MICROFILM DURABILITY TEST FOR ASPHALT

A DURABILITY TEST FOR ASPHALT USING THE SLIDING PLATE (MICROFILM) VISCOMETER IS DESCRIBED AS FOLLOWS: A 5 MICRON FILM OF ASPHALT IS AGED ON GLASS PLATES FOR 2 HOURS AT 225 F. THE HARDENING WHICH OCCURS IS DETERMINED BY MEASURING THE VISCOSITY OF THE ASPHALT BEFORE AND AFTER AGING. THE DURABILITY IS REPORTED AS AN AGING INDEX WHICH IS THE RATIO OF THE VISCOSITY OF THE AGED SAMPLE TO THAT OF THE ORIGINAL, BOTH VISCOSITIES HAVING BEEN DETERMINED AT THE SAME RATE OF SHEAR ( 5 X MINUS 100 SEC). A LOW AGING INDEX SIGNIFIES A MORE DURABLE ASPHALT. THE ORIGINAL VISCOSITY IS OBTAINED FROM A FILM PREPARED IN THE SAME MANNER BUT AGED. DATA WERE ALSO OBTAINED ON SAMPLES AGED IN NITROGEN. FROM THE DATA OBTAINED BY AGING IN AIR AND NITROGEN, INFORMATION IS OBTAINED CONCERNING THE RELATIVE EFFECTS OF OXIDATION AND VOLATILIZATION.

• Supplemental Notes:
  • Vol 24, P 31
• Authors:
  • Griffin, R L
  • Miles, T K
  • Penther, C J
• Conference:
  • Assoc Asphalt Paving Technol Proc
• Publication Date: 1955

Subject/Index Terms

• TRT Terms: Air; Asphalt hardening; Asphalt tests; Before and after studies; Durability; Microforms; Nitrogen; Oxidation; Viscometers; Viscosity; Volatilization
• Old TRIS Terms: Aging; Microfilms; Vaporizing
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00210947
• Record Type: Publication
• Source Agency: Highway Research Board Bibliography
• Files: TRIS
• Created Date: Jun 3 1994 12:00AM