Measurement of Zero-Shear Viscosity in Asphalt

A widely accepted rheological parameter is zero shear viscosity (ZSV). The main focus of previous work has been unmodified bitumen. This paper discusses ZSV adoption for polymer modified bitumen (PMB) rheological property evaluation. The authors found that even at a very low 0.001 rad/s frequency level, PMB was unable to reach the steady ZSV condition in a limited time, and that the longer the recovery, the more sufficient elimination of viscosity impact there could be. Study results also show in comparison with the common creep test and recovery test, the multiple experimental recovery time test method is more reliable for determination of PMB's ZSV. There cannot be complete elimination, however, of the impact of the delay elastic strain and the delayed elastic recovery strain. The cross model's ZSV is higher than those of other methods, the rest of which lead to similar results. Not only is accurate measurement therefore critical in ZSV adoption for PMB evaluation, but scientifically defined viscous and elastic component division is also important.

  • Availability:
  • Authors:
    • Zhang, Xiaoning
    • Zou, Guilian
    • Xu, Jian
  • Publication Date: 2009-1

Language

  • English

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Filing Info

  • Accession Number: 01140817
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 22 2009 2:09PM