Fatigue Behaviour Modelling in the Mechanistic Empirical Pavement Design

  • Mofreh F. Saleh
Conference paper
Part of the RILEM Bookseries book series (RILEM, volume 4)

Abstract

The Mechanistic empirical pavement design is based on modelling certain modes of failure for the different pavement materials. In the Australian and New Zealand guidelines, the mechanistic pavement design is based on modelling fatigue and permanent deformation as the two major modes of failures. The guidelines use the Shell fatigue performance function to model fatigue behaviour of asphalt mixes. However, there are wide range of asphalt mixes on New Zealand roads and they are all behave differently regarding their fatigue and permanent deformation performance. Therefore, the question here, can one fatigue model accurately fit the fatigue performance of all different asphalt mixes. This research examined the fatigue behaviour of two different types of dense graded hot mix asphalts, the first is made of aggregate with maximum nominal size 10 mm and the second with 14 mm maximum nominal sizes. The effects of air voids in the total mix and aggregate gradations on the fatigue behaviour were compared. It was found that the aggregate gradations have significant effect on the fatigue life with finer mixes have significantly higher fatigue lives compared to the coarser gradations. In addition, air voids in the total mix have a profound effect on the fatigue behaviour.

Keywords

Fatigue Life Fatigue Behaviour Binder Content Pavement Design Fatigue Model 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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    Austroads, Pavement Design, A Guide to Structural Design of Road Pavements (2008)Google Scholar
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    Shell Pavement Design Manual - Asphalt Pavements and Overlays for Road Traffic (1978)Google Scholar
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    Saleh, M.: Methodology for the Calibration and Validation of Shell Fatigue Performance Function Using Experimental Laboratory Data. Journal of the Road and Transport Research 19(4), 13–22 (2010)Google Scholar
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    Saleh, M.: Implications of Using Calibrated and Validated Performance Transfer Functions in the Mechanistic Empirical Pavement Design Procedure. International Journal of Pavement Research and Technology 4(2), 111–117 (2011)Google Scholar

Copyright information

© RILEM 2012 2012

Authors and Affiliations

  • Mofreh F. Saleh
    • 1
  1. 1.Department of Civil and Natural ResourcesUniversity of CanterburyChristchurchNew Zealand

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