1. Rationale
The current Annex regarding using uranyl acetate to identify alkali-silica reactivity (ASR) in hardened concrete is mandatory information. Since uranyl acetate is toxic and harmful to the environment, the test should be limited. In addition, the test is not a petrographic method and is seldom used in the laboratory. Therefore, the uranyl acetate method should be a non-mandatory method. This ballot items changes the Annex ()Mandatory to Appendix (Non-Mandatory), and make necessary changes in the 7 places that mentioned Annex in the main body of the method. The involved texts are either changed accordingly, or deleted whenever it is deemed redundant.
Keywords
aggregates; air voids; alkali-silica reaction; analysis; deterioration; examination; fire effects; hardened concrete; microscopy; paste; petrographic; secondary deposits; ICS Number Code 91.100.30 (Concrete and concrete products)
Citing ASTM Standards
[Back to Top]
