FUNDAMENTAL SIGNIFICANCE OF OLIENSIS SPOT TEST-QUANTITATIVE TESTS FOR HOMOGENEITY

THE SPOT TEST REACTS 'NEGATIVE' WITH ALL ASPHALTS IN WHICH THE INTERNAL PHASE RELATIONSHIP IS RELATIVELY STABLE, SO THAT THE LATTER CAN SUCCESSFULLY WITHSTAND THE STANDARDIZED FLOCCULATING FORCE EXERTED BY THE CONDITIONS OF THE TEST, AND REACTS 'POSITIVE' WITH ALL ASPHALTS IN WHICH THE INTERNAL PHASE RELATIONSHIP IS RELATIVELY UNSTABLE (FROM WHATEVER CAUSE - WHETHER OVERHEATING, OR PRESENCE OF NATURALLY PRESENT OR ARTIFICIALLY ADDED INCOMPATIBLE BODIES), SO THAT IT IS INCAPABLE OF WITHSTANDING THAT FLOCCULATING FORCE. TO SUPPLEMENT THE XYLENE EQUIVALENT PREVIOUSLY RELEASED FOR THE QUANTITATIVE DETERMINATION OF HETEROGENEITY, TWO ALTERNATE METHODS FOR THE QUANTITATIVE DETERMINATION OF HOMOGENEITY ARE PROPOSED: ONE, THE NEGATIVE PERIOD, OR THE NUMBER OF DAYS THE STANDARD NAPHTHA-ASPHALT MIXTURE CAN STAND BEFORE BECOMING POSITIVE, AND THE OTHER, THE HEXANE RESISTANCE, BEING BASED UPON THE MINIMUM NUMBER OF INCREMENTS OF HEXANE REQUIRED TO MAKE A NEGATIVE STANDARD NAPHTHA-ASPHALT MIXTURE TEST POSITIVE. THESE QUANTITATIVE METHODS WILL AID IN DETECTING IN NEGATIVE ASPHALTS (1) VERY SLIGHT DEGREES OF OVERHEATING OR CRACKING, AND (2) THE PRESENCE OF SMALL ADDED PERCENTAGES OF POSITIVE ASPHALTS.

  • Supplemental Notes:
    • Vol 41, No 1108
  • Authors:
    • Oliensis, G L
  • Publication Date: 1941

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Filing Info

  • Accession Number: 00210909
  • Record Type: Publication
  • Source Agency: Highway Research Board Bibliography
  • Files: TRIS
  • Created Date: May 13 1994 12:00AM