Transportation of high quality, skid resistant aggregates from Marmora to Eastern Ontario is expensive and will become even more costly with increased oil prices. There is a need in Eastern Ontario for locally available skid resistant aggregates. Fieldwork in the Ottawa area showed several locations where sandy dolostone, a potential skid resistant aggregate, is available. Laboratory testing confirmed the excellent skid resistant properties of this rock. Diamond drilling showed the location and extend of suitable deposits of this rock. Several detailed recommendations are made about the location, evaluation and use of these rocks. It will be necessary to establish an experimental test section before this rock can be approved for use in open graded friction course mixes. The variation in resistance to asphalt stripping with time, of an experimental aggregate stockpile, should be monitored to see if an antistripping agent is required. Further geologic work in other parts of Eastern Ontario is necessary to find and encourage development of other sources of this rock close to the areas of use. The Ontario Government should establish strategic reserves of this valuable resource for use by future generations. Use of these rocks in place of Trap rock will reduce the cost of H.L.1 asphaltic concrete by about $5 a ton in the Ottawa area giving annual savings of about $50,000. Based on laboratory tests, sandy dolostone has the best skid resistant properties of any aggregate currently available in Southern Ontario. Its use will provide better pavement skid resistance than that obtained using any other rock, even the traditional "Trap Rock". This will ultimately lead to an increase in safety on Ontario highways. (Author)

  • Corporate Authors:

    Ontario Ministry of Transportation & Communic, Can

    1201 Wilson Avenue
    Downsview, Ontario M3M 1J8,   Canada 
  • Authors:
    • Rogers, C A
  • Publication Date: 1980-5

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 72 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00335499
  • Record Type: Publication
  • Report/Paper Numbers: Rpt. EM-36
  • Files: TRIS
  • Created Date: Sep 16 1981 12:00AM