DETERMINATION AND TREATMENT OF ASPHALT VISCOSITY DATA

A SIMPLE AND CONVENIENT CONE-PLATE VISCOMETER HAS BEEN DEVELOPED FOR ASPHALTS. IT DETERMINES VISCOSITIES FROM 100 TO GREATER THAN 10 MILLION POISES AT TEMPERATURES FROM BELOW 32 TO 156 F AND AT SHEAR RATES FROM .001 TO .01SEC, REQUIRES NO MORE THAN 1.5 G OF SAMPLE, AND MAY BE USED WITH OR WITHOUT A RECORDER. THREE ASPHALTS HAVE BEEN STUDIED IN DETAIL. WHEN THE VISCOSITIES AT VARIOUS SHEAR RATES AND TEMPERATURES ARE SHIFTED TO A SELECTED REFERENCE TEMPERATURE , THEY YIELD A MASTER CURVE COVERING A WIDER RANGE OF SHEAR RATES THAN IS POSSIBLE BY DIRECT MEASUREMENT. THE MASTER CURVE CORRELATES SHEAR RATES AND TEMPERATURE ENCOUNTERED IN SERVICE, IN STABILITY TESTS, AND IN VISCOSITY MEASUREMENTS FOR SPECIFICATION PURPOSES. A SIMPLE EQUATION FITS THE MASTER CURVE WELL AND CAN BE COMBINED WITH THE WALTHER EQUATION TO GIVE AN EQUATION DESCRIBING THE DEPENDENCE OF VISCOSITY ON BOTH SHEAR RATE AND TEMPERATURE.

Media Info

  • Media Type: Print
  • Features: Figures; Photos; References;
  • Pagination: pp 27-37
  • Monograph Title: Bituminous materials and mixes
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00210526
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Dec 12 1994 12:00AM