Construction and Demolition Waste (CDW) was blended with various ceramic residues (bricks, roof tiles, and ceramic powder) and melted at 1200 °C for 8 h to evaluate their potential for producing industrially viable glasses within the CaO-Al2O3-SiO2 (CAS) system. High-temperature treatments yielded fully amorphous products for mixtures containing 70 wt.% ceramic waste, highlighting the need for additive inputs to CDW to achieve complete vitrification. Raman Spectroscopy was employed to assess the structural polymerization of the glasses; deconvolution of the silicate stretching region revealed a greater proportion of highly polymerized Q3 and Q4 species in ceramic powder-rich samples. Differential Scanning Calorimetry (DSC) measurements provided viscosity estimates near the glass transition, which positively correlated with the degree of polymerization inferred from Raman analysis. Among all tested compositions, the C70 sample (containing 70 wt.% ceramic powder) exhibited the highest viscosity and degree of polymerization, consistent with its higher silica content and amorphous precursor phase. Notable shifts in glass transition interval and structural polymerization emphasize the influence of waste type on glass properties. These findings support the feasibility of recycling CDW-ceramic waste blends with specific thermal and structural properties for targeted industrial glass applications such as fining, molding, and annealing.
Characterization of mixed- waste glasses in the CAS system: insights from differential scanning calorimetry and Raman spectroscopy / Stabile, P.; Fornasini, L.; Pasetti, L.; Bersani, D.; Dominijanni, S.; Di Genova, D.; Romano, C.; Paris, E.. - In: THE EUROPEAN PHYSICAL JOURNAL PLUS. - ISSN 2190-5444. - 140:8(2025). [10.1140/epjp/s13360-025-06677-3]
Characterization of mixed- waste glasses in the CAS system: insights from differential scanning calorimetry and Raman spectroscopy
Fornasini L.;Pasetti L.;Bersani D.;Paris E.
2025-01-01
Abstract
Construction and Demolition Waste (CDW) was blended with various ceramic residues (bricks, roof tiles, and ceramic powder) and melted at 1200 °C for 8 h to evaluate their potential for producing industrially viable glasses within the CaO-Al2O3-SiO2 (CAS) system. High-temperature treatments yielded fully amorphous products for mixtures containing 70 wt.% ceramic waste, highlighting the need for additive inputs to CDW to achieve complete vitrification. Raman Spectroscopy was employed to assess the structural polymerization of the glasses; deconvolution of the silicate stretching region revealed a greater proportion of highly polymerized Q3 and Q4 species in ceramic powder-rich samples. Differential Scanning Calorimetry (DSC) measurements provided viscosity estimates near the glass transition, which positively correlated with the degree of polymerization inferred from Raman analysis. Among all tested compositions, the C70 sample (containing 70 wt.% ceramic powder) exhibited the highest viscosity and degree of polymerization, consistent with its higher silica content and amorphous precursor phase. Notable shifts in glass transition interval and structural polymerization emphasize the influence of waste type on glass properties. These findings support the feasibility of recycling CDW-ceramic waste blends with specific thermal and structural properties for targeted industrial glass applications such as fining, molding, and annealing.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
