INVESTIGATION OF MATHEMATICAL MODELS FOR ASPHALT PAVEMENT RUTTING. FINAL REPORT

Field studies in New Mexico indicate that trucks are presently operating with tire inflation pressures that average approximately 105 psi with approximately 25 percent operating at 115 psi. Modifications to the VESYS-3A computer program were made by FHWA for NMERI, to accept higher wheel load and tire pressures. The program was then used to predict rut depths produced by aircraft loads with wheel loads of approximately 30 kips and inflation pressures of up to approximately 355 psi. While computer code modifications were successful, it does not appear that the codes can be used directly for rut predictions for aircraft, since these modifications are not widely available. Furthermore, additional issues important with regard to aircraft wheel configurations and loads were not investigated. This portion of the study does suggest, however, that back calculations based on rut measurements may produce information necessary to estimate materials characteristics necessary for routine use of the program. Modified Shell creep models were considered as an alternate to determine materials characteristics necessary to predict rut damage due to new higher pressure truck tires. Shear models are suggested as possible methods to provide insight to rutting due to higher tire pressures and to design mixtures capable of supporting these loads.

• Corporate Authors:

  New Mexico Engineering Research Center

  2650 Yale SE
  Albuquerque, NM  United States  87131

  New Mexico State Highway and Transportation Department

  P.O. Box 1149
  Sante Fe, NM  United States  87504-1149

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • PAVLOVICH, R D
  • SHULER, T S
  • McKeen, R G
  • Eliassi, M
• Publication Date: 1989-8

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: 39 p.

Subject/Index Terms

• TRT Terms: Aircraft; Asphalt pavements; Backcalculation; Computer programs; Field studies; Forecasting; Inflation; Mathematical models; Ruts (Pavements); Rutting; Tire pressure; Tires; Trucks; Wheel loads
• Uncontrolled Terms: Field data; Rut; Rut depth
• Subject Areas: Aviation; Data and Information Technology; Highways; Motor Carriers; Pavements; Vehicles and Equipment; I23: Properties of Road Surfaces;

Filing Info

• Accession Number: 00488303
• Record Type: Publication
• Report/Paper Numbers: FHWA-HPR-NM-84-92, NMERI OC 89/101
• Contract Numbers: C00842
• Files: TRIS, USDOT, STATEDOT
• Created Date: Sep 30 1989 12:00AM