Inclusion of Moisture Effect in Fatigue Test for Asphalt Pavements
Moisture damage in asphalt mixes is a complex phenomenon. Conventional tests, such as the tensile strength ratio test, do not fully simulate field conditions, in which traffic loading is an essential component. 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 20aC, 10 Hz, and 200£g£` on specimens pre-saturated under 635 mm-Hg vacuum for 30 minutes and preconditioned at 60aC for one day. Test results show that the fatigue based test procedure can distinguish mixes with different moisture sensitivities, and give a ranking of mixes consistent with prior 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.
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Corporate Authors:
500 Fifth Street, NW
Washington, DC United States 20001 -
Authors:
- Lu, Qing
- Harvey, John T
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Conference:
- Transportation Research Board 86th Annual Meeting
- Location: Washington DC, United States
- Date: 2007-1-21 to 2007-1-25
- Date: 2007
Language
- English
Media Info
- Media Type: CD-ROM
- Features: Figures; References; Tables;
- Pagination: 19p
- Monograph Title: TRB 86th Annual Meeting Compendium of Papers CD-ROM
Subject/Index Terms
- TRT Terms: Asphalt mixtures; Asphalt pavements; Cracking; Failure; Flexural strength; Moisture content; Moisture damage; Pavement design; Pavement performance; Pavements; Sensitivity analysis; Tensile strength; Tension tests; Traffic loads
- Uncontrolled Terms: Flexural cracking; Flexural failure; Mixture sensitivity analysis
- Subject Areas: Freight Transportation; Highways; Materials; Pavements; I23: Properties of Road Surfaces; I31: Bituminous Binders and Materials;
Filing Info
- Accession Number: 01044236
- Record Type: Publication
- Report/Paper Numbers: 07-2060
- Files: TRIS, TRB
- Created Date: Mar 21 2007 12:46PM