THE ROLLING THIN-FILM CIRCULATING OVEN- AN IMPROVED ROLLING THIN-FILM OVEN TEST

THE THIN-FILM OVEN TEST (TFO), ASTM D 1754-69, IS WELL ESTABLISHED AND FUNCTIONAL; HOWEVER, IT REQUIRES 5 H EXPOSURE TIME. THE ROLLING THIN-FILM OVEN TEST (RTFO), ASTM D 2872-70 IS ALSO FUNCTIONAL. ITS PRECISION IS BETTER, AND IT IS FASTER TO DO. UNFORTUNATELY, THE TWO EXPOSURES DIFFER ENOUGH SO THEY SHOULD NOT BE USED INTERCHANGEABLY WITHOUT SEPARATE SPECIFICATION LIMITS FOR EACH TEST. A GOOD SOLUTION TO THIS DILEMMA WOULD BE ANOTHER OVEN EXPOSURE WHICH HAS THE ADVANTAGES OF THE RTFO (THAT IS SHORT EXPOSURE TIME AND HIGH PRECISION) AND WHICH, AT THE SAME TIME, AFFECTS ASPHALTS IN THE SAME WAY THE TFO. THIS HAS BEEN SUBSTANTIALLY ACCOMPLISHED BY CONVERTING THE RTF OVEN FROM A CONVENTIONAL OVEN TO A FORCED-DRAFT OVEN. THE ADDED CIRCULATION CAUSES MORE VOLATILE LOSS TO OCCUR. THIS ROLLING THIN-FILM CIRCULATION (RTO-C) OVEN TEST NOT ONLY GIVES EXPOSURES VERY CLOSE TO THE WELL-ACCEPTED TFO; BUT IT IS JUST AS FAST AS THE RTFO TO PERFORM. IT IS SUGGESTED THAT THIS NEW OVEN EXPOSURE BE CONSIDERED AS A REPLACEMENT FOR THE RTFO AND INTERCHANGEABLE WITH THE TFO IN SPECIFICATIONS. /AUTHOR/

• Supplemental Notes:
  • ASTM STP 532
• Authors:
  • Schmidt, R J
• Publication Date: 1973-6

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 52-65
• Serial:
  • ASTM Special Technical Publications
  • Publisher: American Society for Testing and Materials (ASTM)

Subject/Index Terms

• TRT Terms: Accuracy; Asphalt; Methodology; Oven tests; Oxidation; Thin films
• Uncontrolled Terms: Thin film oven test
• Old TRIS Terms: Circulation; Rolling thin film
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00211837
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 27 1974 12:00AM