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Feasibility Study of Non-Contact, High-Speed Elastic Property Measurement of Pavements. Technical rept. (Sept. 2004-Aug. 2005).
| 题名： | Feasibility Study of Non-Contact, High-Speed Elastic Property Measurement of Pavements. Technical rept. (Sept. 2004-Aug. 2005). |
| 作者： | CHEN, X.; EKBOTE, A.; LI, J.; LIU, R.; XING, H. |
| 关键词： | *Elasticity-; *Ground-penetrating-radar; *Asphalt-pavements.;Feasibility-studies; Elastic-properties; Measurements-; Non-contact-; High-speeds; Correlations-; Electrical-properties; Deflections-; Geosensors-; Lasers-; Diaelectric-constants; Density-. |
| 摘要： | Elastic properties of asphalt pavements are extensively used for pavement evaluation and maintenance scheduling. Presently, methods such as Falling Weight Deflectometer (FWD), Plate Load Tests and Rolling Dynamic Deflectometer (RDD) are used by the Department of Transportation for these measurements. These methods have a very slow rate of data production because they are contact measurement systems. In this project, a laser system and a Ground Penetrating Radar (GPR) system were developed for measurement of the elastic properties of asphalt pavement. Several experiments and field tests were conducted at highway speeds using the GPR to find the correlation between the electrical properties and elastic properties of asphalt pavements. Lab tests performed using the Frequency Modulated Continuous Wave (FMCW) GPR and the Pulse GPR indicated a close correlation between the dielectric constant of asphalt and its density. The Pulse GPR was then used to estimate pavement deflection for a 0.3 mile pavement section and the results were compared with the FWD results. The pavement deflections estimated using the GPR and those measured using the FWD were found to be within an acceptable range of error. |
| 报告类型： | 科技报告 |
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