DEFORMATION OF ROAD PAVEMENTS: CORRELATION BETWEEN ELASTIC THEORY AND MEASURED BEHAVIOUR OF ROLLED-ASPHALT ROAD-BASES

This report gives the results of an investigation designed to assess whether a partial application of a structural method of pavement design predicts the deformation behaviour of fully flexible pavements with rolled asphalt road-bases more accurately than a conventional approach. An empirical correlation is derived between the rate of deformation of asphalt pavements and computed elastic stresses, strains and displacements. It is shown that this correlation is statistically more significant than a similar correlation derived from the same deformation data but relating deformation rate to layer thicknesses and subgrade strength. The stress/strain regression is used to derive deformation rates of some current designs: the results imply that, for fully flexible asphalt pavements designed for traffic intensities greater than about 8 million cumulative standard axles, the deformation rates will be significantly higher than originally expected. (A). /TRRL/

• Corporate Authors:

  Transport and Road Research Laboratory (TRRL)

  Wokingham, Berkshire  United Kingdom 
• Authors:
  • POTTER, J F
• Publication Date: 1977

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: 17 p.
• Serial:
  • ATZ - Automobil Technische Zeitschrift
  • Publisher: Franckhlsche Verlagshandlung

Subject/Index Terms

• TRT Terms: Base course (Pavements); Bitumen; Correlation analysis; Defects; Deformation; Deformation curve; Elasticity (Mechanics); Flexible pavements; Forecasting; Mathematical analysis; Methodology; Pavement design; Pavement distress; Pavements; Rolled asphalt; Stresses; Temperature; Testing
• Old TRIS Terms: Bases; Elastic theory
• ITRD Terms: 6471: Analysis (math); 4963: Bitumen; 5595: Deformation; 5912: Elasticity; 2944: Flexible pavement; 132: Forecast; 9102: Method; 3055: Pavement design; 2961: Roadbase; 5575: Stress (in material); 6722: Temperature
• Subject Areas: Data and Information Technology; Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 00170377
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: TRRL Lab. Rpt. 784 Monograph
• Files: ITRD, TRIS, ATRI
• Created Date: Jun 28 1978 12:00AM