ASTM C212-21

Standard Specification for Structural Clay Facing Tile

ABSTRACT
This specification covers structural clay load-bearing facing tile. Structural facing tile are tile designed for use in interior and exterior unplastered walls and partitions of buildings. Two classes of structural clay facing tile are covered: standard - tile suitable for general use in exterior or interior masonry walls and partitions, and special duty - tile suitable for general use in exterior or interior masonry walls and partitions, and designed to have superior resistance to impact and moisture transmission and to support greater lateral and compressive loads than standard tile construction. Two types of structural clay facing tile are covered: type FTX - smooth-face tile suitable for general use in exposed exterior and interior masonry walls and partitions, and type FTS - smooth- or rough texture face tile suitable for general use in exposed exterior and interior masonry walls and partitions. The tile shall conform to one of the requirements for water absorption of the type specified as prescribed. The tile shall conform to the requirements for compressive strength of the class specified as prescribed. The tile shall be of the sizes and shapes specified. Requirements as to coring shall apply to multicored tile only. The compressive strength and absorption by 1-h boiling shall be tested to meet the requirements prescribed.
SCOPE
1.1 This specification covers structural clay loadbearing facing tile. Structural facing tile are tile designed for use in interior and exterior unplastered walls and partitions of buildings.  
1.2 The property requirements of this specification apply at the time of purchase. The use of results from testing of tile extracted from masonry structures for determining conformance or nonconformance to the property requirements (Section 6) of this standard is beyond the scope of this specification.  
1.3 Tile covered by this specification are manufactured from clay, shale, or similar naturally occurring substances and subjected to a heat treatment at elevated temperatures (firing). The heat treatment must develop sufficient fired bond between the particulate constituents to provide the strength and durability requirements of this specification. (See firing and fired bond in Terminology C1232.)  
1.4 The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification.  
1.5 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.  
1.6 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: Historical
• Publication Date: 31-May-2021
• ICS: 81.080 - Refractories
• Technical Committee: C15 - Manufactured Masonry Units
• Drafting Committee: C15.02 - Brick and Structural Clay Tile

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:C212 −21
Standard Specification for
1
Structural Clay Facing Tile
This standard is issued under the fixed designation C212; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* 2. Referenced Documents
2
1.1 This specification covers structural clay loadbearing 2.1 ASTM Standards:
facing tile. Structural facing tile are tile designed for use in C67 Test Methods for Sampling and Testing Brick and
interior and exterior unplastered walls and partitions of build- Structural Clay Tile
ings. C1232 Terminology for Masonry
1.2 The property requirements of this specification apply at
3. Terminology
the time of purchase. The use of results from testing of tile
3.1 Definitions—For definitions relating to structural clay
extracted from masonry structures for determining confor-
facing tile, refer to Terminology C1232.
mance or nonconformance to the property requirements (Sec-
tion6)ofthisstandardisbeyondthescopeofthisspecification.
4. Classification
1.3 Tilecoveredbythisspecificationaremanufacturedfrom
4.1 Two types of structural clay facing tile are covered, as
clay, shale, or similar naturally occurring substances and
follows:
subjected to a heat treatment at elevated temperatures (firing).
4.1.1 Type FTX—Smooth-face tile suitable for general use
The heat treatment must develop sufficient fired bond between
in exposed exterior and interior masonry walls and partitions,
the particulate constituents to provide the strength and dura-
and adapted for use where tile low in absorption, easily
bility requirements of this specification. (See firing and fired
cleaned,andresistanttostainingarerequired,andwhereahigh
bond in Terminology C1232.)
degree of mechanical perfection, narrow color range, and
1.4 The text of this specification references notes and
minimum variation in face dimensions are desired.
footnotes which provide explanatory material. These notes and
4.1.2 Type FTS—Smooth- or rough-texture face tile suitable
footnotes (excluding those in tables and figures) shall not be
for general use in exposed exterior and interior masonry walls
considered as requirements of the specification.
and partitions and adapted for use where tile of moderate
1.5 The values stated in inch-pound units are to be regarded absorption, moderate variation in face dimensions, and me-
as standard. The values given in parentheses are mathematical dium color range are permitted, and where minor defects in
conversions to SI units that are provided for information only surface finish, including small handling chips, are not objec-
and are not considered standard. tionable. Two-face tile having one smooth face and one
rough-texture face are included in this type.
1.6 This international standard was developed in accor-
dance with internationally recognized principles on standard-
4.2 Two classes of structural clay facing tile are covered, as
ization established in the Decision on Principles for the
follows:
Development of International Standards, Guides and Recom-
4.2.1 Standard—Tile suitable for general use in exterior or
mendations issued by the World Trade Organization Technical
interior masonry walls and partitions.
Barriers to Trade (TBT) Committee.
4.2.2 Special Duty—Tile suitable for general use in exterior
or interior masonry walls and partitions, and designed to have
1
This specification is under the jurisdiction of ASTM Committee C15 on
Manufactured Masonry Units and is the direct responsibility of Subcommittee
2
C15.02 on Brick and Structural Clay Tile. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved June 1, 2021. Published June 2021. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1946. Last previous edition approved in 2020 as C212–20. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/C0212-21. the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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C212−21
TABLE 2 Compressive Strength Based on Gross Area
superior resistance to impact and moisture transmission and to
support greater lateral and compressive loads than standard tile End-Construction Tile Side-Construction Tile
Minimum
construction.
Minimum Average Individual Individual
Class Average of
of Five Tests, psi Minimum, psi Minimum, psi
Five Tests,
...

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.
Designation: C212 − 20 C212 − 21
Standard Specification for
1
Structural Clay Facing Tile
This standard is issued under the fixed designation C212; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
1.1 This specification covers structural clay loadbearing facing tile. Structural facing tile are tile designed for use in interior and
exterior unplastered walls and partitions of buildings.
1.2 The property requirements of this specification apply at the time of purchase. The use of results from testing of tile extracted
from masonry structures for determining conformance or nonconformance to the property requirements (Section 6) of this standard
is beyond the scope of this specification.
1.3 Tile covered by this specification are manufactured from clay, shale, or similar naturally occurring substances and subjected
to a heat treatment at elevated temperatures (firing). The heat treatment must develop sufficient fired bond between the particulate
constituents to provide the strength and durability requirements of this specification. (See firing and fired bond in Terminology
C1232.)
1.4 The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered as requirements of the specification.
1.5 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.
1.6 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.
2. Referenced Documents
2
2.1 ASTM Standards:
C67 Test Methods for Sampling and Testing Brick and Structural Clay Tile
C1232 Terminology for Masonry
3. Terminology
3.1 Definitions—For definitions relating to structural clay facing tile, refer to Terminology C1232.
1
This specification is under the jurisdiction of ASTM Committee C15 on Manufactured Masonry Units and is the direct responsibility of Subcommittee C15.02 on Brick
and Structural Clay Tile.
Current edition approved Jan. 1, 2020June 1, 2021. Published January 2020June 2021. Originally approved in 1946. Last previous edition approved in 20172020 as
C212–17.–20. DOI: 10.1520/C0212-20.10.1520/C0212-21.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C212 − 21
4. Classification
4.1 Two types of structural clay facing tile are covered, as follows:
4.1.1 Type FTX—Smooth-face tile suitable for general use in exposed exterior and interior masonry walls and partitions, and
adapted for use where tile low in absorption, easily cleaned, and resistant to staining are required, and where a high degree of
mechanical perfection, narrow color range, and minimum variation in face dimensions are desired.
4.1.2 Type FTS—Smooth- or rough-texture face tile suitable for general use in exposed exterior and interior masonry walls and
partitions and adapted for use where tile of moderate absorption, moderate variation in face dimensions, and medium color range
are permitted, and where minor defects in surface finish, including small handling chips, are not objectionable. Two-face tile having
one smooth face and one rough-texture face are included in this type.
4.2 Two classes of structural clay facing tile are covered, as follows:
4.2.1 Standard—Tile suitable for general use in exterior or interior masonry walls and partitions.
4.2.2 Special Duty—Tile suitable for general use in exterior or interior masonry walls and partitions, and designed to have supe
...