DETERMINATION OF REMAINING FLEXIBLE PAVEMENT LIFE. VOLUME II. FLEXIBLE PAVEMENT REMAINING LIFE CHARACTERISTICS INTERPRETED FROM THEORY AND LABORATORY FATIGUE TEST
Three Maryland state highways were analyzed. Eighteen inch diameter cores were obtained from which fatigue beams were tested. In conjunction with the lab study, a theoretical highway remaining damage model was developed to assist in correlations between predicted and observed remaining life. The model considers the lateral wander effect of the vehicle as well as the variable tensile strain pattern in a radial direction due to a 9 kip dual wheel load. The objective of the study was to assess the general feasibility of using field specimens of asphaltic concrete, tested in the lab for fatigue resistance, to measure the remaining life of a pavement. The study hypothesis was that differences in fatigue life would occur for beams sampled and tested from various traffic lanes (2, 4 or 6 feet) on a pavement. It was found that the use of fatigue tests from in-situ field specimens to determine remaining damage analysis has potential but questionable merit. Results are felt to be applicable only to the base course layer (bituminous layer) and not applicable for surface analysis. Results indicate that remaining damage is affected by lateral location and orientation of the fatigue beam. Beams in the wheel path tend to have a lower remaining life. Remaining damage of transverse beams was higher than longitudinal beams at the same lateral location. This difference becomes negligible towards the center of the traffic lane.
- See also Volume 1, PB-296562 and Volume 3, PB-296564. Prepared for Maryland State Highway Administration, Brooklandville. Also available in set of 4 reports, PB-296561-SET.
University of Maryland, College ParkDepartment of Civil and Environmental Engineering
College Park, MD USA 20742
Brooklandville, MD USA 21022
Washington, DC USA 20590
- Witczak, M W
- Dalton, E H
- Publication Date: 1978-10
- Pagination: 270 p.
- TRT Terms: Accuracy; Asphalt concrete; Bituminous pavements; Deterioration; Failure; Fatigue (Mechanics); Fatigue tests; Flexible pavements; Flexural strength; Forecasting; Fracture mechanics; Laboratory tests; Loads; Maintenance; Mathematical models; Pavements; Performance tests; Service life; Stiffness tests; Tests; Theory
- Geographic Terms: Maryland
- Old TRIS Terms: Pavement life
- Subject Areas: Design; Highways; Maintenance and Preservation; Pavements;
- Accession Number: 00197622
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: FHWA/MD/R-79/2 Final Rpt.
- Files: NTIS, TRIS, USDOT, STATEDOT
- Created Date: Aug 28 1979 12:00AM