Utilising recycled material stabilised with bitumen to rehabilitate a major highway within stringent time constraints

The Ayrton Senna Highway feeding into São Paulo City from the north-east ranks as one of the most heavily-trafficked links in Brazil’s road network. This highway was originally constructed in the late 1970s and now carries more than 200 000 vehicles per day (± 15% heavy vehicles). A concession agreement with the State Highway Authority was signed in 2009 transferring maintenance responsibilities to EcoRodovias, a consortium of large construction companies. EcoRodovias soon learned that meeting their concession obligations required continuous interventions, mostly carried out during a 6-hour working window at night. Operations that milled and replaced 100mm of asphalt often had to be repeated within six months as a consequence of problems deeper in the pavement structure. Clearly, a more appropriate solution was required, one that was affordable and could be completed within 6 hours. This paper describes the methodology followed to find such a solution. Technology developed in South Africa was adopted to recycle material from the existing pavement, stabilised with bitumen to provide a balanced pavement that could withstand early trafficking. By the end of 2014, more than 100km of truck lanes had been rehabilitated using this technology and ongoing monitoring of sections treated in 2011 confirmed performance predictions.

• Authors:
  • Collings, D
  • Jenkins, K
  • Souza, E
• Conference:
  • Conference on Asphalt Pavements for Southern Africa (CAPSA15), 11th, 2015, Sun City, South Africa
• Publication Date: 2015-8

Language

• English

Media Info

• Pagination: 12p
• Monograph Title: 11th Conference on Asphalt Pavements for Southern Africa: CAPSA15, 16-19 August 2015, Sun City, South Africa

Subject/Index Terms

• TRT Terms: Bituminous pavements; Case studies; Heavy vehicles; Highway maintenance; Recycled materials; Time
• Uncontrolled Terms: Pavement technology
• Geographic Terms: Sao Paulo (Brazil)
• ATRI Terms: Bituminous pavement; Case study; Heavy vehicle; Recycled materials; Road maintenance; Time
• Subject Areas: Highways; Maintenance and Preservation;

Filing Info

• Accession Number: 01597074
• Record Type: Publication
• Source Agency: ARRB
• Files: ATRI
• Created Date: Apr 22 2016 11:12AM