(1990) Drying Shrinkage in P.C. Concrete, MLR-89-5, 1990. Transportation, Department of
|
PDF
IADOT_mlr8905_Drying_Shrinkage_PCC_1990.pdf File Size:245kB |
Abstract
Crack formation has been a problem on some recently constructed bridges in Iowa. Drying shrinkage has been considered a contributing factor in that cracking. The study was undertaken to evaluate some of those material properties that contribute to the magnitude of drying shrinkage. Cement content, cement composition, fly ash and retarding admixture were the factors studied. Concrete prisms were cast for seven mixes and, after curing, were exposed to 100 deg F heat at ambient humidity for 280 days. The following were observed from the testing: (1) Higher C3A content cement concrete produced larger shrinkage; (2) Use of fly ash increased shrinkage; (3) Use of retarder increased shrinkage; and (4) Lowering the cement content reduced the shrinkage.
| Item Type: | Departmental Report |
|---|---|
| Keywords: | Admixtures, Cement content, Concrete, Cracking, Fly ash, Humidity, Portland cement concrete, Retarders (Concrete), Shrinkage, Temperature |
| Subjects: | Transportation Transportation > Materials Transportation > Roads and highways Transportation > Research Transportation > Research > Concrete |
| ID Code: | 17171 |
| Deposited By: | Iowa DOT Library |
| Deposited On: | 10 Jun 2014 15:36 |
| Last Modified: | 26 Jan 2015 12:38 |
| URI: | https://publications.iowa.gov/id/eprint/17171 |