SOME FACTORS WHICH INFLUENCE THE LABORATORY DETERMINATION OF BITUMEN CONTENT

The use of the reflex extractor, the sieving extractor and the specific gravity method for the determination of bitumen content of asphalt mixes was investigated using two aggregates of different porosities. It was found that the reflux extractor failed to remove all of the bitumen from the more porous aggregate and results thus tended to be low. The use of two solvents and two evaporation methods with the sieving extractor was investigated. Trichloroethylene and infra-red evaporation method were found most satisfactory. The effects of porosity of the aggregate on the effective specific gravity and the resulting determination of bitumen content by the specific gravity and the resulting determination of bitumen content by the specific gravity method were also considered. /TRRL/

• Supplemental Notes:
  • Conference held on July 28 - Aug. 1, 1969.
• Authors:
  • Wilson, L C
  • Burgers, A
• Conference:
  • Asphalt Pavements for So Africa, Conference Proc
• Publication Date: 1969-7

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: 8 p.
• Serial:
  • Volume: 1

Subject/Index Terms

• TRT Terms: Aggregates; Bitumen; Bituminous mixtures; Evaporation; Fluxes; Infrared radiation; Laboratory tests; Measurement; Methodology; Porosity; Sieve analysis; Specific gravity
• Old TRIS Terms: Extractors; Refluxing
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00081744
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Apr 22 1975 12:00AM