High strength lightweight glass-ceramics were fabricated by using waste flyash as main raw material. The effects of the utilization rate of the fly ash, nucleation agents, and sintering temperature on the properties of the glass-ceramics were studied. The flyash utilization rate as high as 70% was achieved in realizing an optimal glass-ceramics property at a sintering temperature of 1300 °C. When nucleation agents of Fe2O3 (6.5 wt.%) and TiO2 (3 wt.%) are used, the glass-ceramics sintered at 1300 °C showed maximal property with a minimal water absorption (~0) and a maximal flexural strength (146.7 MPa) but the highest density (2.72 g/cm3). This high strength glass-ceramics may be a promising building material and proppant material for hydraulic fracturing production of petroleum. This work discussed the useful patents in the field of application and invention of glass-ceramics.
Keywords: Flyash, integrated utilization, glass-ceramics, high strength, building material, proppant, optimization.