A System for Asphalt Fume Generation

Details

• Personal Author:
  Afshari A ; Frazer D ; Goldsmith T ; Stone S
• Description:
  There is concern during road paving operations over the potential adverse health effects from exposure to asphalt fume. In order to study this problem a system was developed to expose small laboratory animals to a precisely controlled concentration of asphalt fumes. The fumes were generated as asphalt flowed over a heated metal plate and were entrained in heated conditioned air, which passed over the plate. After passing though the generator, the fume entered the exposure chamber through a heated pipe. The mass concentration of the fume aerosol within the chamber was estimated with a light scattering device and was used to control the amount of heated, conditioned diluent air that was added to the fume to maintain its concentration within desired limits. A second feedback system used a computer controlled needle value to regulate. the flow of asphalt across the metal plate. Additional control systems were used to sustain constant airflows and temperatures throughout the system. Specialized software. was developed to continuously monitor and record temperatures, gas flows and fume concentration within the system for analysis. Laboratory generated asphalt fume was shown to be similar to field fume in terms of chemical composition. [Description provided by NIOSH]
• Subjects:
  Hydrocarbons Laboratories Occupational Health Safety
• Keywords:
  Asphalt-fumes Exposure-chambers Exposure-methods Laboratory-equipment Laboratory-techniques
• ISBN:
  9781930636019
• Publisher:
  Medical and Engineering Publishers, Inc.
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  OSHA Region 3 ; West Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  HELD - Health Effects Laboratory Division
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  321-322
• NIOSHTIC Number:
  nn:20022357
• Citation:
  Biomedical engineering recent developments: proceedings of the Twenty First Southern Biomedical Engineering Conference, September 28 - 29, 2002, Bethesda, Maryland. Vossoughi J, ed. Washington, DC: Medical and Engineering Publishers, Inc., 2002 Sep; :321-322
• Editor(s):
  Vossoughi J
• Federal Fiscal Year:
  2002
• Peer Reviewed:
  False
• Source Full Name:
  Biomedical engineering recent developments: proceedings of the Twenty First Southern Biomedical Engineering Conference, September 28 - 29, 2002, Bethesda, Maryland
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:f92aee606279b81ae793a6d64fe7f54cd490a80a4fb8da1a8f295f77b2126e1910e60888e2b243a20d43ec4fe6a49f144098d414b8c96d5b32021ff9cd50a894
• Download URL:
  https://stacks.cdc.gov/view/cdc/199163/cdc_199163_DS1.pdf
• File Type:
  [PDF - 286.61 KB ]