CT Analysis of Ancient Concretes
| 项目名称： | CT Analysis of Ancient Concretes |
| 摘要： | This project will continue collaborative research between geologists and engineers at Iowa State University and Iowa Department of Transportation (DOT) into the evolution of pore networks in extremely long-lived Iowa concrete pavements. The results of a preliminary study of three concretes showed that the deterioration of coarse aggregates created an air void system in pavements before air entrainment was practiced. For this study, first the project team will make thin sections of the concretes to examine deteriorating coarse aggregate particles and determine their lithology and mode of deterioration. Second, the team will computerized tomography (CT) scan the remaining samples of concrete obtained in an earlier study (Hanson, 2007) that represent a spectrum of ages and methods for pavement manufacture from Iowa. These sample will also be thin sectioned and the state of their coarse aggregate particles will be evaluated. Third, the team will provide the DOT with a computer code that provides similar metrics to the RapidAir 457 Air Void Analyzer but for CT images (e.g., spacing factor, specific surface, number of voids, void size distribution). |
| 状态： | Completed |
| 资金： | 121984 |
| 资助组织： | Iowa Department of Transportation |
| 项目负责人： | Clute, Khyle |
| 主要研究人员： | Hasiuk, Franek |
| 开始时间： | 20170701 |
| 预计完成日期： | 20190228 |
| 实际结束时间： | 0 |
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