ASTM C1260-05
(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)
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. The values in inch-pound units are shown in parentheses, and are for informational purposes only.
1.3This 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 and health practices and determine the applicability of regulatory limitations prior to use. A specific precautionary statement is given in the section on Reagents.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
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Designation:C1260–05
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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope* C856 Practice for Petrographic Examination of Hardened
Concrete
1.1 Thistestmethodpermitsdetectionwithin16daysofthe
D1193 Specification for Reagent Water
potential for deleterious alkali-silica reaction of aggregate in
E11 Specification for Wire-Cloth and Sieves for Testing
mortar bars.
Purposes
1.2 The values stated in SI units are to be regarded as
standard. The values in inch-pound units are shown in paren-
3. Significance and Use
theses, and are for informational purposes only.
3.1 This test method provides a means of detecting the
1.3 This standard does not purport to address all of the
potential of an aggregate intended for use in concrete for
safety concerns, if any, associated with its use. It is the
undergoingalkali-silicareactionresultinginpotentiallydelete-
responsibility of the user of this standard to establish appro-
rious internal expansion. It is based on the NBRI Accelerated
priate safety and health practices and determine the applica-
3
Test Method (1-4). It is especially useful for aggregates that
bility of regulatory limitations prior to use. Aspecific precau-
react slowly or produce expansion late in the reaction. How-
tionary statement is given in the section on Reagents.
ever, it does not evaluate combinations of aggregates with
2. Referenced Documents cementitious materials nor are the test conditions representa-
2
tive of those encountered by concrete in service.
2.1 ASTM Standards:
3.2 BecausethespecimensareexposedtoaNaOHsolution,
C109/C109M Test Method for Compressive Strength of
the alkali content of the cement is not a significant factor in
Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube
affecting expansions.
Specimens)
3.3 When excessive expansions (see Appendix X1) are
C150 Specification for Portland Cement
observed, it is recommended that supplementary information
C151 Test Method for Autoclave Expansion of Portland
be developed to confirm that the expansion is actually due to
Cement
alkali-silica reaction. Sources of such supplementary informa-
C295 Guide for Petrographic Examination of Aggregates
tion include: (1) petrographic examination of the aggregate
for Concrete
(Guide C295) to determine if known reactive constituents are
C305 PracticeforMechanicalMixingofHydraulicCement
present; (2) examination of the specimens after tests (Practice
Pastes and Mortars of Plastic Consistency
C856)toidentifytheproductsofalkalireaction;and(3)where
C490 Practice for Use of Apparatus for the Determination
available,fieldservicerecordscanbeusedintheassessmentof
of Length Change of Hardened Cement Paste, Mortar, and
performance.
Concrete
3.4 When it has been concluded from the results of tests
C511 Specification for Mixing Rooms, Moist Cabinets,
performed using this test method and supplementary informa-
Moist Rooms, and Water Storage Tanks Used in the
tion that a given aggregate should be considered potentially
Testing of Hydraulic Cements and Concretes
deleteriously reactive, the use of mitigative measures such as
C670 Practice for Preparing Precision and Bias Statements
low-alkali portland cement, mineral admixtures, or ground
for Test Methods for Construction Materials
granulated blast-furnace slag should be evaluated (see last
sentence of 3.1).
1
This test method is under the jurisdiction of ASTM Committee C09 on
4. Apparatus
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee
C09.26 on Chemical Reactions. 4.1 The apparatus shall conform to Specification C490,
Current edition approved May 1, 2005. Published May 2005. Originally
except as follows:
approved in 1989. Last previous edition approved in 2001 as C1260–01.
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.
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
International (www.astm.org) for the lat
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