Porous asphalt (PA) mixtures are more environmentally friendly but have lower durability
than dense-graded mixtures. Additives can be incorporated into PA mixtures to enhance
their mechanical strength; however, they may compromise the hydraulic characteristics, increase
the total cost of pavement, and negatively affect the environment. In this paper, PA mixtures were
produced with 5 different types of additives including 4 fibers and 1 filler. Their performances were
compared with the reference mixtures containing virgin bitumen and polymer-modified bitumen.
The performance of all mixes was assessed using: mechanical, hydraulic, economic, and environmental
indicators. Then, the Delphi method was applied to compute the relative weights for the
parameters in multi-criteria decision-making methods. Evaluation based on distance from average
solution (EDAS), technique for order of the preference by similarity to ideal solution (TOPSIS), and
weighted aggregated sum product assessment (WASPAS) were employed to rank the additives.
According to the results obtained, aramid pulp displayed comparable and, for some parameters
such as abrasion resistance, even better performance than polymer-modified bitumen, whereas
cellulose fiber demonstrated the best performance regarding sustainability, due to economic and
environmental benefits.This work and the APC are funded by SAFERUP! Project, from the European Union’s Horizon 2020 research and innovation program under, the Marie Skłodowska-Curie grant agreement No. 765057
