ASTM C1634-23
(Specification)Standard Specification for Concrete Facing Brick and Other Concrete Masonry Facing Units
Standard Specification for Concrete Facing Brick and Other Concrete Masonry Facing Units
ABSTRACT
This specification covers solid, dry-cast, concrete facing brick intended for interior and exterior use in constructing structural and facing masonry components and are made from portland cement, water, and suitable mineral aggregates with or without the inclusion of other materials. Concrete facing bricks shall be grouped into density classifications as either lightweight, medium weight, or normal weight. Specimens shall be sampled, tested, and conform accordingly to the specified physical requirements (oven-dry density, maximum water absorption, and minimum net area compressive strength) suitable for their density classification.
SCOPE
1.1 This specification covers solid, dry-cast, concrete facing brick and other solid concrete masonry facing units intended for interior and exterior use in constructing structural and facing masonry components and are made from portland cement, water, and suitable mineral aggregates with or without the inclusion of other materials.
Note 1: Specification C55 addresses concrete building brick used in non-facing, utilitarian applications (previously referred to in earlier editions of Specification C55 as Grade S—for general use where moderate strength and resistance to frost action and moisture penetration are required). This specification differs from Specification C55 in that it includes expanded consideration for properties of concrete units used in facing applications and other exposures (previously referred to in earlier editions of Specification C55 as Grade N—for use as architectural veneer and facing units in exterior walls and for use where high strength and resistance to moisture penetration and severe frost action are desired).
1.2 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 standard.
1.3 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.
Note 2: Concrete facing brick and other solid concrete masonry facing units covered by this specification are made from lightweight or normal weight aggregates, or both.
Note 3: When particular features are desired, such as density classification, high compressive strength, surface textures for appearance or bond, finish, color, fire resistance, insulation, acoustical properties, or other special features, such properties should be specified separately by the purchaser. Suppliers should be consulted as to the availability of concrete facing brick and other concrete masonry facing units having the desired features.
1.4 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.
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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:C1634 −23
Standard Specification for
Concrete Facing Brick and Other Concrete Masonry Facing
1
Units
This standard is issued under the fixed designation C1634; 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. Scope* ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
1.1 This specification covers solid, dry-cast, concrete facing
mendations issued by the World Trade Organization Technical
brick and other solid concrete masonry facing units intended
Barriers to Trade (TBT) Committee.
for interior and exterior use in constructing structural and
facing masonry components and are made from portland
2. Referenced Documents
cement, water, and suitable mineral aggregates with or without
2
2.1 ASTM Standards:
the inclusion of other materials.
C33/C33M Specification for Concrete Aggregates
NOTE 1—Specification C55 addresses concrete building brick used in
C55 Specification for Concrete Building Brick
non-facing, utilitarian applications (previously referred to in earlier
C140/C140M Test Methods for Sampling and Testing Con-
editionsofSpecificationC55asGradeS—forgeneralusewheremoderate
crete Masonry Units and Related Units
strength and resistance to frost action and moisture penetration are
C150/C150M Specification for Portland Cement
required). This specification differs from Specification C55 in that it
includes expanded consideration for properties of concrete units used in
C331/C331M Specification for Lightweight Aggregates for
facing applications and other exposures (previously referred to in earlier
Concrete Masonry Units
editions of Specification C55 as Grade N—for use as architectural veneer
C426 Test Method for Linear Drying Shrinkage of Concrete
and facing units in exterior walls and for use where high strength and
Masonry Units
resistance to moisture penetration and severe frost action are desired).
C595/C595M Specification for Blended Hydraulic Cements
1.2 The text of this specification references notes and
C618 Specification for Coal Fly Ash and Raw or Calcined
footnotes which provide explanatory material. These notes and
Natural Pozzolan for Use in Concrete
footnotes (excluding those in tables and figures) shall not be
C979/C979M Specification for Pigments for Integrally Col-
considered as requirements of the standard.
ored Concrete
1.3 The values stated in inch-pound units are to be regarded
C989/C989M Specification for Slag Cement for Use in
as standard. The values given in parentheses are mathematical
Concrete and Mortars
conversions to SI units that are provided for information only
C1157/C1157M Performance Specification for Hydraulic
and are not considered standard.
Cement
C1232 Terminology for Masonry
NOTE2—Concretefacingbrickandothersolidconcretemasonryfacing
C1240 Specification for Silica Fume Used in Cementitious
units covered by this specification are made from lightweight or normal
weight aggregates, or both.
Mixtures
NOTE 3—When particular features are desired, such as density
classification, high compressive strength, surface textures for appearance
3. Terminology
or bond, finish, color, fire resistance, insulation, acoustical properties, or
3.1 Terminology defined in Terminology C1232 shall apply
other special features, such properties should be specified separately by
the purchaser. Suppliers should be consulted as to the availability of for this specification.
concrete facing brick and other concrete masonry facing units having the
3.2 Definitions of Terms Specific to This Standard:
desired features.
3.2.1 concrete building brick, n—a concrete masonry unit,
1.4 This international standard was developed in accor-
with a maximum width of four (4) inches and of a weight that
dance with internationally recognized principles on standard-
will typically permit it to be lifted and placed with one hand,
that is manufactured for general use in non-facing, utilitarian
applications.
1
This specification is under the jurisdiction of ASTM Committee C15 on
Manufactured Masonry Units and is the direct responsibility of Subcommittee
2
C15.03 on Concrete Masonry Units and Related Units. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Jan. 1, 2023. Published January 2023. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2006. Last previous edition approved in 2020 as C1634 – 20. DOI: Standards volum
...
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: C1634 − 20 C1634 − 23
Standard Specification for
Concrete Facing Brick and Other Concrete Masonry Facing
1
Units
This standard is issued under the fixed designation C1634; 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. Scope*
1.1 This specification covers solid, dry-cast, concrete facing brick and other solid concrete masonry facing units intended for
interior and exterior use in constructing structural and facing masonry components and are made from portland cement, water, and
suitable mineral aggregates with or without the inclusion of other materials.
NOTE 1—Specification C55 addresses concrete building brick used in non-facing, utilitarian applications (previously referred to in earlier editions of
Specification C55 as Grade S—for general use where moderate strength and resistance to frost action and moisture penetration are required). This
specification differs from Specification C55 in that it includes expanded consideration for properties of concrete units used in facing applications and other
exposures (previously referred to in earlier editions of Specification C55 as Grade N—for use as architectural veneer and facing units in exterior walls
and for use where high strength and resistance to moisture penetration and severe frost action are desired).
1.2 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 standard.
1.3 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.
NOTE 2—Concrete facing brick and other solid concrete masonry facing units covered by this specification are made from lightweight or normal weight
aggregates, or both.
NOTE 3—When particular features are desired, such as density classification, high compressive strength, surface textures for appearance or bond, finish,
color, fire resistance, insulation, acoustical properties, or other special features, such properties should be specified separately by the purchaser. Suppliers
should be consulted as to the availability of concrete facing brick and other concrete masonry facing units having the desired features.
1.4 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:
C33/C33M Specification for Concrete Aggregates
1
This specification is under the jurisdiction of ASTM Committee C15 on Manufactured Masonry Units and is the direct responsibility of Subcommittee C15.03 on
Concrete Masonry Units and Related Units.
Current edition approved Dec. 1, 2020Jan. 1, 2023. Published December 2020January 2023. Originally approved in 2006. Last previous edition approved in 20172020
as C1634 – 17.C1634 – 20. DOI: 10.1520/C1634-20.10.1520/C1634-23.
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.
*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
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C1634 − 23
C55 Specification for Concrete Building Brick
C140/C140M Test Methods for Sampling and Testing Concrete Masonry Units and Related Units
C150/C150M Specification for Portland Cement
C331/C331M Specification for Lightweight Aggregates for Concrete Masonry Units
C426 Test Method for Linear Drying Shrinkage of Concrete Masonry Units
C595/C595M Specification for Blended Hydraulic Cements
C618 Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete
C979/C979M Specification for Pigments for Integrally Colored Concrete
C989/C989M Specification for Slag Cement for Use in Concrete and Mortars
C1157
...
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