ASTM C1260-22
(Test Method)Standard Test Method for Potential Alkali Reactivity of Aggregates (Mortar-Bar Method)
Standard Test Method for Potential Alkali Reactivity of Aggregates (Mortar-Bar Method)
SIGNIFICANCE AND USE
4.1 This test method provides a means of detecting the potential of an aggregate intended for use in concrete for undergoing alkali-silica reaction resulting in potentially deleterious internal expansion. It is based on the NBRI Accelerated Test Method (1-4).3 It is especially useful for aggregates that react slowly or produce expansion late in the reaction. However, it does not evaluate combinations of aggregates with cementitious materials nor are the test conditions representative of those encountered by concrete in service.
4.2 Because the specimens are exposed to a NaOH solution, the alkali content of the cement is not a significant factor in affecting expansions.
4.3 Results of tests conducted on an aggregate as described herein should form a part of the basis for a decision as to whether precautions should be taken against excessive expansion due to alkali-silica reaction. Refer to Guide C1778 for the interpretation of the test results from Test Method C1260.
SCOPE
1.1 This test method permits detection, within 16 days, of the potential for deleterious alkali-silica reaction of aggregate in mortar bars.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. When this test method refers to combined-unit standards, the selection of the measurement systems is at the user’s discretion.
1.3 The text of this test method 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 this test method.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. A specific precautionary statement is given in the section on Reagents.
1.5 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: C1260 − 22
Standard Test Method for
Potential Alkali Reactivity of Aggregates (Mortar-Bar
1
Method)
This standard is issued under the fixed designation C1260; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* C125Terminology Relating to Concrete and Concrete Ag-
gregates
1.1 This test method permits detection, within 16 days, of
C127Test Method for Relative Density (Specific Gravity)
the potential for deleterious alkali-silica reaction of aggregate
and Absorption of Coarse Aggregate
in mortar bars.
C128Test Method for Relative Density (Specific Gravity)
1.2 The values stated in SI units are to be regarded as
and Absorption of Fine Aggregate
standard. No other units of measurement are included in this
C150/C150MSpecification for Portland Cement
standard. When this test method refers to combined-unit
C305Practice for Mechanical Mixing of Hydraulic Cement
standards, the selection of the measurement systems is at the
Pastes and Mortars of Plastic Consistency
user’s discretion.
C490/C490MPractice for Use of Apparatus for the Deter-
1.3 Thetextofthistestmethodreferstonotesandfootnotes mination of Length Change of Hardened Cement Paste,
Mortar, and Concrete
that provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered C511Specification for Mixing Rooms, Moist Cabinets,
Moist Rooms, and Water Storage Tanks Used in the
as requirements of this test method.
Testing of Hydraulic Cements and Concretes
1.4 This standard does not purport to address all of the
C670Practice for Preparing Precision and Bias Statements
safety concerns, if any, associated with its use. It is the
for Test Methods for Construction Materials
responsibility of the user of this standard to establish appro-
C1260Test Method for Potential Alkali Reactivity of Ag-
priate safety, health, and environmental practices and deter-
gregates (Mortar-Bar Method)
mine the applicability of regulatory limitations prior to use. A
C1778Guide for Reducing the Risk of Deleterious Alkali-
specific precautionary statement is given in the section on
Aggregate Reaction in Concrete
Reagents.
D1193Specification for Reagent Water
1.5 This international standard was developed in accor-
E11Specification forWovenWireTest Sieve Cloth andTest
dance with internationally recognized principles on standard-
Sieves
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
3. Terminology
mendations issued by the World Trade Organization Technical
3.1 Definitions—For definitions of other terms relating to
Barriers to Trade (TBT) Committee.
concrete or aggregates, see Terminology C125.
2. Referenced Documents
3.1.1 relative density (OD), n—as defined in Test Methods
2
C127 or C128, for coarse and fine aggregates, respectively.
2.1 ASTM Standards:
C109/C109MTest Method for Compressive Strength of
4. Significance and Use
Hydraulic Cement Mortars (Using 2-in. or [50 mm] Cube
4.1 This test method provides a means of detecting the
Specimens)
potential of an aggregate intended for use in concrete for
undergoingalkali-silicareactionresultinginpotentiallydelete-
1
This test method is under the jurisdiction of ASTM Committee C09 on
rious internal expansion. It is based on the NBRI Accelerated
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee
3
Test Method (1-4). It is especially useful for aggregates that
C09.50 on Aggregate Reactions in Concrete.
Current edition approved Nov. 1, 2022. Published December 2022. Originally
react slowly or produce expansion late in the reaction.
approved in 1989. Last previous edition approved in 2021 as C1260–21. DOI:
However,itdoesnotevaluatecombinationsofaggregateswith
10.1520/C1260-22.
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
3
Standards volume information, refer to the standard’s Document Summary page on The boldface numbers in parentheses refer to a list of references at the end of
the ASTM website. the text.
*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 ----------------------
C1260 − 22
cementitious materials nor are the test conditions representa- volume of a morta
...
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: C1260 − 21 C1260 − 22
Standard Test Method for
Potential Alkali Reactivity of Aggregates (Mortar-Bar
1
Method)
This standard is issued under the fixed designation C1260; 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 test method permits detection, within 16 days, of the potential for deleterious alkali-silica reaction of aggregate in mortar
bars.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. When
this test method refers to combined-unit standards, the selection of the measurement systems is at the user’s discretion.
1.3 The text of this test method 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 this test method.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of
regulatory limitations prior to use. A specific precautionary statement is given in the section on Reagents.
1.5 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:
C109/C109M Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50 mm] Cube Specimens)
C125 Terminology Relating to Concrete and Concrete Aggregates
C127 Test Method for Relative Density (Specific Gravity) and Absorption of Coarse Aggregate
C128 Test Method for Relative Density (Specific Gravity) and Absorption of Fine Aggregate
C150/C150M Specification for Portland Cement
C151/C151M Test Method for Autoclave Expansion of Hydraulic Cement
C295/C295M Guide for Petrographic Examination of Aggregates for Concrete
C305 Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency
C490/C490M Practice for Use of Apparatus for the Determination of Length Change of Hardened Cement Paste, Mortar, and
Concrete
1
This test method is under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee C09.50 on
Aggregate Reactions in Concrete.
Current edition approved April 1, 2021Nov. 1, 2022. Published April 2021December 2022. Originally approved in 1989. Last previous edition approved in 20142021 as
C1260 – 14.C1260 – 21. DOI: 10.1520/C1260-21.10.1520/C1260-22.
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 ----------------------
C1260 − 22
C511 Specification for Mixing Rooms, Moist Cabinets, Moist Rooms, and Water Storage Tanks Used in the Testing of Hydraulic
Cements and Concretes
C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
C856C1260 Practice for Petrographic Examination of Hardened ConcreteTest Method for Potential Alkali Reactivity of
Aggregates (Mortar-Bar Method)
C1778 Guide for Reducing the Risk of Deleterious Alkali-Aggregate Reaction in Concrete
D1193 Specification for Reagent Water
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
3. Terminology
3.1 Definitions—For definitions of other terms relating to concrete or aggregates, see Terminology C125.
3.1.1 relative density (OD), n—as defined in Test Methods C127 or C128, for coarse and fine aggregates, respectively.
4. Significance and Use
4.1 This test method provides a means of detecting the potential of an aggregate intended for use in concrete for undergoing
3
alkali-silica reaction resulting in potentially del
...
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: C1260 − 22
Standard Test Method for
Potential Alkali Reactivity of Aggregates (Mortar-Bar
1
Method)
This standard is issued under the fixed designation C1260; 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* C125 Terminology Relating to Concrete and Concrete Ag-
gregates
1.1 This test method permits detection, within 16 days, of
C127 Test Method for Relative Density (Specific Gravity)
the potential for deleterious alkali-silica reaction of aggregate
and Absorption of Coarse Aggregate
in mortar bars.
C128 Test Method for Relative Density (Specific Gravity)
1.2 The values stated in SI units are to be regarded as
and Absorption of Fine Aggregate
standard. No other units of measurement are included in this
C150/C150M Specification for Portland Cement
standard. When this test method refers to combined-unit
C305 Practice for Mechanical Mixing of Hydraulic Cement
standards, the selection of the measurement systems is at the
Pastes and Mortars of Plastic Consistency
user’s discretion.
C490/C490M Practice for Use of Apparatus for the Deter-
mination of Length Change of Hardened Cement Paste,
1.3 The text of this test method refers to notes and footnotes
that provide explanatory material. These notes and footnotes Mortar, and Concrete
C511 Specification for Mixing Rooms, Moist Cabinets,
(excluding those in tables and figures) shall not be considered
as requirements of this test method. Moist Rooms, and Water Storage Tanks Used in the
Testing of Hydraulic Cements and Concretes
1.4 This standard does not purport to address all of the
C670 Practice for Preparing Precision and Bias Statements
safety concerns, if any, associated with its use. It is the
for Test Methods for Construction Materials
responsibility of the user of this standard to establish appro-
C1260 Test Method for Potential Alkali Reactivity of Ag-
priate safety, health, and environmental practices and deter-
gregates (Mortar-Bar Method)
mine the applicability of regulatory limitations prior to use. A
C1778 Guide for Reducing the Risk of Deleterious Alkali-
specific precautionary statement is given in the section on
Aggregate Reaction in Concrete
Reagents.
D1193 Specification for Reagent Water
1.5 This international standard was developed in accor-
E11 Specification for Woven Wire Test Sieve Cloth and Test
dance with internationally recognized principles on standard-
Sieves
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
3. Terminology
mendations issued by the World Trade Organization Technical
3.1 Definitions—For definitions of other terms relating to
Barriers to Trade (TBT) Committee.
concrete or aggregates, see Terminology C125.
2. Referenced Documents
3.1.1 relative density (OD), n—as defined in Test Methods
2
C127 or C128, for coarse and fine aggregates, respectively.
2.1 ASTM Standards:
C109/C109M Test Method for Compressive Strength of
4. Significance and Use
Hydraulic Cement Mortars (Using 2-in. or [50 mm] Cube
Specimens) 4.1 This test method provides a means of detecting the
potential of an aggregate intended for use in concrete for
undergoing alkali-silica reaction resulting in potentially delete-
1
This test method is under the jurisdiction of ASTM Committee C09 on
rious internal expansion. It is based on the NBRI Accelerated
Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee
3
Test Method (1-4). It is especially useful for aggregates that
C09.50 on Aggregate Reactions in Concrete.
Current edition approved Nov. 1, 2022. Published December 2022. Originally
react slowly or produce expansion late in the reaction.
approved in 1989. Last previous edition approved in 2021 as C1260 – 21. DOI:
However, it does not evaluate combinations of aggregates with
10.1520/C1260-22.
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
3
Standards volume information, refer to the standard’s Document Summary page on The boldface numbers in parentheses refer to a list of references at the end of
the ASTM website. the text.
*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 ----------------------
C1260 − 22
cementitious materials nor are the test conditions representa- volume of a mortar bar may be taken as 184 mL. Include
tive of those encountered by concrete in service. sufficie
...
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