Recycling of waste granite and glass powder for the preparation of architectural glass-ceramic

A high-strength glass-ceramic was synthesised utilising industrial solid waste, specifically waste granite and glass powder, as the primary raw materials. This study examined the influence of various factors, including the content of waste granite powder, sintering temperature, additive concentration, and soaking duration, on the physical and mechanical properties of the resulting glass-ceramics. The incorporation of waste granite in glass-ceramics reached a maximum of 92.5 wt%, indicating a promising potential for the large-scale commercial application of granite solid waste. The produced glass-ceramic's flexural strength and fracture toughness were significantly correlated with the quartz content. Notably, the sample processed at a temperature of 1150 °C for 2 h, which contained 39 % quartz with a density of 2.40 g/cm3 demonstrated a minimal water absorption rate of 0.14 %, exhibited the most favorable mechanical properties, achieving a flexural strength, fracture toughness, compressive strength and microhardness of 100.8 MPa, 2.22 MPa m1/2, 926.3 MPa and 5.57 GPa respectively, suggesting its viability as a suitable material for construction.