A new ASTM standard — C 1646/C 1646M, Practice for Making and Curing Test Specimens for Evaluating Frost Resistance of Coarse Aggregate in Air- Entrained Concrete by Rapid Freezing and Thawing — spells out requirements for specimen preparation for C 666 testing. The standard falls under the jurisdiction of Subcommittee C09.67 on Resistance to the Environment, part of ASTM International Committee C09 on Concrete and Concrete Aggregates.
The ASTM committee first approved the C 666/C 666M Test Method for Resistance of Concrete to Rapid Freezing and Thawing in 1971. However, results of testing done in accordance with C 666 could often vary from laboratory to laboratory because there were no standardized requirements for specimen preparation. C 1646 will promote consistency in specimen preparation. All interested parties are invited to participate in standards development.
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