Field Study of Air Content Stability in the Slipform Paving Process
| Autor: | Thomas J. Van Dam, Lawrence L. Sutter, Gerald C. Anzalone, Kurt D Smith, Prashant Ram |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Transportation Research Record: Journal of the Transportation Research Board. 2408:55-65 |
| ISSN: | 2169-4052 0361-1981 |
| DOI: | 10.3141/2408-07 |
| Popis: | This study evaluated the impacts of construction on the air content and air void system structure of portland cement concrete pavements. The primary intent was to quantify the air content of fresh concrete before and after it had gone through the slipform paver. The air void system parameters of hardened concrete were then assessed with cast cylinders and extracted core specimens. The results of the air content testing on fresh concrete and the concrete cylinder specimens cast in the field suggested that some loss of air (approximately 1%) occurred as the concrete passed through the paver. Laboratory testing performed on cores extracted from the pavement did not provide conclusive evidence that entrained air was lost during the slipform paving process. In fact, many extracted cores had measured air content values that were much higher than those measured in the fresh concrete and even higher than the specification requirement. If excessive, such values could result in increased permeability and low-streng... |
| Databáze: | OpenAIRE |
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