DESIGN OF ACHM OVERLAYS BY DEFLECTION ANALYSIS

Asphaltic concrete hot mix (ACHM) overlays used for improving load carrying quality of a roadway have not as yet been designed according to specific criteria. Of the design procedures available, only deflections take into account the structural strength of an in-situ pavement. The report covers eight test sections that were tested in Arkansas during each season for a period of four years. Data were collected, reduced, and plotted on a series of graphs of temperature (pavement & ambient) vs. deflection (total & rebound). Regression analyses were performed on each set of data to fit a trend line and determine the relationship between temperature and deflection. The results are discussed. In most cases, ambient temperature influenced deflections to a greater degree than pavement temperature. For this reason, a flexible pavement design procedure should utilize ambient temperature.

Media Info

  • Pagination: 30 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00092425
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: HRC-30-FR Final Rpt.
  • Files: NTIS, TRIS, USDOT, STATEDOT
  • Created Date: Nov 5 1976 12:00AM