DETERMINATION OF THE LONG TERM EFFECT OF AIR ON A THIN FILM OF BITUMEN HEATED AT 100 DEGREES C (ARRB DURABILITY TEST)

This method determines the time of exposure for a thin film of a bitumen heated at 100 degrees C in air, in the absence of light, to reach an apparent viscosity of 5.67 log Pa.s at 45 degrees C and a shear rate of .005 s minus 1. Application has so far been restricted to Class 160 bitumens which have been subjected to the Rolling Thin-Film Oven (RTFO) test treatment. When the relatively non-volatile residual bitumens used for paving purposes are tested, the hardening produced by the treatment is mainly due to chemical attack by oxygen. If the procedure is used to evaluate other types of bituminous paving binders, a check should be done to determine whether the observed hardening is caused, in part, by evaporation of volatile constituents. A loss in mass of a binder film greater than two per cent can be detected by weighing a test bottle on an anlytical balance before and after exposure. /Author/

• Record URL:
  http://arrbknowledge.com
• Corporate Authors:

  ARRB

  Melbourne, Victoria  Australia 
• Authors:
  • WITT, H P
• Publication Date: 1976-12

Media Info

• Features: Appendices; Figures;
• Pagination: 23 p.

Subject/Index Terms

• TRT Terms: Air; Binders; Bitumen; Concrete hardening; Durability; Hardness; Oven tests; Oxygen; Shear rate; Thin films; Viscosity
• Uncontrolled Terms: Thin film oven test
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00163558
• Record Type: Publication
• Report/Paper Numbers: ATM No. 3
• Files: TRIS, ATRI
• Created Date: Nov 9 1977 12:00AM