Effects of Extreme Weather Conditions on Recycled Asphalt Mixtures

Every spring, the pavement surface displays multiple distresses, and the ability of the materials to withstand the extreme winter conditions is questioned. The durability of asphalt mixtures could be affected by cyclic freezing and thawing and winter maintenance operations. This paper studies the differential effect of extreme weather conditions on recycled asphalt mixtures, compared to conventional mixtures. Plant-produced recycled hot mixes were collected from four providers in New Brunswick, and the corresponding conventional mixtures produced with the same raw materials were also supplied. Laboratory specimens were subjected to different types of conditioning including warm-water soaking, single freeze-thaw cycle, multiple freeze-thaw cycles using a freeze-thaw cabinet, deicer salt brine saturation, and salt spreading. Two tests were conducted; determination of the indirect tensile strength and abrasion resistance by the rotating-cutter method. It was found that multiple freeze-thaw cycles resulted in a high reduction in the tensile strength of the asphalt mixtures, however there was no significant difference between the conventional and recycled mixtures. Saturation of the samples in deicer salt brine did not result in a significant effect on the tensile strength. Finally, abrasion resistance tests showed that conventional asphalt mixtures were more susceptible to abrasion compared to the recycled mixtures.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780986914195
• Corporate Authors:

  Canadian Technical Asphalt Association

  174-2417 Main Street
  West Kelowna, British Columbia  Canada  V4T 2H8
• Authors:
  • Moeini, Shahab
  • Sanchez, Xiomara
  • 0000-0003-2947-3226
  • Wilson, Bruce
• Conference:
  • Proceedings of the Sixty-fourth Annual Conference of the Canadian Technical Asphalt Association (CTAA), Montreal, Quebec, November 2019
  • Location: Montreal Quebec, Canada
  • Date: 2019-11-24 to 2019-11-28
• Publication Date: 2019-11-30

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 125-140
• Monograph Title: Proceedings of the Sixty-fourth Annual Conference of the Canadian Technical Asphalt Association (CTAA), Montreal, Quebec, November 2019

Subject/Index Terms

• ITRD Terms: 4967: Bituminous mixture; 8018: Canada; 8525: Conference; 7326: Deicing salt; 2577: Freezing thawing cycle; 5278: Frost damage; 4966: Reclaimed asphalt
• Subject Areas: I26: Water Run-off - Freeze-thaw;

Filing Info

• Accession Number: 01906472
• Record Type: Publication
• Source Agency: Transportation Association of Canada (TAC)
• ISBN: 9780986914195
• Files: ITRD, TAC
• Created Date: Jan 30 2024 2:00PM