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EVALUATION OF REBAR CORROSION IN CONCRETE BY ACTIVE THERMAL SENSING.
| 题名： | EVALUATION OF REBAR CORROSION IN CONCRETE BY ACTIVE THERMAL SENSING. |
| 作者： | Poulain-DE; Alexander-DR; Krause-JK |
| 关键词： | Bridges-; Corrosion-; Infrared-imagery; Inspection-; Nondestructive-tests; Reinforcing-bars |
| 摘要： | Active thermal (infrared) sensing has been used to locate simulated areas of corrosion in uncoated rebar test specimens embedded in concrete slabs. Varying amounts of rebar corrosion were simulated experimentally by milling notches into steel bars and then filling the notches with an iron oxide paste. The rebars were embedded in concrete and then resistively heated using DC current. Images of the heated rebars (in concrete) were acquired using an infrared focal plane array camera. Infrared images, illustrating the ability to detect non-destructively a reduction in rebar cross-sectional area on only 10%, are presented. In addition, results are presented demonstrating the dependence of the resulting thermal images on the orientation of the defect. |
| 总页数： | Conference Title: Eighth International Bridge Management Conference. Location: Denver, Colorado. Sponsored by: Transportation Research Board Committee on Bridge Maintenance and Management (A3C06). Held: 19990426-19990428. Transportation Research Circular |
| 报告类型： | 科技报告 |
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