Wet granulation for inertization of fly ashes, fluff, and marine sediments

Some experimental results on the inertization of fly ashes from coal thermal plants (CFA), the non-metallic fraction of automotive shredder residues (ASR or “fluff”) and dredged marine sediments (MS) are reported. A series of mixtures, containing hydrated lime or cement as binder, with the aim to obtain pastes with a satisfactory compression strength and to optimize the percentage of granulated wastes, are formulated utilizing the wet granulation technique at room temperature. Inertization with hydrated lime is fit for treatment of fly ashes, while cement is more suitable for stabilization of the other two residues, in order to obtain light weight aggregates for concrete production.