Potential Carbon Footprint Reduction for Reclaimed Asphalt Pavement Innovations: LCA Methodology, Best Available Technology, and Near-Future Reduction Potential

Diana Eliza Godoi Bizarro, Zoran Steinmann, Isabel Nieuwenhuijse, Elisabeth Keijzer and Mara Hauck
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Diana Eliza Godoi Bizarro: Climate Air and Sustainability Department, The Netherlands Organisation for Applied Scientific Research, 3584 CB Utrecht, The Netherlands
Zoran Steinmann: Environmental Systems Analysis Group, Wageningen University, 6708 PB Wageningen, The Netherlands
Isabel Nieuwenhuijse: Energy Sector, CE Delft, 2611 HH Delft, The Netherlands
Elisabeth Keijzer: Climate Air and Sustainability Department, The Netherlands Organisation for Applied Scientific Research, 3584 CB Utrecht, The Netherlands
Mara Hauck: Climate Air and Sustainability Department, The Netherlands Organisation for Applied Scientific Research, 3584 CB Utrecht, The Netherlands

Sustainability, 2021, vol. 13, issue 3, 1-20

Abstract: The carbon footprints of asphalt mixtures with increasing reclaimed asphalt pavement (RAP) content were estimated using a life-cycle assessment methodology. Three asphalt mixtures with different applications and technical requirements, namely porous asphalt (PA), stone mastic asphalt (SMA), and asphalt concrete (AC), were included. The technology leaps needed to achieve asphalt mixtures containing up to 93% RAP were modelled. Mixtures containing up to 57% RAP were hot-mix asphalts (175 °C), while mixtures containing more RAP were produced at 135 °C and 105 °C. The energy requirements and their respective carbon footprints were calculated based on the heat capacity of the aggregates, RAP, and other bituminous materials. Furthermore, the effects of changing the country’s electricity mix were also evaluated. A potential carbon footprint reduction of between 55% and 64% was found for one tonne of asphalt containing 93% RAP and produced at 105 °C compared to the 0% RAP mixture produced at 175 °C. Considering the uncertainty of this technology at its early stage of development, the reduction could be as low as 45% or as high as 79%. Changing the electricity mix to one that is likely to be implemented until 2030 in the Netherlands further reduces the footprint by 10%.

Keywords: circular asphalt; asphalt recycling; asphalt life-cycle assessment; WMA; RAP; asphalt innovation; TRL; carbon footprint reduction (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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