A fine natural aggregate obtained through recovery treatment of a steelworks slag has been study to assess its use in the asphalt concrete production. Routinely this aggregate is only used, mixed with a (0,25 – 1 mm) sand to produce asphalt. The process was developed in laboratory scale aiming to transform a waste product into raw material, following the principles of circular economy. The aggregate produced from this recovery has been studied, from a physical-dimensional point of view, to assess its compatibility with the production of asphalt concrete. We compared the results of the characterization with a natural aggregate from quarry. Specimens of asphalt concrete have been produced using the two aggregates to evaluate their mechanical characteristics. In particular, we examined the resistance to permanent deformations, associated with degradation and rutting of pavements. The tests were carried out in the laboratory through a Marshall test as well as dynamic creep test. The differences in the volumetric properties of the two asphalt products were also evaluated.
