Sintering is shown to be a very convenient alternative way for recycling silicate residues. Glass sintering can be carried out at temperatures in the range of 600-900 deg C to fabricate for example panels, floor and wall tiles, and other building and specialised materials, leading to considerable savings of energy costs. Moreover, by powder technology and sintering technique a variety of glass matrix composite and glass-ceramic materials with optimised microstructures and improved mechanical and physical properties can be fabricated, expanding in this way the application potential of waste-containing products. Two examples are presented, based on the utilisation of different silicate residues: i) glass cullet and coal power station fly ashes and ii) fly ash from municipal waste incinerators.
