Potential use of crumb rubber asphalt for structural layers: initial pavement design analysis

Previous research has indicated that the biggest potential existing market for increased consumption of tyre-derived products in Australia is the road construction sector. In Victoria, crumb rubber is already used in sprayed seals but to a lesser extent in asphalt materials. Tyre Stewardship Australia (TSA) and Sustainability Victoria (SV) commissioned the Australian Road Research Board to conduct a project 'Explore and Evaluate Local Market Development Opportunities for Crumb Rubber Asphalt in Australian Roads'. Part of this project was to evaluate the potential of Crumb Rubber Asphalt for thick asphalt pavement structural layers in conjunction with VicRoads. This paper presents a pavement life-assessment based on a pavement design example where crumb rubber asphalt (CRA) could be used as an alternative base layer material to the binder rich Type SF asphalt, which is currently used by VicRoads for typical heavy duty asphalt pavements. The analysis shows that, the use of CRA for the structural base layer could lead to significant reductions in asphalt thickness and therefore cost savings, with up to an approximately 10% reduction in thickness (35 mm) being possible based on the parameters used in the analysis. The analysis was based on estimated CRA modulus values which need to be confirmed and determined from laboratory measured moduli. As a result, the benefit of CRA would be more precisely quantified in the future.

• Record URL:
  https://arrbknowledge.com
• Authors:
  • Bodin, D
  • Berry, D
  • O'Keefe, L
  • Shanley, K
  • Papacostas, A
• Conference:
  • ARRB International Conference, 28th, 2018, Brisbane, Queensland, Australia
• Publication Date: 2018-5

Language

• English

Media Info

• Pagination: 9p
• Monograph Title: Next generation connectivity: 28th ARRB International Conference, Brisbane, 29 April-2 May, 2018

Subject/Index Terms

• TRT Terms: Base course (Pavements); Bitumen; Bituminous pavements; Construction; Costs; Crumb rubber; Life cycle analysis; Mix design; Pavement layers; Pavements; Rubber; Tires
• Uncontrolled Terms: LIFE-CYCLE; Materials technology (asphalt/bitumen/concrete)
• Geographic Terms: Australia; Victoria
• ATRI Terms: Asphalt; Basecourse; Construction costs; Crumb rubber; Life cycle assessment; Mix design; Pavement layer; Tyre
• ITRD Terms: 2990: Basecourse
• Subject Areas: Construction; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 01678386
• Record Type: Publication
• Source Agency: ARRB
• Files: ITRD, ATRI
• Created Date: Aug 23 2018 2:29PM