Industry Challenges Associated with Utilizing Asphalt Shingles in Asphalt Mixtures - An Agency Perspective

Most agencies have mandates to explore opportunities to "reuse" materials and provide economic, environmental and social benefits. The asphalt paving industry has been a leader in this regard, recognizing for example, the reuse of nearly 100 percent of the asphalt pavement reclaimed. Over the past decade processed asphalt shingles from manufacturer's waste has been added to the suite of recycled materials used in asphalt mixtures. More recently the use of post-consumer Recycled Asphalt Shingles (RAS) has been introduced to the industry. Although the environmental benefits are significant, challenges are associated with the incorporation of RAS. Intuitively, most asphalt technology practitioners would likely suggest that only a portion of the asphalt binder in RAS contributes to the total "available" asphalt binder in the mix. This is due to the relatively "hard" consistency of the asphalt binder in RAS. This uncertainty with respect to RAS binder contribution raises several questions. But for this practice to not to be detrimental to pavement performance, the need exists to define and implement sound quality management practices and asphalt technology principals to assist practitioners. This paper provides a synopsis of the implementation of RAS and related research, and information regarding the City of Calgary experience to date. (A) For the covering abstract of this conference see ITRD record number 201402RT334E.

• Corporate Authors:

  Canadian Technical Asphalt Association

  ,   United States 
• Authors:
  • Johnston, A
  • MOHAMMAD, K
  • CHYE-CIES, J
• Conference:
  • PROCEEDINGS OF THE FIFTY-EIGHTH ANNUAL CONFERENCE OF THE CANADIAN TECHNICAL ASPHALT ASSOCIATION (CTAA): ST. JOHN'S, NEWFOUNDLAND AND LABRADOR, NOVEMBER 2013
• Publication Date: 2013

Language

• English

Media Info

• Pagination: p. 429-41
• Monograph Title: Proceedings of the Fifty-Eighth Annual Conference of the Canadian Technical Asphalt Associatio (CTAA): St. John's, Newfoundland and Labrador, November 2013

Subject/Index Terms

• TRT Terms: Admixtures; Bituminous materials; Bituminous mixtures; Case studies; Conferences; Evaluation; Mix design; Quality assurance; Recycling; Sustainable development; Vehicle performance
• Uncontrolled Terms: In service behavior
• Geographic Terms: Canada
• ITRD Terms: 4736: Admixture; 4955: Bituminous materials; 4967: Bituminous mixture; 8018: Canada; 8531: Case study; 8525: Conference; 9020: Evaluation (assessment); 9121: In service behaviour; 4714: Mix design; 9123: Quality assurance; 4573: Recycling (mater); 2427: Sustainability
• Subject Areas: Data and Information Technology; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01518102
• Record Type: Publication
• Source Agency: Transportation Association of Canada (TAC)
• Files: ITRD, TAC
• Created Date: Mar 11 2014 11:01AM