Investigation of Asphaltenes-Modified Binders for Application in High Modulus Asphalt Concrete Mixtures

High Modulus Asphalt Concrete (HMAC) is a type of mixture with high mechanical performance including high elastic stiffness, high deformation resistance, and good fatigue resistance. Application of HMAC is limited in cold climatic regions due to its low flexibility and stress relaxation capacity. In this study, the application of binders modified with asphaltenes for high modulus base courses in cold regions was investigated. The Witczak regression model was used to determine the minimum binder performance grade to meet the dynamic modulus requirement of the HMAC mixes. Asphaltenes were used to modify one crude-oil based asphalt binder with Performance Grading (PG) of 70-22, as well as four binders derived from Alberta oil-sands bitumen from different sources. The results of rheological tests indicated that the impact of asphaltenes on the performance of binders was more pronounced at high temperatures rather than low temperatures. The magnitude of the viscosity changes was found to depend directly on the percentage of asphaltenes added. The changes in viscosity were reflected well in the mixing and compaction temperatures. Overall it was concluded that the Alberta oil-sands binders modified with asphaltenes could achieve the performance grade required for high modulus asphalt concrete base course applications in cold regions.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9781990149009
• Corporate Authors:

  Canadian Technical Asphalt Association

  174-2417 Main Street
  West Kelowna, British Columbia  Canada  V4T 2H8
• Authors:
  • Ghasemirad, Amirhossein
  • Bala, Nura
  • Hashemian, Leila
• Conference:
  • Proceedings of the Sixty-Fifth Annual Conference of the Canadian Technical Asphalt Association (CTAA) - Cyberspace, November 2020
  • Date: 2020-11-16 to 2020-11-19
• Publication Date: 2020-11-30

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 419-438
• Monograph Title: Proceedings of the Sixty-Fifth Annual Conference of the Canadian Technical Asphalt Association (CTAA) - Cyberspace, November 2020

Subject/Index Terms

• ITRD Terms: 4991: Asphaltene; 2990: Basecourse; 4948: Binder; 8018: Canada; 2544: Climate; 9116: Cold; 8525: Conference; 4959: High modulus asphalt
• Subject Areas: I22: Design of Pavements, Railways and Guideways; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01910344
• Record Type: Publication
• Source Agency: Transportation Association of Canada (TAC)
• ISBN: 9781990149009
• Files: ITRD, TAC
• Created Date: Feb 28 2024 2:11PM