Abstract
Precooling method is thought to be an effective way to control thermal cracks due to the heat of hydration for mass concrete structures. The authors executed a fundamental research on new type of precooling method by use of Dry Ice as a cooling medium. This paper describes cooling efficiency, carbonation, and workability of cool-down concrete when using Dry Ice. From this fundamental study, it is clarified that Dry Ice should be utilized for manufacturing chemically inert aggregates to avoid acceleration of carbonation of cool-down concrete and to assure its workability, and that its cooling procedure and process are proposed in the stage of actual application.
