Factory Performance Evaluations of Engineering Controls for Asphalt Paving Equipment

Details

• Personal Author:
  Brumagin TE ; Mead, Kenneth R. ; Mickelsen, Ronald L.
• Description:
  This article describes a unique analytical tool to assist the development and implementation of engineering controls for the asphalt paving industry. Through an agreement with the U.S. Department of Transportation, the National Asphalt Pavement Association (NAPA) requested that the National Institute for Occupational Safety and Health (NIOSH) assist U.S. manufacturers of asphalt paving equipment with the development and evaluation of engineering controls. The intended function of the controls was to capture and remove asphalt emissions generated during the paving process. NIOSH engineers developed a protocol to evaluate prototype engineering controls using qualitative smoke and quantitative tracer gas methods. Video recordings documented each prototype's ability to capture theatrical smoke under "managed" indoor conditions. Sulfur hexafluoride (SF6), released as a tracer gas, enabled quantification of the capture efficiency and exhaust flow rate for each prototype. During indoor evaluations, individual prototypes' capture efficiencies averaged from 7 percent to 100 percent. Outdoor evaluations resulted in average capture efficiencies ranging from 81 percent down to 1 percent as wind gusts disrupted the ability of the controls to capture the SF6. The tracer gas testing protocol successfully revealed deficiencies in prototype designs which otherwise may have gone undetected. It also showed that the combination of a good enclosure and higher exhaust ventilation rate provided the highest capture efficiency. Some manufacturers used the stationary evaluation results to compare performances among multiple hood designs. All the manufacturers identified areas where their prototype designs were susceptible to cross-draft interferences. These stationary performance evaluations proved to be a valuable method to identify strengths and weaknesses in individual designs and subsequently optimize those designs prior to expensive analytical field studies. [Description provided by NIOSH]
• Subjects:
  Construction Industry Engineering Hydrocarbons Occupational Health Safety
• Keywords:
  Asphalt Cements Asphalt Industry Asphalt Paving Asphalt Paving Equipment Author Keywords: Asphalt Fume Control Technology Engineering Controls Road Construction Road Surfacing Smoke Control Smoke Inhalation Sulfur Hexafluoride Tracer Gas Ventilation Testing

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• ISSN:
  1047-322X
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  Ohio ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DPSE - Division of Physical Sciences and Engineering
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  14
• Issue:
  8
• NIOSHTIC Number:
  nn:20025304
• Citation:
  Appl Occup Environ Hyg 1999 Aug; 14(8):565-573
• Federal Fiscal Year:
  1999
• Peer Reviewed:
  True
• Source Full Name:
  Applied Occupational and Environmental Hygiene
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:373e4cdff602590ef49a37806308b7c0a2ec3f654d8740dcb47a618104f0d9f5baadca9058401b28cf182db48d6d759d06638660d0eb863cd56807dc1e115ac6
• Download URL:
  https://stacks.cdc.gov/view/cdc/196741/cdc_196741_DS1.pdf
• File Type:
  [PDF - 1.68 MB ]