00769534

Component

https://doi.org/10.3141/1661-09

http://scholar.google.com...born&publication_year=1999

Studies conducted by the National Institute of Occupational Safety and Health (NIOSH) evaluated the carcinogenicity of fumes collected from a catalytically prepared roofing asphalt at 232 deg C and 316 deg C using a laboratory generator. The fume condensate from these studies was found to cause a carcinogenic response. However, the uniqueness of the roofing asphalt and the laboratory-generation method makes it difficult to assess the meaning of this study in the context of paving asphalt. Fumes from paving asphalt operations were compared compositionally with the fumes generated and used in the NIOSH animal studies. In addition, the impact of temperature on asphalt fume composition was examined. The results showed that fume composition is greatly affected by the conditions under which the fume is generated, the design of the laboratory fume generator having the most significant effect on the type of fume produced. Fumes collected at field paving sites bear little resemblance chemically to the roofing fume used in the animal study. Most important, the compounds most likely responsible for the carcinogenicity in the animal studies were not present in fumes found in the field paving sites studied.

This paper appears in Transportation Research Record No. 1661, Hot-Mix Asphalt Binders.

English

p. 54-59

1999

Transportation Research Record

0309070589

Figures (4) ; References (10) ; Tables (4)

Asphalt; Carcinogens; Chemical composition; Field tests; Fumes; Health hazards; Laboratory animals; Laboratory tests; Occupational safety; Temperature

Highways; Materials; Safety and Human Factors; I31: Bituminous Binders and Materials

TRIS, TRB, ATRI

Sep 29 1999 12:00AM

• BLENDING CHARTS BASED ON PERFORMANCE-GRADED ASPHALT BINDER SPECIFICATION
• CHEMICAL AND RHEOLOGICAL CHARACTERISTICS OF STYRENE-BUTADIENE-STYRENE POLYMER-MODIFIED BITUMENS
• COLLABORATIVE EVALUATIONS OF LOW-TEMPERATURE SUPERPAVE PERFORMANCE-GRADED ASPHALT BINDERS
• COMPARISON OF ASPHALT EXTRACTION PROCEDURES: IMPLICATIONS OF HIDDEN ENVIRONMENTAL AND LIABILITY COSTS
• DETECTION OF COAL TAR MATERIALS IN ASPHALT PAVEMENTS BY USING CHEMICAL AND BIOLOGICAL METHODS
• EFFECT OF HYDRATED LIME ON RHEOLOGY, FRACTURE, AND AGING OF BITUMEN (WITH DISCUSSION AND CLOSURE)
• EFFECT OF OXIDATION PRESSURE ON ASPHALT HARDENING SUSCEPTIBILITY
• FIELD PERFORMANCE OF MODIFIED ASPHALT BINDERS EVALUATED WITH SUPERPAVE TEST METHODS: I-80 TEST PROJECT
• LABORATORY GENERATION AND EVALUATION OF PAVING ASPHALT FUMES
• LOW-TEMPERATURE EVALUATION OF KENTUCKY PERFORMANCE-GRADED 70-22 ASPHALT BINDERS
• LOW-TEMPERATURE PHYSICAL HARDENING OF HOT-MIX ASPHALT
• MECHANISM OF INTERACTION OF ASPHALT CEMENT WITH CRUMB RUBBER MODIFIER
• PERFORMANCE-GRADED HIGH-TEMPERATURE SELECTION CRITERION: CAN WE DO IT BETTER?
• PHYSICAL HARDENING OF ASPHALT BINDERS RELATIVE TO THEIR GLASS TRANSITION TEMPERATURES
• RHEOLOGICAL CHARACTERISTICS OF SELECTED POLYMER-MODIFIED ASPHALTS THROUGH THEIR DYNAMIC COMPLIANCES
• STUDY OF STERIC HARDENING EFFECT OF THIN ASPHALT FILMS IN PRESENCE OF AGGREGATE SURFACE