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Field Verification Instrument to Assess the Placement Accuracy of Dowel Bars and Tie Bars in PCCP. Final rept. Aug 02-Nov 03.
| 题名： | Field Verification Instrument to Assess the Placement Accuracy of Dowel Bars and Tie Bars in PCCP. Final rept. Aug 02-Nov 03. |
| 作者： | DEVAULT, J. E.; MILLER, R. D. |
| 关键词： | *Sensors-; *Highway-construction; *Dowel-bars; *Tie-bars; *Placement-.;Location-; Accuracy-; Concrete-pavements; Design-; Detection-; Pavement-joints; Instruments-. |
| 摘要： | This report describes the design and construction of a prototype instrument for location of steel dowel bars and tie bars in highway concrete. The instrument consists of a non-metallic (wooden) wheeled platform which carries a commercially available metal detector known as a covermeter, specially modified for this project. The covermeter is designed to be held in the hand and swept over a concrete wall or road, displaying the distance to steel within the concrete. The modified covermeter, mounted on the platform together with a notebook computer, outputs a serial data stream which is converted by the included software into information about the location and orientation of an array of dowel bars. Operation of the instrument consists of pushing it slowly across the road surface along a saw cut. The output display consists of three-dimensional color depictions of the dowel array, showing the calculated positions and displacements. |
| 报告类型： | 科技报告 |
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