DISPERSION OF EMISSIONS FROM ASPHALT HOT-MIX

This 3-part study concluded that the Gaussian Dispersion Model should be used as a conservative determination of pollution concentrations likely to occur in the general vicinity of an asphalt plant, as a result of pugmill mixing operations. Three separate investigations were carried out: a series of computer runs using the Air Quality Display Model (AQDM); a worst case study using the same Gaussian dispersion models which serve for the AQDM and other meteorological models; a study using the fixed cylinder of "puff" model and an exact solution of the partial differential equation describing diffusion. Several examples are provided which illustrate the calculational procedure as well as a Fortran listing of the movable cylinder model. The fixed cylinder was the most conservative. The first two models have the advantage that they are currently used to predict pollutant concentrations. The second model represents a conservative approximation of the calculational procedure used in the AGDM model.

• Supplemental Notes:
  • A study sponsored by the Asphalt Institute under the Bernard E. Gray Research Grant.
• Corporate Authors:

  Asphalt Institute

  2696 Research Park Drive
  Lexington, KY  United States  40511-8480
• Authors:
  • Gentry, J
• Publication Date: 0

Media Info

• Features: Appendices;
• Pagination: 40 p.

Subject/Index Terms

• TRT Terms: Air pollution; Asphalt; Asphalt plants; Concentration (Chemistry); Contaminants; Diffusion (Optics); Forecasting; Mathematical models; Pollutants
• Identifier Terms: FORTRAN (Computer program language)
• Uncontrolled Terms: Concentration; Models
• Old TRIS Terms: Gaussian plume model
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00163577
• Record Type: Publication
• Report/Paper Numbers: RR-75-3
• Files: TRIS
• Created Date: Mar 14 1978 12:00AM