*2.3. Characterization of Pellets*

Physical, chemical and mechanical properties of all samples were evaluated at the *Laboratorio di Ingegneria dei Materiali* (DICCA, UNIGE) and compared with standards [17]. The produced commercial pellets (6 kg of RS and 2 kg of RH) were stored for two weeks before characterization. Firstly, the specimens were sub-divided, and a representative sample was selected. The following characteristics were evaluated.
