This report is an evaluation of the production of asphaltic concrete by plants which employed the drum mixing method. The study covered relevant highway construction in Ontario from 1975 to 1977. The production of mixes is traced through the entire system from the stockpile to the road with respect to quality and adherence to specifications. The results of this study have shown that the asphalt cement coating of the aggregate has been good and no stripping of this coating has occurred in mixes placed two years ago. The minimum placing temperature was found to be 240 deg F and the very small moisture content has not had any beneficial or detrimental effect on the compaction of the mix on the road. The variation of the asphalt cement contents and the retained mesh 4 material are slightly higher in mixes produced by the drum mixer when compared to conventional type plants. Drum mix plants have lower initial cost, eliminate high maintenance components, are highly portable, employ lower mixing temperatures and have high production rates. (TRRL)

  • Corporate Authors:

    Ontario Ministry of Transportation & Communic, Can

    1201 Wilson Avenue
    Downsview, Ontario M3M 1J8,   Canada 
  • Authors:
    • Loughnan, J
  • Publication Date: 1978-1

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: 105 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00309873
  • Record Type: Publication
  • Source Agency: Transportation Association of Canada
  • Report/Paper Numbers: Rpt. EM 18 Monograph
  • Files: ITRD, TRIS
  • Created Date: Jun 26 1980 12:00AM