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).
Astm Asr Testing
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. 4.3 When excessive expansions (see Appendix X1) are observed, it is recommended that supplementary information be developed to confirm that the expansion is actually due to alkali-silica reaction. Sources of such supplementary information include: ( 1) petrographic examination of the aggregate (Guide C295/C295M) to determine if known reactive constituents are present; ( 2) examination of the specimens after tests (Practice C856) to identify the products of alkali reaction; and ( 3) where available, field service records can be used in the assessment of performance.
Astm C1260 Test Method
1.3 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. A specific precautionary statement is given in the section on Reagents.2. Referenced Documents (purchase separately)ASTM StandardsTest Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in.
Astm C1260
For this study, specimens were prepared according to ASTM C1260 (Standard Test Method for Potential Alkali Reactivity of Aggregates (Mortar-Bar Method)) and ASTM C1567 (Standard Test Method for Determining the Potential Alkali-Silica Reactivity of Combinations of Cementitious Materials and Aggregate (Accelerated Mortar-Bar Method)). Potential Alkali Reactivity of Aggregates (Mortar-Bar Method).