Recycling and valorisation of waste materials coming from municipal and industrial processes has become an urgent problem. Moreover, national regulations are reinforcing environmental protection measures, thus rendering the development of new recycling technologies necessary and convenient. By considering that both the ceramic industry is a high consumer of natural raw materials and these materials develop crystalline phases and glassy matrices capable to block the wastes it is easy to understand that the ceramic sector represents an important reference point for the recycling of wastes. The experimental work has been carried out by mixing incinerator bottom ash and steel ash in both a ceramic paste for red single firing and in a body for facing bricks. The samples characterisation has been conducted by means of linear shrinkage, water absorption, density, porosity, crystalline phases identification, plasticity, loss in weight and surface defects. From this feasibility study, can be evinced that both the processes allow the introduction of wastes in terms of chemical, physical, mineralogical and esthetical compatibility, in particular for percentage up to 5wt% because higher percentage causes major modifications in the standard bodies.
Inorganic wastes as new resource of materials / Barbieri, L.; Lancellotti, A.; Corradi, A.; Andreola, F.; Pozzi, P.. - (2003), pp. 79-86. (Intervento presentato al convegno Recycling and Reuse of Waste Materials, Proceedings of the International Symposium tenutosi a Dundee, gbr nel 2003).