TEMPERATURE EFFECTS IN BINDER FATIGUE AND HEALING TESTS

It is well known that continuous fatigue tests on laboratory mix samples induce a temperature increase inside the mix sample. Because the mechanical properties of bituminous materials are very temperature dependent, the temperature changes during fatigue tests may influence most of the fatigue failure criteria that are commonly used. This temperature increase is among other factors strongly dependent on the strain or stress level and on the cyclic frequency. In this study, the temperature increase during binder fatigue tests is estimated by a coupled thermo mechanical model, and compared to the experimentally measured temperature increase. Encouraging results are obtained by comparing the measured temperature increase to the calculated one. The model stiffness computation and the experimentally tested levels allow to conclude that the thermal effects in the shear binder fatigue tests presented are small, and have only a small interaction with the failure criteria, based on a 50% reduction in stiffness. The evolution of the temperature changes during binder fatigue tests may give a good indication of the onset of fatigue damage. Healing capacity of bituminous binders is the capacity of bitumen to recover partly or even completely after damage has occurred. In the present study, experimental evidence is presented that only a small part of the recovery of rheological properties observed in binder tests can be attributed to temperature effects. For the covering abstract see ITRD E121480.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9080288446
• Corporate Authors:

  FOUNDATION EURASPHALT

  PO BOX 255
  BREUKELEN,     3620 AG
• Authors:
  • BODIN, D
  • Soenen, H
  • DE LA ROCHE, C
• Publication Date: 2004

Language

• English

Media Info

• Features: References;
• Pagination: p. 1996-2004
• Serial:
  • PROCEEDINGS OF THE 3RD EURASPHALT AND EUROBITUME CONGRESS HELD VIENNA, MAY 2004
  • Volume: 2
  • Publisher: FOUNDATION EURASPHALT

Subject/Index Terms

• TRT Terms: Binders; Bituminous mixtures; Conferences; Elasticity (Mechanics); Fatigue (Mechanics); Mathematical models; Temperature
• ITRD Terms: 4948: Binder; 4967: Bituminous mixture; 8525: Conference; 5912: Elasticity; 5579: Fatigue (mater); 6473: Mathematical model; 6722: Temperature
• Subject Areas: Data and Information Technology;

Filing Info

• Accession Number: 00981047
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 90-802884-4-6
• Files: ITRD
• Created Date: Nov 3 2004 12:00AM