ASTM C476-23
(Specification)Standard Specification for Grout for Masonry
Standard Specification for Grout for Masonry
ABSTRACT
This specification covers two types of grout, fine and coarse grout, for use in the construction of masonry structures. Grout is specified by proportions or strength requirements. Materials used as ingredients in grout shall conform to the requirements specified such as: cementitious materials; blended cements; quicklime; hydrated lime; coal fly ash or raw calcine natural pozzolan; granulated blast furnace slag; air-entraining admixtures; aggregates; water; pumping aids; antifreeze compounds; and storage of materials. Fine grout shall be manufactured with fine aggregates. Coarse grout shall be manufactured with a combination of coarse and fine aggregates. Proportions of ingredients shall be determined by grout proportion requirements and by the specified compressive strength. Materials for grout shall be measured in such a way that the required proportions of the grout materials are controlled and accurately measured. Grout shall be produced using one of the following procedures: grout materials mixed with water at the job site and ready-mixed grout transported to the job site.
SCOPE
1.1 This specification covers two types of grout, fine and coarse grout, for use in the construction of masonry structures. Each type (fine and coarse) is further classified as conventional grout (requiring mechanical consolidation by puddling or vibration when placed) and self-consolidating grout (not requiring mechanical consolidation when placed). Conventional grout is specified by (1) proportions or (2) strength requirements. Self-consolidating grout is specified by strength requirements.
1.2 The text of this specification references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of this specification.
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.
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: C476 − 23
Standard Specification for
1
Grout for Masonry
This standard is issued under the fixed designation C476; 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* C150/C150M Specification for Portland Cement
C207 Specification for Hydrated Lime for Masonry Pur-
1.1 This specification covers two types of grout, fine and
poses
coarse grout, for use in the construction of masonry structures.
C260/C260M Specification for Air-Entraining Admixtures
Each type (fine and coarse) is further classified as conventional
for Concrete
grout (requiring mechanical consolidation by puddling or
C404 Specification for Aggregates for Masonry Grout
vibration when placed) and self-consolidating grout (not re-
C494/C494M Specification for Chemical Admixtures for
quiring mechanical consolidation when placed). Conventional
Concrete
grout is specified by (1) proportions or (2) strength require-
C595/C595M Specification for Blended Hydraulic Cements
ments. Self-consolidating grout is specified by strength re-
C618 Specification for Coal Fly Ash and Raw or Calcined
quirements.
Natural Pozzolan for Use in Concrete
1.2 The text of this specification references notes and
C989/C989M Specification for Slag Cement for Use in
footnotes that provide explanatory material. These notes and
Concrete and Mortars
footnotes (excluding those in tables and figures) shall not be
C1019 Test Method for Sampling and Testing Grout for
considered as requirements of this specification.
Masonry
C1157/C1157M Performance Specification for Hydraulic
1.3 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical Cement
C1602/C1602M Specification for Mixing Water Used in the
conversions to SI units that are provided for information only
and are not considered standard. Production of Hydraulic Cement Concrete
C1611/C1611M Test Method for Slump Flow of Self-
1.4 This international standard was developed in accor-
Consolidating Concrete
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
3. Materials
Development of International Standards, Guides and Recom-
3.1 Materials used as ingredients in grout shall conform to
mendations issued by the World Trade Organization Technical
the requirements specified in 3.1.1 – 3.1.5.
Barriers to Trade (TBT) Committee.
3.1.1 Cementitious Materials—Cementitious materials shall
2. Referenced Documents conform to one of the following specifications:
2 3.1.1.1 Portland Cement—Type I, IA, II, IIA, III, and IIIA
2.1 ASTM Standards:
of Specification C150/C150M.
C5 Specification for Quicklime for Structural Purposes
3.1.1.2 Blended Cements—Type IL, IS(<70), IP, IT(S<70),
C29/C29M Test Method for Bulk Density (“Unit Weight”)
or blended cements with special properties designated by (A),
and Voids in Aggregate
(MS), or (HS), or a combination of (A) and (MS) or (HS), as
C143/C143M Test Method for Slump of Hydraulic-Cement
appropriate, of Specification C595/C595M.
Concrete
3.1.1.3 Hydraulic Cements—Types GU, HE, MS, or HS of
Specification C1157/C1157M.
1
This specification is under the jurisdiction of ASTM Committee C12 on
3.1.1.4 Quicklime—Specification C5.
Mortars and Grouts for Unit Masonry and is the direct responsibility of Subcom-
3.1.1.5 Hydrated Lime—Type S of Specification C207.
mittee C12.05 on Grout & Grout Admixtures for Masonry.
3.1.1.6 Coal Fly Ash or Raw Calcined Natural Pozzolan—
Current edition approved Feb. 1, 2023. Published February 2023. Originally
Specification C618. Grouts produced with blends of cement
approved in 1961. Last previous edition approved in 2022 as C476 – 22. DOI:
10.1520/C0476-23.
and fly ash or raw calcined natural pozzolan shall have the
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
compressive strength specified (4.2.1.2 or 4.2.2.1).
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3.1.1.7 Granulated Blast Furnace Slag—Specification
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. C989/C989M. Grouts produced with blends of cement and
*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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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: C476 − 22 C476 − 23
Standard Specification for
1
Grout for Masonry
This standard is issued under the fixed designation C476; 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 two types of grout, fine and coarse grout, for use in the construction of masonry structures. Each type
(fine and coarse) is further classified as conventional grout (requiring mechanical consolidation by puddling or vibration when
placed) and self-consolidating grout (not requiring mechanical consolidation when placed). Conventional grout is specified by (1)
proportions or (2) strength requirements. Self-consolidating grout is specified by strength requirements.
1.2 The text of this specification references notes and footnotes that provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered as requirements of this specification.
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.
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:
C5 Specification for Quicklime for Structural Purposes
C29/C29M Test Method for Bulk Density (“Unit Weight”) and Voids in Aggregate
C143/C143M Test Method for Slump of Hydraulic-Cement Concrete
C150/C150M Specification for Portland Cement
C207 Specification for Hydrated Lime for Masonry Purposes
C260/C260M Specification for Air-Entraining Admixtures for Concrete
C404 Specification for Aggregates for Masonry Grout
C494/C494M Specification for Chemical Admixtures for Concrete
C595/C595M Specification for Blended Hydraulic Cements
C618 Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete
C989/C989M Specification for Slag Cement for Use in Concrete and Mortars
C1019 Test Method for Sampling and Testing Grout for Masonry
1
This specification is under the jurisdiction of ASTM Committee C12 on Mortars and Grouts for Unit Masonry and is the direct responsibility of Subcommittee C12.05
on Grout & Grout Admixtures for Masonry.
Current edition approved Sept. 1, 2022Feb. 1, 2023. Published September 2022February 2023. Originally approved in 1961. Last previous edition approved in 20202022
as C476 – 20.C476 – 22. DOI: 10.1520/C0476-22.10.1520/C0476-23.
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
1
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C476 − 23
C1157/C1157M Performance Specification for Hydraulic Cement
C1602/C1602M Specification for Mixing Water Used in the Production of Hydraulic Cement Concrete
C1611/C1611M Test Method for Slump Flow of Self-Consolidating Concrete
3. Materials
3.1 Materials used as ingredients in grout shall conform to the requirements specified in 3.1.1 – 3.1.5.
3.1.1 Cementitious Materials—Cementitious materials shall conform to one of the following specifications:
3.1.1.1 Portland Cement—Type I, IA, II, IIA, III, and IIIA of Specification C150/C150M.
3.1.1.2 Blended Cements—Type IL, IS(<70), IP, IT(S<70), or blended cements with special properties designated by (A), (MS),
or (HS), or a combination of (A) and (MS) or (HS), as appropriate, of Specification C595/C595M.
3.1.1.3 Hydraulic Cements—Types GU, HE, MS, or HS of Specification C1157/C1157M.
3.1.1.4 Quicklime—Specification C5.
3.1.1.5 Hydrated Lime—Type S of Specification C207.
3.1.1.6 Coal Fly Ash or Raw Calcined Natural Pozzolan—Specification C618. Addition rates shall be in an amount gover
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