Quantifying Greenhouse Gas Generation for Roadway Maintenance, Rehabilitation and Reconstruction Treatments

Greenhouse gas (GHG) emission levels in Canada peaked in 2007 at 751 Mt CO2e (carbon dioxide equivalents) and currently these levels are decreasing. Through the Copenhagen Accord, Canada has committed to a 17 percent reduction of 2005 GHG emission levels by 2020 to 607 Mt. To reduce GHG emissions generated in roadway construction, it is important to quantify the amount of GHGs produced for various treatments and to identify which aspects of construction contribute the greatest. This paper describes the development of a probabilistic model that quantifies the amount of GHGs generated through maintenance, rehabilitation, and reconstruction treatments for flexible pavement structures and includes the GHG emissions generated from the transportation, production and placement of materials. The maintenance treatments reviewed include: fog seal, slurry seal, micro surfacing, chip seal and ultra thin overlay. The rehabilitation and reconstruction treatments reviewed include: cold in-place recycling, mill and fill, full depth reclamation, and use of offsite recycled and virgin materials for reconstruction. To quantify the GHGs generated for each of these treatments a case study of a typical lane-km (3,700 m2) is used. A case study quantifying the amount of GHG emissions generated through 33,888 m2 of roadway reconstruction in the neighbourhood of King Edward Park is presented. Through the use of full depth reclamation for reconstruction it is estimated that approximately 52 percent or 700 t CO2e less was generated compared to a traditional remove and replace with virgin materials. For the covering abstract of this conference see ITRD record number 201310RT334E.

Language

  • English

Media Info

  • Pagination: 14 p.
  • Monograph Title: 2013 Conference and Exhibition of the Transportation Association of Canada - Transportation: Better - Faster - Safer

Subject/Index Terms

Filing Info

  • Accession Number: 01518044
  • Record Type: Publication
  • Source Agency: Transportation Association of Canada (TAC)
  • Files: ITRD, TAC
  • Created Date: Mar 11 2014 10:59AM