ASTM C1384-18
(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 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.
1.6 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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Designation:C1384 −18
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
Mixtures by Penetration Resistance
1.2 This specification does not cover coloring pigments.
C723 Practice for Chemical-Resistant Resin Grouts for
NOTE 1—Information on coloring pigments can be found in Specifica-
Brick or Tile
tion C979/C979M.
C780 Test Method 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-
ored Concrete
1.4 Acceptance of an admixture is based on its performance
C1072 Test Methods for Measurement of Masonry Flexural
in an admixed mortar. Acceptance of the admixed masonry
Bond Strength
mortar is based on attainment of performance either equivalent
C1093 Practice for Accreditation of Testing Agencies for
to that required for conventional mortar or improved perfor-
Masonry
mance of one or more indicated properties, while maintaining
C1152/C1152M Test Method for Acid-Soluble Chloride in
required performance levels for other properties.
Mortar and Concrete
1.5 The values stated in SI units are to be regarded as the
C1180 Terminology of Mortar and Grout for Unit Masonry
standard. The values given in parentheses are for information
C1218/C1218M Test Method for Water-Soluble Chloride in
only.
Mortar and Concrete
NOTE 2—The testing laboratory performing the test methods referenced
C1403 Test Method for Rate of Water Absorption of Ma-
in this specification should be evaluated in accordance with Practice
sonry Mortars
C1093.
C1437 Test Method for Flow of Hydraulic Cement Mortar
1.6 This international standard was developed in accor-
dance with internationally recognized principles on standard-
3. Terminology
ization established in the Decision on Principles for the
3.1 Terminology defined in Terminology C1180 shall apply
Development of International Standards, Guides and Recom-
for this specification.
mendations issued by the World Trade Organization Technical
3.2 Definitions of Terms Specific to This Standard:
Barriers to Trade (TBT) Committee.
3.2.1 admixed mortar, n—masonry mortar that deviates
from those combinations of materials recognized by Specifi-
cation C270 in that it also contains an admixture.
1
This specification is under the jurisdiction of ASTM Committee C12 on
Mortars and Grouts for Unit Masonry and is the direct responsibility of Subcom-
2
mittee C12.03 on Specifications for Mortars. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved June 1, 2018. Published August 2018. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1998. Last previous approved in 2017 as edition C1384 – 17. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/C1384-18. 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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C1384−18
corrosion potential of masonry mortars toward embedded and attached
3.2.2 admixture, n—substance other than the Specification
materials. Nonetheless, the admixture shall not be offered for sale if the
C270 prescribed materials of water, aggregate, and cementi-
manufacturer has evidence that the admixture does react adversely with
tiousmaterialsthatisaddedtoamasonrymortartomodifyone
embedded or attached materials common to masonry.
or more properties of the conventional masonry mortar.
6.2 At the maximum recommended dosage, the mortar
3.2.3 bond enhancer, n—admixture used to increase the
admixture shall add not more than 65 ppm (
...
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: C1384 − 17 C1384 − 18
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*
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 C979C979/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 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.
1.6 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:
C91 Specification for Masonry Cement
C144 Specification for Aggregate for Masonry Mortar
C150 Specification for Portland Cement
C207 Specification for Hydrated Lime for Masonry Purposes
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
C595 Specification for Blended Hydraulic Cements
C723 Practice for Chemical-Resistant Resin Grouts for Brick or Tile
C778 Specification for Standard Sand
C780 Test Method for Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry
C979C979/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
C1157 Performance Specification for Hydraulic Cement
C1180 Terminology of Mortar and Grout for Unit 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 C12.03
on Specifications for Mortars.
Current edition approved Dec. 1, 2017June 1, 2018. Published January 2018August 2018. Originally approved in 1998. Last previous approved in 20122017 as edition
C1384 – 12a.C1384 – 17. DOI: 10.1520/C1384-17.10.1520/C1384-18.
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 − 18
C1218/C1218M Test Method for Water-Soluble Chloride in Mortar and Concrete
C1329 Specification for Mortar Cement
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
in that it also contains an admix
...
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