RAP Paving - British Columbia Perspective

The British Columbia Ministry of Transportation and Infrastructure (MoTI) has been using 100 percent Reclaimed Asphalt Pavement (RAP) to pave numerous side roads in its network for more than 15 years with mixed results. The RAP is typically transported off site and recycled by adding a rejuvenator and processing the material through a pugmill. The cold recycled mix is then transported to site and placed using conventional paving equipment as a wearing surface – a surfacing layer of Hot Mix Asphalt (HMA) is not placed. Although the BC MoTI has been using this procedure for over a decade, no study to evaluate the addition rate of the rejuvenator, mix design, recycling process, or testing to determine the quality of the recycled mix was ever completed. The crushed granular equivalency or structural layer coefficient of the recycled mix was also never developed. This paper will document the findings of a laboratory program undertaken to evaluate the optimum addition rate of the rejuvenator, curing period prior to the placement of the recycled mix, and compaction criteria, as well as the structural layer coefficient and crushed granular equivalency of the recycled RAP. A case history of several previously completed projects using cold recycled RAP pavement are also presented.

• Corporate Authors:

  Canadian Technical Asphalt Association

  ,   United States 
• Authors:
  • Sharma, V
  • JOHNSTON, L
  • Hogg, B
  • Schmidt, A
  • Van Reekum, A
• Conference:
  • Proceedings of the Sixth-Second Annual Conference of the Canadian Technical Asphalt Association (CTAA): Halifax, Nova Scotia
• Publication Date: 2017

Language

• English

Media Info

• Media Type: Print
• Pagination: pp. 129-143.
• Monograph Title: Proceedings of the Sixth-Second Annual Conference of the Canadian Technical Asphalt Association (CTAA): Halifax, Nova Scotia

Subject/Index Terms

• TRT Terms: Admixtures; Aggregates; Case studies; Cold coated materials; Compactibility; Concrete curing; Conferences; Mix design; Recycled materials; Recycling
• Geographic Terms: Canada
• ITRD Terms: 4736: Admixture; 4577: Aggregate; 8018: Canada; 8531: Case study; 4988: Cold coated material; 5904: Compaction (state of); 8525: Conference; 4702: Curing (concrete); 4714: Mix design; 4966: Reclaimed asphalt; 4573: Recycling (mater); 5291: Rejuvenation
• Subject Areas: Geotechnology; I31: Bituminous Binders and Materials; I52: Construction of Pavements and Surfacings;

Filing Info

• Accession Number: 01668504
• Record Type: Publication
• Source Agency: Transportation Association of Canada (TAC)
• Files: ITRD, TAC
• Created Date: May 3 2018 3:18PM