ASTM C1790-21

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: C1790 −21
Standard Specification for
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Fly Ash Facing Brick
This standard is issued under the fixed designation C1790; 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* 2. Referenced Documents
1.1 This specification covers fly ash brick intended for use 2.1 ASTM Standards:
in masonry, which are made from fly ash, water, and suitable C33 Specification for Concrete Aggregates
mineral aggregates with or without the inclusion of other C140 Test Methods for Sampling and Testing Concrete
materials, and without the use of portland cement. This Masonry Units and Related Units
specification covers units intended for use in masonry, in both C331 Specification for LightweightAggregates for Concrete
structural and facing applications. Masonry Units
C426 Test Method for Linear Drying Shrinkage of Concrete
1.2 Units covered under this specification include a fly ash
Masonry Units
binder that undergoes hydraulic, pozzolanic, alkali-activated,
C618 Specification for Coal Fly Ash and Raw or Calcined
or geopolymer reactions, or any combination thereof. These
Natural Pozzolan for Use in Concrete
chemical reactions, in conjunction with the other materials in
C979 Specification for Pigments for Integrally Colored Con-
the units, provide the strength and durability necessary to meet
crete
the requirements of this specification.
C989 Specification for Slag Cement for Use in Concrete and
NOTE 1—This specification addresses properties of units formed using
Mortars
fly ash, aggregates, and other allowed binders. Although not required by
C1232 Terminology for Masonry
this standard, users may request tests that establish assembly performance
C1240 Specification for Silica Fume Used in Cementitious
such as unit-mortar bond and fire resistance.
Mixtures
1.3 This specification references notes and footnotes, which
C1645 Test Method for Freeze-thaw and De-icing Salt
provide explanatory material. These notes and footnotes (ex-
Durability of Solid Concrete Interlocking Paving Units
cluding those in tables and figures) shall not be considered as
requirements of the standard.
3. Terminology
1.4 The values stated in inch-pound units are to be regarded
3.1 TermsdefinedinTerminologyC1232shallapplyforthis
as standard. The values given in parentheses are mathematical
specification.
conversions to SI units that are provided for information only
3.2 Definitions of Terms Specific to This Standard:
and are not considered standard.
3.2.1 fly ash brick, n—a masonry unit made from fly ash,
1.5 This standard does not purport to address all of the
water, and suitable aggregates with or without the inclusion of
safety concerns, if any, associated with its use. It is the
other materials and specifically without the inclusion of port-
responsibility of the user of this standard to establish appro-
land cement.
priate safety, health, and environmental practices and deter-
4. Materials
mine the applicability of regulatory limitations prior to use.
1.6 This international standard was developed in accor-
4.1 Cementitious Materials—No portland cement shall be
dance with internationally recognized principles on standard-
used. Materials shall conform to the following applicable
ization established in the Decision on Principles for the
specifications:
Development of International Standards, Guides and Recom-
4.1.1 Pozzolans—Specification C618.
mendations issued by the World Trade Organization Technical
4.1.2 Slag Cement—Specification C989.
Barriers to Trade (TBT) Committee.
4.1.3 Silica Fume—Specification C1240.
4.2 Aggregates—Aggregates shall conform to the following
specifications, except for grading requirements:
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This test method is under the jurisdiction of ASTM Committee C15 on
4.2.1 Normal Weight Aggregates—Specification C33.
Manufactured Masonry Units and is the direct responsibility of Subcommittee
C15.03 on Concrete Masonry Units and Related Units. 4.2.2 Lightweight Aggregates—Specification C331.
Current edition approved June 1, 2021. Published June 2021. Originally
4.3 Pigments for Integrally Colored Concrete—
approved in 2014. Last previous edition approved in 2015 as C1790 – 15. DOI:
10.1520/C1790-21. Specification C979.
*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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C1790 − 21
TABLE 2 Maximum Permissible Varia
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