Abstract
Porous asphalt mixtures play a remarkable role in road pavement thanks to their advantages to drain water and reduce noise. To meet the always-increasing environmental needs, new porous asphalt mixtures are being developed with the addition of recycled materials. The present paper investigates the physical, mechanical, and functional characteristics of two porous mixtures made with electric arc furnace (EAF) steel slag and reclaimed asphalt pavement (RAP). The properties of the two recycled mixtures are compared with conventional porous asphalt produced with natural aggregates. An LCA analysis is performed with a cradle-to-gate approach to evaluate and compare the possible environmental benefits connected to the production of the experimental porous asphalt. The results coming from the laboratory investigation demonstrated higher mechanical and functional performances related to the use of EAF steel slag and RAP aggregates. The environmental assessment established a reduction of up to 25% of potential impact for the mixture produced with both artificial and recycled aggregates.
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