Development of Rational Overlay Design Procedures for Flexible Pavements

This report presents the findings of a research study conducted to develop procedures for the design of structural Hot Mix Asphalt (HMA) overlays over existing flexible pavements in Wisconsin. The recommended procedures are presented in a hierarchal approach to allow the user the flexibility of estimating the effective structural number of an in-place HMA pavement based on visual and/or nondestructive deflection testing data and to develop overlay thickness requirements based on the structural deficiency approach. Techniques for estimating the effective structural number of an existing pavement based on surface deflection are presented. The equations presented in the 1993 American Association of State Highway and Transportation Officials (AASHTO) Design Guide were modified to enhance their applicability. Alternate deflection-based techniques were also developed to allow for the estimation of effective structural number without pavement thickness information. The overlay design procedures were developed to maintain consistency with the current Wisconsin Department of Transportation (WisDOT) practice of new flexible pavement design based on the 1972 AASHTO design equation.

• Record URL:
  • http://wisdotresearch.wi.gov/wp-content/uploads/00-05flexibleoverlay-f1.pdf
• Record URL:
  • http://minds.wisconsin.edu/bitstream/handle/1793/53879/WHRP_05-12_Rational_Overlay_Design.pdf
• 
• Corporate Authors:

  Marquette University

  Department of Civil and Environmental Engineering, P.O. Box 1881
  Milwaukee, WI  United States  53201-1881

  Wisconsin Department of Transportation

  4802 Sheboygan Avenue, P.O. Box 7910
  Madison, WI  United States  53707-7910

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Crovetti, James A
• Publication Date: 2005-9

Language

• English

Media Info

• Media Type: Print
• Edition: Final Report
• Features: Figures; References; Tables;
• Pagination: 59p

Subject/Index Terms

• TRT Terms: Bituminous overlays; Deflection; Design methods; Equations; Flexible pavements; Hot mix asphalt; Nondestructive tests; Pavement structural numbers; Thickness
• Identifier Terms: AASHTO Design Guide
• Geographic Terms: Wisconsin
• Subject Areas: Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces;

Filing Info

• Accession Number: 01013375
• Record Type: Publication
• Report/Paper Numbers: WHRP 05-12
• Contract Numbers: WHRP Project 0092-00-05
• Files: TRIS, USDOT, STATEDOT
• Created Date: Dec 22 2005 10:11AM