1. Scope

Keywords

Rationale

The current industry method for producing shrinkage-compensating concrete in most projects is through introduction of a cementitious additive at the time of batching. These materials have historically been categorized as an ASTM C494 Type S admixture or other generic classification. The industry has asked for a more applicable standard which these materials can be qualified for use and more appropriately tested for conformance for the properties they impart to the mixture. Previous actions by the subcommittee to incorporate these materials into existing standards were not accepted. It was determined through discussion among subcommittee members and in response to comments from voters that a new, separate specification should be drafted to properly address the qualification of these materials.