Influence of the Mineral Nature and the Temperature of the Aggregate in the Water Resistance of Foam Bitumen Stabilized Mixes

In-place foamed bitumen stabilization is experiencing a global growth worldwide. This pavement rehabilitation process was introduced in Canada in the early nineties. It is currently estimated that between two and three million square metres of pavement are rehabilitated using this method every year throughout Canada. Foamed stabilized mixtures have properties that differ significantly from those of standard hot bituminous mixtures. Contrary to hot bituminous mixes, the coating of the aggregate is selective and the voids in the mixture are high. Consequently, properties of foam-stabilized mixtures are closely associated with the aggregate skeleton of the mixture. In general, foam mixes are not as thermally sensitive as hot mix and their resistance to rutting and thermal cracking is excellent. However, the cohesion of foam mixes is significantly lower than hot mix which reduces their resistance to water damage. This paper focuses on the water resistance of in-place foamed bitumen stabilized mixes that have between 2.5 and 3.0 % added binder. The concepts associated with water resistance in relation to the temperature of the aggregate during mixing and the mineral nature/gradation of the aggregate are outlined. And finally, the paper provides results of testing of mixes produced using various water resistance enhancers.

• Corporate Authors:

  International Society for Asphalt Pavements

  4711 Clark Avenue, Suite G
  White Bear Lake, MN  United States  55110
• Authors:
  • Davidson, J K
  • Croteau, JM
• Conference:
  • 10TH INTERNATIONAL CONFERENCE ON ASPHALT PAVEMENTS - AUGUST 12 TO 17, 2006, QUEBEC CITY, CANADA
• Publication Date: 2006

Language

• English

Media Info

• Media Type: Print
• Pagination: p. vol1,647-55
• Monograph Title: 10th International Conference on Asphalt Pavements - August 12 to 17, 2006, Quebec City, Canada

Subject/Index Terms

• TRT Terms: Bitumen; Comminution; Conferences; Field tests; Foamed materials; Recycling; Repairing; Stripping (Pavements)
• Geographic Terms: Canada
• Subject Areas: Materials; I26: Water Run-off - Freeze-thaw; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01084408
• Record Type: Publication
• Source Agency: Transportation Association of Canada (TAC)
• Files: TAC
• Created Date: Jan 16 2008 8:56AM