Utilisation of fly ash and waste glass in production of glass-ceramics composites

Glass-ceramics composites were produced utilising fly ash from coal power stations and waste glass from TV monitors, windows and flasks. The addition of 50% flask glass in the fly ash, increases the bending strength and E-modulus from 9 ± 3 to 77 ±3 MPa and 6 ± 2 to 29 ± 3 GPa, respectively. Using polyurethane foam as a creator of porous structure, the obtained porous composites, consisted of fly ash-glass, had the porosity of 70 ± 5 %. E-modulus and bending strength of the porous systems, obtained by polyurethane foam, were 3.5± 1.2 GPa and 6 ± 2 MPa, respectively. The porous materials had a durability (mass loss) of 0.03 - 0.05 % in 0.1 M HCl, which characteristic is identical with the durability of the dense composites. (Author)