Publication
Title
Reviewing the variability in product category rules for asphalt pavements : a quantitative evaluation of methodological framework differences for environmental product declarations
Author
Abstract
The road construction industry is exploring the use of environmental product declarations (EPDs) as a communication tool and their implementation in green public procurement (GPP). Currently, several product category rules (PCRs) specific to asphalt mixtures exist worldwide. Consequently, the objective of this paper is to assess the similarities and differences between these PCRs to avoid comparing EPDs derived from inconsistent methodological frameworks. This research revealed similarities in requirements for data quality, exclusion of inputs and outputs, and allocation procedures. However, it also showed major differences in the use of system boundaries, reference service life (RSL), functional unit (FU), and end-of-life (EOL) modelling. A quantitative evaluation of the variability of the PCRs showed that an RSL in its current form only provides information about the expected performance but does not alter environmental impacts in the final EPDs. Therefore, it is advised to recalculate the results into impacts per year. Furthermore, it was found that applying a cut-off for a rejuvenator and SBS influences the total GWP impact in module A1 by +25% and −30%, respectively. Finally, if an EPD uses a cradle-to-grave or cradle-to-cradle scope, relocating the EOW does not affect the total impact but only triggers a shift of impacts between the EOL and material modules (it can increase the total GWP impact by 25% if the focus is A1-A3). The overall conclusion is that selecting a specific PCR for asphalt mixtures influences the underlying methodological framework and that harmonisation of the PCRs is consequently recommended.
Language
English
Source (journal)
Journal of cleaner production / Masson. - Science citation index
Publication
Science citation index : 2024
ISSN
0959-6526
DOI
10.1016/J.JCLEPRO.2024.140580
Volume/pages
436 (2024) , p. 1-19
Article Reference
140580
ISI
001164582400001
Full text (Publisher's DOI)
Full text (open access)
The author-created version that incorporates referee comments and is the accepted for publication version Available from 03.07.2024
Full text (publisher's version - intranet only)
UAntwerpen
Research group
Project info
Sustainability assessment of roads containing reclaimed asphalt pavement - Decision support based on life cycle assessment & life cycle cost analysis during road design.
Integrating the future in life cycle assessment? An ex-ante case study of emerging innovative slag treatment technologies.
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Record
Identifier
Creation 06.02.2024
Last edited 02.04.2024
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