REPORT ON EMISSIONS FROM ASPHALT HOT MIXES

A comprehensive analysis was performed of 8 sets of samples of emissions originating from petroleum asphalt during the hot-mix process for preparation of asphalt. Samples were collected on 4 days at two locations involving four asphalt cements of varying characteristics from three refineries. All gaseous substances, vapors and particulates associated with asphalt including hydrocarbons, carbon monoxide, nitrogen dioxide, volatile sulphur compounds, ozone, aldehydes, phenols, metals and polynuclear aromatics were identified using recognized sampling techniques and analytical procedures. The results of these analyses indicate that no significant air pollution or employee health problems can be expected or associated with these emissions. The gaseous substances and particulates were at extremely low concentrations, and were well within the current OSHA standards for workroom conditions. Despite the exagerated sampling conditions, the asphalt emissions compare favorably with national air quality standards promulgated by EPA. Test data indicate no significant difference in the amount or composition of emissions from asphalt from different sources or used in different hot mix plants. The results suggest that the TLV limit for asphalt (petroleum) fumes is too limiting and not accurately defined. The results also indicate that health hazards will not result from polynuclear aromatics in emissions from hot-asphalt paving mixes. Substantial difference is noted between petroleum asphalt and coal tar, and it is suggested that these two materials be not placed in the same category by regulatory agencies.

  • Supplemental Notes:
    • Presented at the Division of Petroleum Chemistry, Inc. American Chemical Society, Chicago, Illinois Mtg., August 1975.
  • Corporate Authors:

    Asphalt Institute

    2696 Research Park Drive
    Lexington, KY  USA  40511-8480
  • Authors:
    • Puzinauskas, V P
    • Corbett, L W
  • Publication Date: 1975-5

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 20 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00126292
  • Record Type: Publication
  • Report/Paper Numbers: RR-75-1A
  • Files: TRIS
  • Created Date: Oct 18 1975 12:00AM