ASTM C1384-23
(Specification)Standard Specification for Admixtures for Masonry Mortars
Standard Specification for Admixtures for Masonry Mortars
ABSTRACT
This specification pertains to admixtures for masonry mortars. Admixtures are substances other than the prescribed materials of water, aggregate, and cementitious materials that are used to improve one or more of the recognized desirable properties of conventional masonry mortar. Admixtures are classified by their effect on the performance characteristics of conventional masonry mortars. Admixed mortars are classified by their modified properties, as compared to a reference mortar. The following classifications are recognized: bond enhancer, workability enhancer, set accelerator, set retarder, and water repellent. The materials to be used include Portland cement, hydraulic cement, blended hydraulic cement, masonry cement, mortar cement, lime, and sand. Different test methods shall be implemented in order to determine the following properties: soluble chloride content, compressive strength, water retention, air content of plastic mortar, board life, time of setting, flexural bond strength, and rate of water absorption.
SCOPE
1.1 This specification pertains to admixtures for masonry mortars. Admixtures are substances other than Specification C270 prescribed materials of water, aggregate, and cementitious materials that are used to improve one or more of the recognized desirable properties of conventional masonry mortar.
1.2 This specification does not cover coloring pigments.
Note 1: Information on coloring pigments can be found in Specification C979/C979M.
1.3 This specification does not cover additives that are added to the cementitious materials during the manufacture of the cementitious materials.
1.4 Acceptance of an admixture is based on its performance in an admixed mortar. Acceptance of the admixed masonry mortar is based on attainment of performance either equivalent to that required for conventional mortar or improved performance of one or more indicated properties, while maintaining required performance levels for other properties.
1.5 The text of this standard refers to notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.
1.6 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
Note 2: The testing laboratory performing the test methods referenced in this specification should be evaluated in accordance with Practice C1093.
1.7 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: C1384 − 23
Standard Specification for
1
Admixtures for Masonry Mortars
This standard is issued under the fixed designation C1384; 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
2
1.1 This specification pertains to admixtures for masonry
2.1 ASTM Standards:
mortars. Admixtures are substances other than Specification
C144 Specification for Aggregate for Masonry Mortar
C270 prescribed materials of water, aggregate, and cementi-
C270 Specification for Mortar for Unit Masonry
tious materials that are used to improve one or more of the
C305 Practice for Mechanical Mixing of Hydraulic Cement
recognized desirable properties of conventional masonry mor-
Pastes and Mortars of Plastic Consistency
tar.
C403/C403M Test Method for Time of Setting of Concrete
1.2 This specification does not cover coloring pigments. Mixtures by Penetration Resistance
C723 Practice for Chemical-Resistant Resin Grouts for
NOTE 1—Information on coloring pigments can be found in Specifica-
3
Brick or Tile (Withdrawn 2021)
tion C979/C979M.
C780 Test Methods for Preconstruction and Construction
1.3 This specification does not cover additives that are
Evaluation of Mortars for Plain and Reinforced Unit
added to the cementitious materials during the manufacture of
Masonry
the cementitious materials.
C979/C979M Specification for Pigments for Integrally Col-
1.4 Acceptance of an admixture is based on its performance
ored Concrete
in an admixed mortar. Acceptance of the admixed masonry
C1072 Test Methods for Measurement of Masonry Flexural
mortar is based on attainment of performance either equivalent
Bond Strength
to that required for conventional mortar or improved perfor-
C1093 Practice for Accreditation of Testing Agencies for
mance of one or more indicated properties, while maintaining
Masonry
required performance levels for other properties.
C1152/C1152M Test Method for Acid-Soluble Chloride in
Mortar and Concrete
1.5 The text of this standard refers to notes and footnotes
that provide explanatory material. These notes and footnotes C1180 Terminology of Mortar and Grout for Unit Masonry
C1218/C1218M Test Method for Water-Soluble Chloride in
(excluding those in tables and figures) shall not be considered
as requirements of the standard. Mortar and Concrete
C1403 Test Method for Rate of Water Absorption of Ma-
1.6 The values stated in SI units are to be regarded as the
sonry Mortars
standard. The values given in parentheses are for information
C1437 Test Method for Flow of Hydraulic Cement Mortar
only.
NOTE 2—The testing laboratory performing the test methods referenced
3. Terminology
in this specification should be evaluated in accordance with Practice
C1093.
3.1 Terminology defined in Terminology C1180 shall apply
1.7 This international standard was developed in accor-
for this specification.
dance with internationally recognized principles on standard-
3.2 Definitions of Terms Specific to This Standard:
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom- 3.2.1 admixed mortar, n—masonry mortar that deviates
mendations issued by the World Trade Organization Technical from those combinations of materials recognized by Specifi-
Barriers to Trade (TBT) Committee. cation C270 in that it also contains an admixture.
1 2
This specification is under the jurisdiction of ASTM Committee C12 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Mortars and Grouts for Unit Masonry and is the direct responsibility of Subcom- contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
mittee C12.03 on Specifications for Mortars. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Dec. 1, 2023. Published December 2023. Originally the ASTM website.
ɛ1 3
approved in 1998. Last previous approved in 2018 as edition C1384 – 18 . DOI: The last approved version of this historical standard is referenced on
10.1520/C1384-23. www.astm.org.
*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 ----------------------
C1384 − 23
corrosion potential of masonry mortars toward embedded and attached
3.2.2 admixture, n—substance other than the Specification
materials. Nonethel
...
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.
´1
Designation: C1384 − 18 C1384 − 23
Standard Specification for
1
Admixtures for Masonry Mortars
This standard is issued under the fixed designation C1384; 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
ε NOTE—Annex reference corrections for Test Method C780 were editorially made in December 2018.
1. Scope*
1.1 This specification pertains to admixtures for masonry mortars. Admixtures are substances other than Specification C270
prescribed materials of water, aggregate, and cementitious materials that are used to improve one or more of the recognized
desirable properties of conventional masonry mortar.
1.2 This specification does not cover coloring pigments.
NOTE 1—Information on coloring pigments can be found in Specification C979/C979M.
1.3 This specification does not cover additives that are added to the cementitious materials during the manufacture of the
cementitious materials.
1.4 Acceptance of an admixture is based on its performance in an admixed mortar. Acceptance of the admixed masonry mortar
is based on attainment of performance either equivalent to that required for conventional mortar or improved performance of one
or more indicated properties, while maintaining required performance levels for other properties.
1.5 The text of this standard refers to notes and footnotes that provide explanatory material. These notes and footnotes (excluding
those in tables and figures) shall not be considered as requirements of the standard.
1.6 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
NOTE 2—The testing laboratory performing the test methods referenced in this specification should be evaluated in accordance with Practice C1093.
1.7 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:
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 C12.03
on Specifications for Mortars.
Current edition approved June 1, 2018Dec. 1, 2023. Published August 2018December 2023. Originally approved in 1998. Last previous approved in 20172018 as edition
ɛ1
C1384 – 17.C1384 – 18 . DOI: 10.1520/C1384-18E01.10.1520/C1384-23.
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
---------------------- Page: 1 ----------------------
C1384 − 23
C144 Specification for Aggregate for Masonry Mortar
C270 Specification for Mortar for Unit Masonry
C305 Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency
C403/C403M Test Method for Time of Setting of Concrete Mixtures by Penetration Resistance
3
C723 Practice for Chemical-Resistant Resin Grouts for Brick or Tile (Withdrawn 2021)
C780 Test Methods for Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry
C979/C979M Specification for Pigments for Integrally Colored Concrete
C1072 Test Methods for Measurement of Masonry Flexural Bond Strength
C1093 Practice for Accreditation of Testing Agencies for Masonry
C1152/C1152M Test Method for Acid-Soluble Chloride in Mortar and Concrete
C1180 Terminology of Mortar and Grout for Unit Masonry
C1218/C1218M Test Method for Water-Soluble Chloride in Mortar and Concrete
C1403 Test Method for Rate of Water Absorption of Masonry Mortars
C1437 Test Method for Flow of Hydraulic Cement Mortar
3. Terminology
3.1 Terminology defined in Terminology C1180 shall apply for this specification.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 admixed mortar, n—masonry mortar that deviates from those combinations of materials recognized by Specification C270
...
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