BITUMIN DURABILITY - MEASUREMENT BY OXYGEN ABSORPTION

INVESTIGATIONS WERE PERFORMED IN AN EFFORT TO ASSURE THE OXIDIZABILITY OF BITUMENS OF DIFFERENT ORIGIN; TO STUDY THE OXIDIZABILITY OF THEIR DIFFERENT CONSTITUENTS AND TO GAIN AN UNDERSTANDING OF AND CONTROL OVER THE OXIDATION PROCESS. THE RATE OF OXIDATION OF BITUMENS IN THE LIGHT AND IN THE DARK WAS MEASURED AT AMBIENT TEMPERATURE WITH STIRRED SOLUTIONS IN AN INDIFFERENT SOLVENT TO AVOID DIFFUSION EFFECTS. THE RATE OF OXIDATION WAS INCREASED BY LIGHT AND BY TRACE METALS. ALL CHROMATOGRAPHIC SEPARATION FRACTIONS PREPARED FROM BITUMENS, OXIDIZED IN THE LIGHT BUT ASPHALTENES AND RESINS OXIDIZED IN THE DARK. THE CONCENTRATION OF REACTIVE COMPONENTS IN DARK COLORED BITUMENS IS HIGHER THAN IN LIGHT COLORED ONES. THE DARK COLOR, HOWEVER, PROTECTS AGAINST EXCESSIVE OXIDATION IN THE LIGHT. FEW OF THE KNOWN OXIDATION INHIBITORS AFFECTED BITUMEN OXIDATION. ACTIVATORS ACCELERATED OXIDATION IN THE LIGHT BUT HAD LITTLE EFFECT IN THE DARK. EXPERIMENTAL RESULTS WERE COMPARED WITH THOSE OBTAINED FROM WEATHER-O-METER EXPERIMENTS. FURTHER STUDY OF THE EFFECT OF ADDITIVES WITH BITUMENS IN SOLUTION IS INDICATED AS DESIRABLE.

  • Corporate Authors:

    Ind Eng Chem Process Des Develop

    ,    
  • Authors:
    • Knotnerus, J
  • Publication Date: 1972

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 411-22
  • Serial:
    • Volume: 11
    • Issue Number: 4

Subject/Index Terms

Filing Info

  • Accession Number: 00211782
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 5 1973 12:00AM