective Date: 10-Apr-2000

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: C545 −97 (Reapproved 2022)
Standard Classification of
Zircon Refractories
This standard is issued under the fixed designation C545; 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.
of minerals and refractory materials which are available from the National
1. Scope
Institute of Standards and Technology and other appropriate sources.
1.1 This classification covers fired refractory brick and
shapes consisting predominantly of zircon (ZrO ·SiO ) and
2 2
3. Significance and Use
containing, by chemical analysis, not less than 60 % zirconium
3.1 The zircon content and bulk density of a zirconia-silica
oxide (ZrO ) and not less than 30 % silica (SiO ).
2 2
refractory material have important influences on chemical
1.2 The values stated in inch-pound units are to be regarded
resistance and its satisfactory use in refractory applications.
as standard. The values given in parentheses are mathematical
This classification is considered useful for purchase specifica-
conversions to SI units that are provided for information only
tions and quality control.
and are not considered standard.
1.3 This international standard was developed in accor-
4. Basis of Classification
dance with internationally recognized principles on standard-
4.1 Types:
ization established in the Decision on Principles for the
4.1.1 Type A (Regular)—Zircon refractories having a bulk
Development of International Standards, Guides and Recom- 3 3
density of less than 240 lb/ft (3.84 g/cm ).
mendations issued by the World Trade Organization Technical
4.1.2 Type B (Dense)—Zircon refractories having a bulk
Barriers to Trade (TBT) Committee. 3 3
density of 240 lb/ft (3.84 g/cm ) or more.
2. Referenced Documents
5. Test Methods
2.1 ASTM Standards:
5.1 The properties listed in this classification shall be
C20 Test Methods for Apparent Porosity, Water Absorption,
determined by the following ASTM methods:
Apparent Specific Gravity, and Bulk Density of Burned
5.1.1 Bulk Density—Test Methods C20 or C830.
Refractory Brick and Shapes by Boiling Water
5.1.2 Chemical Analysis—XRF and ICP.
C830 Test Methods for Apparent Porosity, Liquid
Absorption, Apparent Specific Gravity, and Bulk Density
6. Retests
of Refractory Shapes by Vacuum Pressure
6.1 Because of variables resulting from sampling and the
NOTE 1—Chemical analysis of refractory products is determined by a
lack of satisfactory reproducibility in tests conducted by
combination of X-ray fluor
...