The purpose of this study was to determine the most promising kinds of equipment to develop for the purpose of evaluating the structural condition of pavements. All areas of technology both in the highway field and in fields outside of highway technology were to be studied to determine the most promising types of equipment. In order to decided what needed to be measured in determining the structural condition of a pavement, all 50 states, some Canadian provinces, and some city and county agencies were asked to name the factors they consider to be important in their assessment of pavement condition, and state how heavily they weight each one. Results of this survey of current pavement condition rating methods are included in this report. The two most important variables were found to be stiffness and cracking. Highway equipment reviewed include static deflection, steady-state vibration, impulse, and wave propagation techniques. Non-highway equipment include acoustic holography, infrared microscope, vibroseis, photo diode scanners, microwave sensing, and the duomorph. Several new types of measurement and analysis schemes were proposed. Ten pieces of equipment were recommended for future development, two of which were to be developed in Phase II of this study: the duomorph and the mobile acoustic crack detector.

  • Corporate Authors:

    Texas Transportation Institute

    Texas A&M University System, 1600 E Lamar Boulevard
    Arlington, TX  United States  76011

    Federal Highway Administration

    Engineering Research and Development Bureau, 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Lytton, R L
    • Moore, W M
    • Mahoney, J P
  • Publication Date: 1975-3

Subject/Index Terms

Filing Info

  • Accession Number: 00130536
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: FHWA-RD-75- 78 Final Rpt., FCP-35D1-002
  • Contract Numbers: DOT-FH-11-8264
  • Files: NTIS, TRIS, USDOT
  • Created Date: Mar 29 1976 12:00AM