Analysis of Flexible Pavements for Viscoelastic Response

The theory of viscoelasticity and its application in the modelling of flexible pavement is well documented in literature. This paper demonstrates the use of the Burger model, a constitutive rheological model to investigate the linear visco-elastic (LVE) behavior of bituminous layers. The effect of temperature on viscoelastic bituminous layers is also studied. A simple pavement section as per the guidelines of Indian Roads Congress (IRC):37-2012 has been chosen to show the creep formation behavior of bituminous layers. The pavement responses obtained from the computer program, KENLAYER, shows three stages in strain; an instantaneous elastic strain, a delayed elastic strain and viscous creep strain for various temperatures from 20° to 40°C. A comparison of the effect of temperature variation on the horizontal tensile strain at the bottom of the bituminous layer is done by considering the bituminous layer as elastic and viscoelastic, separately. Results show that the viscoelastic characterization of this layer yielded a high rate of increase in tensile strain with an increase in temperature, when compared to elastic characterization. There is an almost 60% decrease in fatigue life with an increase in temperature from 20° to 40°C.

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  • Supplemental Notes:
    • Abstract reprinted with permission from the publisher.
  • Authors:
    • Kumar, Girish
    • Dilip, Deepthi Mary
    • Babu, G L Sivakumar
  • Publication Date: 2015-8

Language

  • English

Media Info

  • Media Type: Print
  • Features: Appendices; Figures; References; Tables;
  • Pagination: pp 41-50
  • Serial:
    • Indian Highways
    • Volume: 43
    • Issue Number: 8
    • Publisher: Indian Roads Congress
    • ISSN: 0376-7256

Subject/Index Terms

Filing Info

  • Accession Number: 01576701
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 15 2015 12:46PM