TY - GEN
T1 - A sustainability evaluation of hot-in-place asphalt recycling technique
AU - Ozer, Hasan
AU - Singhvi, Punit
AU - Yang, Rebekah
AU - Al-Qadi, Imad L.
AU - Abuawad, Ibrahim
N1 - Publisher Copyright:
© Copyright 2016 by Mairepav8 2016 Organizers.
PY - 2016
Y1 - 2016
N2 - 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.
AB - 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.
KW - Energy consumption
KW - Field performance
KW - Greenhouse gases
KW - Hot-in-place recycling
KW - Laboratory performance
UR - http://www.scopus.com/inward/record.url?scp=85003422071&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85003422071&partnerID=8YFLogxK
U2 - 10.3850/978-981-11-0449-7-131-cd
DO - 10.3850/978-981-11-0449-7-131-cd
M3 - Conference contribution
AN - SCOPUS:85003422071
T3 - 8th International Conference on Maintenance and Rehabilitation of Pavements, MAIREPAV 2016
SP - 736
EP - 745
BT - 8th International Conference on Maintenance and Rehabilitation of Pavements, MAIREPAV 2016
PB - Research Publishing Services
T2 - 8th International Conference on Maintenance and Rehabilitation of Pavements, MAIREPAV 2016
Y2 - 27 July 2016 through 29 July 2016
ER -