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Feasibility Study of Non-Contact, High-Speed Elastic Property Measurement of Pavements: Theoretical and Experimental Results. Technical rept. (Sept. 2004-Aug. 2005).
| 题名： | Feasibility Study of Non-Contact, High-Speed Elastic Property Measurement of Pavements: Theoretical and Experimental Results. Technical rept. (Sept. 2004-Aug. 2005). |
| 作者： | CHEN, X.; EKBOTE, A.; LI, J.; LIU, R. |
| 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： | Currently, the elastic properties of pavements are measured using FWD and RDDs. These devices use geosensors that need contact with pavement surface when measurements are made. In this project, a laser system has been developed to replace the geosensors in pavement deflection measurement. A Ground Penetrating Radar (GPR) system was also developed for the measurement of elastic properties of asphalt pavement. Several experiments and field tests have been conducted using the developed laser system and the GPR system. 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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