ASTM C129-23

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: C129 − 23
Standard Specification for
1
Nonloadbearing Concrete Masonry Units
This standard is issued under the fixed designation C129; 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* C90 Specification for Loadbearing Concrete Masonry Units
C140/C140M Test Methods for Sampling and Testing Con-
1.1 This specification covers hollow and solid nonloadbear-
crete Masonry Units and Related Units
ing concrete masonry units made from portland cement, water,
C150/C150M Specification for Portland Cement
and mineral aggregates with or without the inclusion of other
C331/C331M Specification for Lightweight Aggregates for
materials. These units are intended for use in nonloadbearing
Concrete Masonry Units
partitions, but under certain conditions they may be suitable for
C426 Test Method for Linear Drying Shrinkage of Concrete
use in nonloadbearing exterior walls above grade where
Masonry Units
effectively protected from the weather.
C595/C595M Specification for Blended Hydraulic Cements
1.2 The text of this standard references notes and footnotes
C618 Specification for Coal Ash and Raw or Calcined
that provide explanatory material. These notes and footnotes
Natural Pozzolan for Use in Concrete
(excluding those in tables and figures) shall not be considered
C979/C979M Specification for Pigments for Integrally Col-
as requirements of the standard.
ored Concrete
C989/C989M Specification for Slag Cement for Use in
1.3 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical Concrete and Mortars
C1240 Specification for Silica Fume Used in Cementitious
conversions to SI units that are provided for information only
and are not considered standard. Mixtures
NOTE 1—Concrete masonry units covered by this specification are C1157/C1157M Performance Specification for Hydraulic
made from lightweight or normal weight aggregates, or both.
Cement
NOTE 2—When particular features are desired, such as density
C1232 Terminology for Masonry
classification, surface texture for appearance or bond, finish, color, fire
resistance, insulation, acoustical properties, or other special features, such
3. Terminology
properties should be specified separately by the purchaser. However,
suppliers should be consulted as to the availability of units having the
3.1 Terminology defined in Terminology C1232 shall apply
desired features.
for this specification.
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
4. Classification
ization established in the Decision on Principles for the
4.1 Nonloadbearing concrete masonry units manufactured
Development of International Standards, Guides and Recom-
in accordance with this specification shall conform to one of
mendations issued by the World Trade Organization Technical
three density classifications prescribed in Table 1.
Barriers to Trade (TBT) Committee.
2. Referenced Documents
5. Materials and Manufacture
2
2.1 ASTM Standards:
5.1 Cementitious Materials—Cementitious materials shall
C33/C33M Specification for Concrete Aggregates
conform to the following applicable specifications:
5.1.1 Portland Cement—Specification C150/C150M.
1
This specification is under the jurisdiction of ASTM Committee C15 on
5.1.2 Modified Portland Cement—Portland cement con-
Manufactured Masonry Units and is the direct responsibility of Subcommittee
forming to Specification C150/C150M, modified as follows:
C15.03 on Concrete Masonry Units and Related Units.
(1) Limestone—If calcium carbonate is added to the
Current edition approved Dec. 1, 2023. Published December 2023. Originally
cement, the CaCO content shall not be less than 85 %.
approved in 1937. Last previous edition approved in 2022 as C129 – 22. DOI:
3
10.1520/C0129-23.
(2) Limitation on Insoluble Residue—1.5 %.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
(3) Limitation on Air Content of Mortar—Volume percent,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
22 % max.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. (4) Limitation on Loss on Ignition—7 %.
*A Summary of Changes section appears at the end of this standard
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