Five Year Performance of Cold In-Place Recycling with Expanded Asphalt on Highway 7 in Perth, Ontario

Cold In-place Recycling (CIR) is an established rehabilitation method that processes an existing asphalt pavement, sizes it, mixes in additional asphalt cement (traditionally emulsified asphalt), and lays it back down without off-site hauling and processing. A recent development in CIR technology is the use of expanded (foamed) asphalt to bind the mix. This combination of CIR and expanded asphalt technologies is termed Cold In-Place Recycled Expanded Asphalt Mix (CIREAM). The Ministry of Transportation Ontario constructed its first trial section of CIREAM on Highway 7, east of Perth in July 2003. A 5-km trial section of CIREAM was constructed adjacent to 7-km of conventional CIR mix. The performance of these two sections has been monitored over the past 5 years, using a Falling Weight Deflectometer (FWD) and the Ministry's Automatic Road Analyzer (ARAN). Laboratory testing was also carried out to determine resilient modulus and indirect tensile strength of core specimens. In addition, Ultrasonic Pulse Velocity (UPV) testing was completed to assess the overall quality of the mix. The results indicate that CIREAM is a promising alternative to conventional CIR, and provides the same environmental benefits while extending the construction season and reducing the time required before application of the HMA surface. (A)


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Media Info

  • Pagination: p. 453-470

Subject/Index Terms

Filing Info

  • Accession Number: 01149418
  • Record Type: Publication
  • Source Agency: Transportation Association of Canada (TAC)
  • Files: TAC
  • Created Date: Jan 28 2010 7:33AM