IP 212: Determination of viscosity of bitumen emulsions- Engler method

Document options

EI Technical Partners get free access to publications. You will need to Login or Register here

  • Method adopted/last revised: 1992
  • Method reapproved: 2004
  • REF/ISBN: IP212-2939444
  • Status: Current
  • First printed in STM books: February 1992


This method describes a procedure for the determination of the viscosity of bitumen emulsions in arbitrary units at 20 °C using the Engler Viscometer.

The flow of bitumen road emulsions is non-Newtonian in that the relationship between shear stress and rate of shear is not linear, but under the conditions of the test the divergence from Newtonian behaviour does not normally lead to any difficulty in obtaining reproducible results. Nevertheless if measurements are attempted at low temperatures or if the emulsion has an abnormally high viscosity - exceeding 25 degrees Engler for example - such difficulties may arise.

The viscosity of road emulsions may be changed permanently by violent agitation, by heating or chilling, or by long storage at ambient temperature.

Members Benefits

Are you an EI Member? If yes, register/log in now to ensure you receive free access or discounts to EI publications.

If you are not a Member, why not join today and receive all of the benefits of EI Membership? EI Members are entitled to a 25% discount on most EI publications.