Mineralogical and chemical characterization of CDW as function of particle size and thermal treatments for potential recycling

Construction and Demolition Waste (CDW) originating from the rubble produced by 2016 seismic events in Marche Region (Central Italy) has been studied, focusing on its mineralogical chemical characteristics, to investigate recycling potentials as a component for eco-sustainable building material or glass industry. The aim was obtain full characterization of behaviour this at high T order determine most advantageous conditions vitrification, considered an effective process volume reduction well immobilization potentially hazardous elements. Vitrification experiments, carried out with thermal treatments function temperature/duration/particle size aimed amorphization, were under atmospheric conditions, different temperatures (1000-1250°C) durations (2-8 hours). study demonstrated that composition remains homogeneous grainsize <4 mm, thus suggesting no sieving is necessary fine fractions, which are difficult treat. Vitrification, although not achieved CDW sample up 1250°C, due high-Ca low-Si contents, can produce interesting refractory porous/insulating material. However, experiments showed vitrification be easily mixing urban waste CDW, applications Based features products, other significant upgrading alternatives fields highlighted.