TRACKING OF BITUMINOUS MIXTURES

ORNIERAGE DES ENROBES BITUMINEUX

The authors recall that creep is a permanent deformation phenomenon of flexible pavement layers, the existence of which is linked to the visco-elastic behaviour of binders used to ensure the cohesion of aggregates; its occurence rises in frequency with the duration and number of load application. There exist two different processes, which explain the occurrence of permanent deformations: creep itself caused by the application of a static load, and the accumulation of residual deformation due to repetitive loading. Among the inconveniences resulting from this phenomenon, the following can be cited: decrease in traffic safety because of the deformation of the road profile and presence, in wet weather, of a thick permanent water film on the road; danger of excessive saturation of pavement layers through the formation of water puddles; difficulties for the maintenance crews to counteract deformations and need to remove the bituminous mixtures before tracking. The aim of the study is to list the various standard and new laboratory tests for studying creep and to compare their results with pavement behaviour. An attempt is made to cite the main principles of mix design which seem to be the most likely to succeed in preventing tracking. Special mention is made of the Duriez-Marshall tests, the cone penetrometer Hubbard field test and new tests such as tests on cold-coated bituminous mixtures, static and dynamic tests and tests on hot-coated mixtures. The covering abstract of the conference is IRRD abstract no. 101124. /TRRL/

• Supplemental Notes:
  • Taken from Journees d'information bitumes et enrobes bitumine.
• Corporate Authors:

  Laboratoire Central des Ponts et Chausees (LCPC)

  Boulevard Lefebvre 58
  Paris Cedex 15,   France  F-75732
• Authors:
  • Barbe
  • Bardet
  • Bonnot
  • Chanut
  • Dinh
  • Harlin
  • Kennel
  • Passebon
  • Uge
• Publication Date: 1972

Language

• French

Media Info

• Pagination: p. 30
• Serial:
  • Publication of: Laboratoire Central des Ponts et Chaussees
  • Publisher: Laboratoire Central des Ponts et Chausees (LCPC)

Subject/Index Terms

• TRT Terms: Accelerated tests; Bitumen; Bituminous mixtures; Cold coated materials; Cone penetrometers; Cracking; Creep; Deformation; Dynamics; Flexible pavements; Highway maintenance; Hot coated materials; Laboratories; Laboratory tests; Loads; Mix design; Moisture content; Pavement layers; Penetrometers; Repeated loads; Statics; Tests; Time; Tracking systems; Viscoelasticity
• Uncontrolled Terms: Loading; Tracking; Wet conditions
• ITRD Terms: 4963: Bitumen; 4967: Bituminous mixture; 4988: Cold coated material; 5532: Compression; 6178: Cone penetrometer; 8525: Conference; 4732: Creep (mater); 5595: Deformation; 5473: Dynamics; 6273: Gyratory compactor; 4997: Hot coated material; 6282: Hubbard field; 6237: Laboratory (not an organization); 5567: Load; 6290: Marshall; 4714: Mix design; 9069: Residual; 5531: Shear; 5433: Statics; 6255: Test
• Subject Areas: Highways; Materials; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00125176
• Record Type: Publication
• Source Agency: Laboratoire Central des Ponts et Chausees (LCPC)
• Report/Paper Numbers: Conf Paper
• Files: ITRD, TRIS
• Created Date: Nov 18 1975 12:00AM