Inertization of nosocomial wastes into cementitious matrices.

On the basis of previous experimental tests carried out on synthetic wastes, a cementitious mixtures containing condensed silica fume and a superplasticizer has been set up, which greatly reduces the release of immobilized toxic elements in comparison with traditional cementitious matrices. The results obtained using synthetic wastes have been here verified adopting a real waste. In particular, fly ash and bottom ashes, originated from a nosocomial waste incinerator, has been employed. The comparison of results obtained has proved that the immobilization system which employs the addition of silica fume reduces remarkably the possibility of the immobilized toxic release.