NITROGEN OXIDES IMPROVE ASPHALT

EFFECTS OF BLOWING ASPHALT WITH VARIOUS NITROGEN OXIDES WERE INVESTIGATED. AIR WAS REPLACED IN THE BLOWING PROCESS WITH A MIXTURE OF NITROGEN AND SMALL AMOUNTS OF NITRIC OXIDE, NITROUS OXIDE, NITROGEN DIOXIDE, PHOTOSENSITIZED NITROGEN DIOXIDE, AND A MIXTURE OF NITRIC OXIDE AND OXYGEN, RESPECTIVELY. TREATMENT OF ASPHALT FLUX WITH NITROGEN DIOXIDE, PHOTOSENSITIZED NITROGEN DIOXIDE, AND A NITRIC OXIDE-OXYGEN MIXTURE PRODUCED COATING-GRADE ASPHALTS MUCH FASTER THAN BLOWING WITH AIR. ASPHALTS THUS PRODUCED ARE MORE STABLE TO PHOTO-OXIDATION AND TO FILM RUPTURE AT ANY GIVEN RATE OF SHEAR THAN COMMERCIAL ASPHALTS FROM THE SAME FLUX.

  • Supplemental Notes:
    • Vol 49, No 11, PP 189-190
  • Publication Date: 1965-11

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Filing Info

  • Accession Number: 00210623
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 20 1994 12:00AM