A questionnaire to determine the experience and practice of roading authorities in the use of Benkelman Beam deflections and overlavs was circulated among county and municipal authorities and Ministry of Works offices. The information and data received has been reported and analysed, and is considered to be representative of New Zealand practice. The main matters reported relate to the following in terms of flexible pavement: (a) Deflection equivalencies of materials. (b) Seasonal variation of deflections. (c)'Bedding down' characteristics of unbound granular layers as indicated by reduction in deflections. (d) Effectiveness of layers in reduction of surface deflections. The report proposes that a standard method of deflection measurement and analysis be recommended for use to enable development of a standard'good' practice for the following purposes: (1) Control of uniformity during construction. (2) To indicate change in structural behavious with time or due to trafficking. (3) As a guide to the structural design standard achieved by construction or overlaying. (4) To indicate strengthening to be added to an existing surface to upgrade the pavement to a specified structural design standard; strengthening being either by pavement, or overlay to an existing pavement.

  • Corporate Authors:

    National Roads Board, New Zealand

    Road Research Unit
    Wellington,   New Zealand 
  • Authors:
    • SMITH, A D
  • Publication Date: 1973

Media Info

  • Features: Appendices; Tables;
  • Pagination: 26 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00260357
  • Record Type: Publication
  • Report/Paper Numbers: Bulletin No.116
  • Files: TRIS
  • Created Date: Oct 11 1974 12:00AM