TECHNICAL NOTE NO. 2 - REVISION OF NAASRA INTERIM GUIDE TO PAVEMENT THICKNESS DESIGN

The design procedures in the NAASRA Interim Guide to Pavement Thickness Design (1979) may be classified as empirical (Procedures F1 and F3B) or partly mechanistic (Procedures F2 and F3A). The mechanistic elements of these procedures consist of predicting and limiting the surface deflection as a means of controlling the horizontal tensile strain in the asphalt surfacing or other bound layers. While this approach is simple to apply, and has a link with the common field practice of measuring deflections, it is only a rough control on strain levels. A more rigorous and consistent approach is proposed for the revised NAASRA Guide, based on strain prediction by structural analysis. The particular strains of interest are those associated with the primary modes of distress to which pavements are susceptible: cracking and rutting. (TRRL)

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  http://arrbknowledge.com
• Availability:
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• Corporate Authors:

  ARRB

  Melbourne, Victoria  Australia 
• Authors:
  • POTTER, D W
  • DONALD, G S
• Publication Date: 1985-6

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 106-112
• Serial:
  • Australian Road Research
  • Volume: 15
  • Issue Number: 2
  • Publisher: ARRB
  • ISSN: 0005-0164

Subject/Index Terms

• TRT Terms: Bituminous overlays; Design methods; Design standards; Flexible pavements; Guidelines; Pavement cracking; Pavement design; Rigid pavements; Ruts (Pavements); Thickness
• Uncontrolled Terms: Rut
• Old TRIS Terms: Thickness design
• ITRD Terms: 8006: Australia; 5211: Cracking; 5586: Deflection; 2944: Flexible pavement; 5919: Modulus of elasticity; 3055: Pavement design; 2964: Rigid pavement; 3081: Rutting (wheel); 177: Specifications; 3096: Strengthening (pavement); 2950: Subgrade; 5933: Thickness
• Subject Areas: Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces;

Filing Info

• Accession Number: 00452873
• Record Type: Publication
• Source Agency: ARRB
• Files: ITRD, TRIS
• Created Date: Jul 31 1988 12:00AM