A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The Influence of Retarding Admixtures on the Drying Shrinkage of Concrete
Concretes were made containing six bags of cement per cubic yard, five retarding admixtures plus control, and at slumps of two or six inches. The admixtures were a lignosulfonate, a hydroxyacid, and a carbohydrate proprietary materials and glycolic acid and sucrose. The hardened concretes were dried at 73F and 50 percent relative humidity. Shrinkage was determined at times from 7 days to 6 months. There were no systematic differences in the maximum shrinkage values except that those for concrete containing the hydroxyacid retarder were slightly lower than the others. The shrinkage-log time date seem, in most cases, to be reasonably well represented by two straight lines breaking at the 28-day value.
The Influence of Retarding Admixtures on the Drying Shrinkage of Concrete
Concretes were made containing six bags of cement per cubic yard, five retarding admixtures plus control, and at slumps of two or six inches. The admixtures were a lignosulfonate, a hydroxyacid, and a carbohydrate proprietary materials and glycolic acid and sucrose. The hardened concretes were dried at 73F and 50 percent relative humidity. Shrinkage was determined at times from 7 days to 6 months. There were no systematic differences in the maximum shrinkage values except that those for concrete containing the hydroxyacid retarder were slightly lower than the others. The shrinkage-log time date seem, in most cases, to be reasonably well represented by two straight lines breaking at the 28-day value.
The Influence of Retarding Admixtures on the Drying Shrinkage of Concrete
W. L. Dolch (author) / C. F. Scholer (author)
1974
19 pages
Report
No indication
English
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