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SELECTION OF MILLING DEPTH FOR ASPHALT PAVEMENT REHABILITATION.
| 题名： | SELECTION OF MILLING DEPTH FOR ASPHALT PAVEMENT REHABILITATION. |
| 作者： | Wu-Z; Hossain-M; Gisi-AJ |
| 关键词： | Asphalt-concrete-pavements; Depth-; Falling-weight-deflectometers; Fatigue-tests; Kansas-; Milling-; Overlays-Pavements; Rehabilitation-Maintenance; Thickness- |
| 摘要： | Milling of an asphalt concrete (AC) pavement surface refers to the mechanical removal of a part of the pavement surface. The Kansas Department of Transportation (KDOT) and the Kansas Turnpike Authority (KTA) routinely mill some AC pavements before inlaying. KTA selects the milling depth based on engineering judgement. On some major projects where deep milling is involved, KDOT currently selects a mill-and-inlay depth so that the ratio of this depth to the remaining milled pavement thickness would be higher than 1.0. This somewhat insures that much of the full pavement thickness would consist of newer materials. These practices of KDOT and KTA were analyzed in a recent study and the findings are reported in this paper. Nine mill-and-inlaid pavement sections, selected on six different routes in Kansas, were studied. Falling Weight Deflectometer (FWD) tests were done on those sections at 15 or 30-m intervals before milling, after milling, and after inlaying. Laboratory fatigue tests were also done on the AC beams sawn from four test sections. The results show that in order to achieve higher fatigue life, the mill-and-inlay thickness should be at least 1.25 times the thickness of the remaining milled pavement layer. Based on the mechanistic-empirical analysis procedure, it was found that the mill-and-inlaid pavement fatigue life also does not linearly increase with the inlay thickness. |
| 总页数： | Conference Title: Mid-Continent Transportation Symposium 2000. Location: Ames, Iowa. Sponsored by: Iowa State University |
| 报告类型： | 科技报告 |
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