High-Float Emulsion Residue: A New Rheological Model Based on the Existence of a Yield Stress

• Author / Creator

  Suda, Justin P

• “High-float” (HF) emulsions are dispersions of micron-sized bitumen droplets in water, with a special type of anionic surfactant functioning as stabilizer. By allowing the water to evaporate from an HF emulsion, what remains is called a “high-float emulsion residue.” Although indistinguishable in appearance from the original bitumen, the HF emulsion residue possesses rheological properties that are remarkably different from those of bitumen. In particular, the HF residue exhibits a yield stress which prevents it from draining under the influence of gravity even at elevated temperatures. In this study, a new rheological model is proposed for the HF emulsion residue. An experimental procedure is also introduced to measure the yield stress using dynamic shear rheometry.

• Subjects / Keywords

  • Viscoelastic
  • Dynamic shear rheometer
  • Emulsions
  • Asphalt
  • Rheology
  • Bitumen
  • Road emulsion
  • High float
  • Yield stress
  • Float test
  • Binder

• Graduation date

  Fall 2016

• Type of Item

  Thesis

• Degree

  Master of Science

• DOI

  https://doi.org/10.7939/R3GF0N20F

• License

  This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.