Use of rheology to study binder permanent deformation

Bituminous mixtures used in flexible pavements are complex materials consisting of a high volume fraction of graded aggregate, air voids and binder. An understanding of the permanent deformation behaviour of these mixtures depends partially on the elucidation of the behaviour of the binder. Asthe binder is a viscoelastic material, its behaviour must be characterised using test methods that take into account the rate, or time, of loading and temperature. Recently, rheology has been widely used to categorise andevaluate bituminous binders according to their performance-related properties. A dynamic shear rheometer was used to study the steady state permanent deformation of binders over a range of temperatures. A 100/150 pen bitumen was used. Also, two mastics were studied at similar filler/binder ratios to those that exist in two asphalt mixtures. The oscillation technique was used in the DSR to arrive at steady state stress levels for different loading rates, where the materials begin to deform plastically. The sets of data were then plotted on a strain rate versus steady state stress graph. The Modified Cross Model was used to describe the permanent deformation properties of these binders at different temperatures. For the covering abstract of this conference please see ITRD E133040.

  • Authors:
    • HASSAN, M M
    • KHALID, H A
  • Publication Date: 2007-4


  • English

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Filing Info

  • Accession Number: 01054993
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Aug 6 2007 2:14PM