PAVEMENT EVALUATION BY DEFLECTION

The state-of-the-art research phase is reported of an investigation of the techniques and interpretation employed in the evaluation of unbound granular base course pavements by the Benkelman Beam Principle. A method is developed for evaluating the performance of flexible pavements based on surface deflection measurements through a pilot study of chip-sealed, unbound granular basecourse pavements. A quantitative relationship is established between the surface deflection characteristics of sound pavements and the structural variables of the pavement such as the thickness and characteristics (aggregate type, grading) of the base course layer. The flexible pavement structure is discussed as well as the pavement system and its behavior. The distress or limiting response of the pavement system and the observations of distress are also discussed. Criteria for evaluating performance (functional and mechanistic) are reviewed. The measurement of the surface deformation of a pavement is detailed, as well as the prediction of such deformation. Details are given of the mechanistic and functional evaluation of performance. The measurement of serviceability is detailed.

  • Corporate Authors:

    National Roads Board, New Zealand

    Road Research Unit
    Wellington,   New Zealand 
  • Publication Date: 1974

Media Info

  • Features: Figures;
  • Pagination: 35 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00264888
  • Record Type: Publication
  • Report/Paper Numbers: RRU Bulletin 21
  • Files: TRIS
  • Created Date: Feb 11 1975 12:00AM