Energy and economic considerations have led to the Canadian nationwide interest in pavement recycling. Road pavements and base aggregates are both recyclable. Old pavement is invariably mixed with new (liquid) asphalt cement or a petroleum-based rejuvenator and almost always with new aggregates, if the pavement is to be relaid. It is also occassionally pulverized and used as a base course. In this case, asphalt cement may or may not be added depending on the need for improved stiffness and durability. Pavement recycling also allows for the recompaction and strengthening of subgrades and base layers which may have contributed to the original pavement breakdown. Also, granular base material can sometimes serve as new aggregate for recycled pavements. Three methods of recycling asphalt have been developed: hot mix, cold mix, and surface recycling. Of these, the hot mix process is proving to be the most successful in Canada, and Ontario is the foremost in demonstrating the interest in this process. The biggest advantage with hot mix recycling is in the area of cost reduction. Experiences in Ontario, Quebec, Prince Edward Island, Manitoba and Saskatchewan are briefly described.

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  • Accession Number: 00322669
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Mar 12 1981 12:00AM