| Autor: |
Heather T. See, Emmanuel K. Attiogbe, Matthew A. Miltenberger |
| Rok vydání: |
2003 |
| Předmět: |
|
| Zdroj: |
ACI Materials Journal. 100 |
| ISSN: |
0889-325X |
| DOI: |
10.14359/12625 |
| Popis: |
This paper outlines a testing and analysis procedure to quantify behavior of concrete under restrained shrinkage ring specimens. Cracking resistance is found to depend not only on shrinkage potential and tensile strength, but also on shrinkage rate and tensile creep characteristics of the concrete. The creep strain obtained for the ring specimens can be as high as 50% of the free shrinkage strain, indicating that tensile creep is significant and must be considered in evaluating the risk of cracking under restrained conditions. Shrinkage reducing admixtures greatly enhance the cracking resistance of concrete by reducing both the shrinkage potential and the shrinkage rate. A separate study was conducted on the concrete mixtures to determine the tensile creep characteristics under a constant stress. Results from the 2 studies are compared, and findings are discussed. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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