TEMPERATURE ADJUSTMENT OF DYNAMIC DEFLECTION MEASUREMENTS ON ASPHALT CONCRETE PAVEMENTS. FINAL REPORT

The application of elastic theory to the design of overlays on existing pavement requires that a modulus of elasticity be assigned to the existing structural system. Estimates of elastic modulus are obtained from dynamic deflection readings in the field; but asphalt is a highly temperature-sensitive visco-elastic material and deflections not corrected to a standard temperature can produce misleading results. It is therefore the objective of the present study to develop a procedure for which some temperature gradient exists because of the combined influences of solar radiation, wind, air temperature, cloud cover and other variables specific to time and location which cause temperature variations within the pavement layer. Two models are presented for the achievement of that objective. The first of the two models has been designed to utilize site-specific conditions for calculating a temperature profile at a given time within an asphaltic layer. The second model relates an equivalent elastic modulus to the calculated temperature profile.

• Corporate Authors:

  University of Toledo

  Department of Civil Engineering, 2801 West Bancroft Street
  Toledo, OH  United States  43606-3390

  Ohio Department of Transportation

  25 South Front Street
  Columbus, OH  United States  43215

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Wolfe, R K
  • Randolph, B W
• Publication Date: 1992-8-1

Language

• English

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: 109 p.

Subject/Index Terms

• TRT Terms: Asphalt concrete; Deflection; Modulus of elasticity; Pavements; Temperature
• Old TRIS Terms: Dynamic deflection determination; Pavement deflection
• Subject Areas: Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces;

Filing Info

• Accession Number: 00628941
• Record Type: Publication
• Report/Paper Numbers: FHWA/OH-93/010
• Contract Numbers: State Job No. 14467(0)
• Files: TRIS, USDOT, STATEDOT
• Created Date: Apr 29 1996 12:00AM