INFLUENCE OF CLIMATOLOGICAL CONSIDERATIONS UPON THE CONSTRUCTION OF ASPHALT PAVEMENTS

This paper presents a procedure to calculate realistically the stresses thermally induced in asphalt pavement, taking into consideration the relaxation behaviour and stiffness of asphalt mixes. Its results offer a possiblity of simulating the real conditions of asphalt pavements, stressed by traffic loads and climate. It should help engineers to make further progress in the construction and economical design of asphalt pavements by reducing their maintenance costs during their useful life. The general calculation procedure is based on an exponential function resulting from a Maxwell model that already allows for the rheological behaviour of asphalt pavements. Calculations are presented in detail of thermally induced stresses for: (1) four laboratory asphalt mixes; (2) asphalt mixes with bitumen of any hardness; (3) laboratory and model asphalt variants. The third case considers a more realistic situation, but all cases include numerical results. The procedure presented here for flexible pavements contributes to the prevention of the appearance of premature cracking due to fatigue, when integrated into a modern theoretical calculation model for constructing flexible pavements. The paper offers a possibility of calculating realistic thermally induced stresses for asphalt pavements according to their temperatures.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/31984593
• Corporate Authors:

  Permanent International Assoc of Road Congresses

  27 rue Guenegaud
  Paris,   France 
• Authors:
  • POHLMANN, P
• Publication Date: 1992

Language

• Undetermined

Media Info

• Features: References;
• Pagination: p. 73-91
• Serial:
  • Routes/Roads
  • Issue Number: 276
  • Publisher: World Road Association (PIARC)
  • ISSN: 0004-556X
  • Serial URL: http://www.piarc.org/en/publications/Routes-Roads-Magazine/

Subject/Index Terms

• TRT Terms: Bitumen; Calculation; Flexible pavements; Pavement design; Rheology; Stresses; Temperature
• ITRD Terms: 4963: Bitumen; 6464: Calculation; 2944: Flexible pavement; 3055: Pavement design; 5442: Rheology; 5575: Stress (in material); 6722: Temperature
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 00630629
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD
• Created Date: Jul 1 1993 12:00AM