INVESTIGATION OF REFRIGERATED SLURRY.
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
Pagination or Media Count:
Feasibility of using a premixed refrigerated slurry in concreting operations was investigated. Calculations were made, and are summarized herein, to determine the amount of refrigeration necessary for the cooling of slurry and concrete. For the latter, variables were two slurry temperatures 35, 42 F, three percentages of free moisture in the fine aggregate 0, 4, 8, and three aggregate temperatures 60, 75, 90 F. Calculations were made both for precooled slurry alone and for precooled fine aggregate and slurry. It was found that refrigeration in addition to the cooling of the slurry is necessary. It is deemed that unless a decided advantage can be obtained by handling cement in the form of slurry, as compared with dry cement, refrigeration of premixed slurry would only tend to complicate the customary refrigeration procedure. Tests showed that refrigeration reduced bleeding and greatly extended setting time of the slurry, and that use of refrigerated slurry did not affect strength of concrete specimens cured at room temperatures. Author
- Civil Engineering