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原文传递 LTPP (Long Term Pavement Performance) Data Analysis: Effectiveness of Maintenance and Rehabilitation Options.

题名：	LTPP (Long Term Pavement Performance) Data Analysis: Effectiveness of Maintenance and Rehabilitation Options.
作者：	hall, k. t. correa, c. e. simpson, a. l.
关键词：	data analysis, rehabilitation, flexible pavements, asphalt pavements, pavement overlays, surface roughness, fatigue(materials), cracking
摘要：	NCHRP Project 20-50(03/04) was conducted to assess the relative performance of different pavement maintenance and rehabilitation treatments, including the influence of pretreatment condition and other factors on treatment effectiveness. The data used in this study were drawn from the Long-Term Pavement Performance Studies SPS-3 (flexible pavement maintenance), SPS-5 and GPS-6B (flexible pavement rehabilitation), and SPS-6 and GPS-7B (rigid pavement rehabilitation) experiments. In terms of roughness, rutting, and fatigue cracking, the most effective of the maintenance treatments in the SPS-3 core experiment has been the thin overlay treatment, followed by the chip seal treatment, and then the slurry seal treatment. The thin overlay treatment was the only one of the four SPS-3 maintenance treatments to produce an initial (albeit small) reduction in roughness, and the only one of the four to have a significant effect on long-term roughness, relative to the control sections. For rougher pavements, however, there was some evidence that chip seals and slurry seals also had some effect on long-term roughness, rutting, and cracking, relative to the control sections. Crack seals did not have any significant on long-term roughness, rutting, or fatigue cracking. Overall, overlay thickness and preoverlay roughness level were the two factors that most influenced the performance of asphalt overlays of asphalt pavements in the SPS-5 experiment, with respect to roughness, rutting, and fatigue cracking. The 5-inch overlays have outperformed 2-inch overlays with respect to roughness, rutting, and fatigue cracking. / NOTE: Final rept. / Supplementary Notes: See also PB2007-106717, PB2007-106721, and PB2007-106730. Sponsored by American Association of State Highway and Transportation Officials, Washington, DC. and Federal Highway Administration, Washington, DC. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA.
总页数：	u0712；332p
报告类型：	科技报告