A sustainability evaluation of hot-in-place asphalt recycling technique

Hasan Ozer, Punit Singhvi, Rebekah Yang, Imad L. Al-Qadi, Ibrahim Abuawad

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The sustainability of hot-in-place asphalt recycling (HIR) was evaluated through performance evaluation and environmental impact assessment. Two HIR repaving projects were chosen, located in Galesburg and Machesney Park, Illinois, USA. The HIR pavement performance constructed at these sites included both field evaluation (i.e., condition rating system, falling weight deflectometer, and smoothness measurements) and laboratory characterization at the mixture and binder level (i.e., dynamic shear rheometer, bending beam rheometer, Illinois Flexibility Index Test, and Hamburg wheel track test). Using the balanced mixture design approach to optimize rutting and cracking resistance of recycle mixes, better performance was predicted for the Galesburg site compared to the Machesney Park site. In addition, an environmental analysis was conducted by comparing the energy and greenhouse gases (GHGs) from the initial construction of HIR and a conventional mill and fill design. The HIR approach was seen to have energy savings of 3.9-17.6% and GHG savings of 1.3-19.2% depending whether a hauling distance of 40 km or 160 km was assumed for on and off-site transportation. To incorporate the effect of pavement performance, a scenario analysis was conducted using annualized energy consumption over the expected treatment life. The minimum required expected life was then determined under which the HIR treatment would offset environmental savings due to poor performance. Thus, the paper provided a holistic sustainability approach considering both environmental impacts and expected performance of HIR.

Original languageEnglish (US)
Title of host publication8th International Conference on Maintenance and Rehabilitation of Pavements, MAIREPAV 2016
PublisherResearch Publishing Services
Pages736-745
Number of pages10
ISBN (Electronic)9789811104497
DOIs
StatePublished - Jan 1 2016
Event8th International Conference on Maintenance and Rehabilitation of Pavements, MAIREPAV 2016 - Singapore, Singapore
Duration: Jul 27 2016Jul 29 2016

Publication series

Name8th International Conference on Maintenance and Rehabilitation of Pavements, MAIREPAV 2016

Other

Other8th International Conference on Maintenance and Rehabilitation of Pavements, MAIREPAV 2016
CountrySingapore
CitySingapore
Period7/27/167/29/16

Keywords

  • Energy consumption
  • Field performance
  • Greenhouse gases
  • Hot-in-place recycling
  • Laboratory performance

ASJC Scopus subject areas

  • Building and Construction
  • Civil and Structural Engineering

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  • Cite this

    Ozer, H., Singhvi, P., Yang, R., Al-Qadi, I. L., & Abuawad, I. (2016). A sustainability evaluation of hot-in-place asphalt recycling technique. In 8th International Conference on Maintenance and Rehabilitation of Pavements, MAIREPAV 2016 (pp. 736-745). (8th International Conference on Maintenance and Rehabilitation of Pavements, MAIREPAV 2016). Research Publishing Services. https://doi.org/10.3850/978-981-11-0449-7-131-cd