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ASTM C227

Standard Test Method for Potential Alkali Reactivity of Cement-Aggregate Combinations (Mortar-Bar Method)

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Organization: ASTM
Publication Date: 10 November 1997
Status: inactive
Page Count: 5
ICS Code (Cement. Gypsum. Lime. Mortar): 91.100.10
scope:

1. Scope

1.1 This test method covers the determination of the susceptibility of cement-aggregate combinations to expansive reactions involving hydroxyl ions associated with the alkalies (sodium and potassium) by measurement of the increase (or decrease) in length of mortar bars containing the combination during storage under prescribed conditions of test.

1.2 Alkalies participating in the expansive reactions usually are derived from the cement; under some circumstances they may be derived from other constituents of the concrete or from external sources. Two types of alkali reactivity of aggregates are recognized: (1) an alkali-silica reaction involving certain siliceous rocks, minerals, and natural or artificial glasses and (2) an alkali-carbonate reaction involving dolomite in certain calcitic dolomites and dolomitic limestones (see Standard C 294). The method is not recommended as a means to detect the latter reaction because expansions produced in the mortarbar test by the alkali-carbonate reaction (see Test Method C 586) are generally much less than those produced by the alkali-silica reaction for combinations having equally harmful effects in service.

1.3 The values stated in SI units are to be regarded as standard. The non-SI values, shown in parentheses, are for informational purposes only.

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 and health practices and determine the applicability of regulatory limitations prior to use.

Document History

February 1, 2010
Standard Test Method for Potential Alkali Reactivity of Cement-Aggregate Combinations (Mortar-Bar Method)
This test method covers the determination of the susceptibility of cement-aggregate combinations to expansive reactions involving hydroxyl ions associated with the alkalies (sodium and potassium) by...
June 10, 2003
Standard Test Method for Potential Alkali Reactivity of Cement-Aggregate Combinations (Mortar-Bar Method)
This test method covers the determination of the susceptibility of cement-aggregate combinations to expansive reactions involving hydroxyl ions associated with the alkalies (sodium and potassium) by...
ASTM C227
November 10, 1997
Standard Test Method for Potential Alkali Reactivity of Cement-Aggregate Combinations (Mortar-Bar Method)
1. Scope 1.1 This test method covers the determination of the susceptibility of cement-aggregate combinations to expansive reactions involving hydroxyl ions associated with the alkalies (sodium and...
August 10, 1997
Standard Test Method for Potential Alkali Reactivity of Cement-Aggregate Combinations (Mortar-Bar Method)
A description is not available for this item.
January 1, 1990
Standard Test Method for Potential Alkali Reactivity of Cement-Aggregate Combinations (Mortar-Bar Method)
A description is not available for this item.
February 20, 1987
STANDARD TEST METHOD FOR POTENTIAL ALKALI REACTIVITY OF CEMENT- AGGREGATE COMBINATIONS (MORTAR-BAR METHOD)
A description is not available for this item.
April 24, 1981
STANDARD TEST METHOD FOR POTENTIAL ALKALI REACTIVITY OF CEMENT- AGGREGATE COMBINATIONS (MORTAR-BAR METHOD)
A description is not available for this item.
January 1, 1950
Tentative Method of Test for POTENTIAL ALKALI REACTIVITY OF CEMENT - AGGREGATE COMBINATIONS
This method of test is intended to determine the potential expansive alkali reactivity of cement - aggregate combinations by measuring the expansion developed by the combinations in mortar bars...

References

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