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Development of a Rolling Dynamic Deflectometer for Continuous Deflection Testing of Pavements; Rept. for Sep 96-Aug 97
| 题名： | Development of a Rolling Dynamic Deflectometer for Continuous Deflection Testing of Pavements; Rept. for Sep 96-Aug 97 |
| 作者： | Bay, J. A.; Stokoe, K. H. |
| 关键词： | Pavement deflections; Deflectometers; Stiffness; Test methods; Texas; Runways; Nondestructive tests; Mobil equipment; Pavement tests; Vibration; Vibrators(Machinery) |
| 摘要： | A rolling dynamic deflectometer (RDD) was developed as a nondestructive method for determining continuous defection profiles of pavements. Unlike other commonly used pavement testing methods, the RDD performs continuous rather than discrete measurements. The ability to perform continuous measurements makes RDD testing very effective for quickly characterizing large sections of pavement while simultaneously providing a comprehensive picture of the pavement condition, with little danger of missing critical pavement features. ROD testing is performed while the RDD vehicle travels at speeds of up to 1.5 mph (2.4 km/hr). Continuous deflection profiles determined with the RDD can be used to: (1) assess the overall stiffness of a pavement; (2) differentiate the relative stiffness of different regions; (3) detect cracks, joints, and weak regions; (4) assess the performance of cracked or jointed regions; (5) delineate the regions of the pavement influenced by joints and cracks; and (6) identify areas where additional discrete testing should be performed. The RDD is a powerful tool having the potential for: (1) designing pavement repairs and retrofits, (2) estimating the remaining life of pavements, and (3) functioning as a quality assurance and quality control system during the construction of new pavements. |
| 总页数： | 260p |
| 报告类型： | 科技报告 |
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