title: Production of aggregate from non-metallic automotive shredder residues.
abstract: In this paper, the results of an experimentation on the production of granules suitable to be used as aggregates in cementitious or asphalt mixes are presented and discussed. The granules were obtained by granulating the non-metallic fraction of automotive shredder residues. In a preliminary separation step the fluff fraction containing mainly inert and non-metallic materials was sieved and analyzed for the metal content. In the following granulation step, the sieved fraction was mixed with binding materials, fly ash and a densifier agent, to produce granules of 5-30 mm of diameter and up to 1400 kg/m3 of specific weight. The granulation was carried out at room temperature in a rotating tank. Concrete samples prepared using as aggregates the produced granules showed a specific weight up to 1800 kg/m3 and a compressive strength up to about 55% of reference samples prepared using a calcareous aggregate, depending on the fluff content of the mixes, and on the nature of the binder and of the other components used.
authors.affiliation: Dipartimento di Ingegneria Chimica, dei Materiali, delle Materie Prime, Metallurgia, Università di Roma La Sapienza, Via Eudossiana 18, 00184 Roma, Italy.
authors.forename: Vito Alunno
authors.initials: VA
authors.lastname: Rossetti
authors.forename: Luca
authors.initials: L
authors.lastname: Di Palma
authors.forename: Franco
authors.initials: F
authors.lastname: Medici
mesh_terms: D001336:Automobiles; D003247:Conservation of Natural Resources; D008670:Metals
chemical_list: D008670:Metals