Inclusion of Moisture Effect in Fatigue Test for Asphalt Pavements

Damage of asphalt mixes due to moisture is a complex phenomenon. Conventional moisture-related tests do not well simulate field conditions, in which traffic loading is an essential component. Flexural beam test has been widely used in current pavement design to evaluate material properties of asphalt mixes, but has not been well explored to study the moisture effect. This paper developed a typical fatigue-based test procedure for comparative evaluation of moisture sensitivity of different mixes. It is a controlled-strain flexural beam fatigue test performed at 20 degrees C, 10 Hz, and 200 me on specimens pre-saturated under 635 mm-HG vacuum for 30 minutes and preconditioned at 60 degrees C for one day. Test results showed that the fatigue based test procedure can distinguish mixes with different moisture sensitivities, and give a ranking of mixes consistent with prior field experience. An extension of the test procedure for use in the pavement design was also discussed, but further work is needed to implement the test procedure.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784409619
• Corporate Authors:

  American Society of Civil Engineers

  Transportation and Development Institute
  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400

  China Academy of Transportation Sciences

  Ministry of Communications
  Beijing,   China  100029
• Authors:
  • Lu, Qing
  • Harvey, John T
• Conference:
  • The First International Symposium on Transportation and Development – Innovative Best Practices (TDIBP 2008)
  • Location: Beijing , China
  • Date: 2008-4-24 to 2008-4-26
• Publication Date: 2008

Language

• English

Media Info

• Media Type: Print
• Features: References; Tables;
• Pagination: pp 498-504
• Monograph Title: Transportation and Development Innovative Best Practices 2008: Proceedings of the First International Symposium

Subject/Index Terms

• TRT Terms: Asphalt mixtures; Asphalt pavements; Fatigue (Mechanics); Fatigue tests; Flexural strength; Moisture content; Moisture damage; Pavement design; Sensitivity analysis; Traffic loads
• Subject Areas: Freight Transportation; Highways; Materials; Pavements; I23: Properties of Road Surfaces; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01113953
• Record Type: Publication
• ISBN: 9780784409619
• Files: TRIS
• Created Date: Oct 29 2008 7:24AM