Green Glass Foams from Wastes Designed for Thermal Insulation

• Published in: Waste and biomass valorization 2021-03, Vol.12 (3), p.1609-1620
• Main Authors: Stochero, N. P., de Souza Chami, J. O. R., Souza, M. T., de Moraes, E. G., de Oliveira, A. P. Novaes
• Format: Article
• Language: English
• Subjects: Compressive strength; Engineering; Environment; Environmental Engineering/Biotechnology; Flammability; Foams; Green glass; Industrial Pollution Prevention; Mechanical properties; Original Paper; Powder compacts; Renewable and Green Energy; Room temperature; Thermal insulation; Thermal properties; Thermodynamic properties; Waste Management/Waste Technology; Wastes
• ISSN: 1877-2641; 1877-265X
• DOI: 10.1007/s12649-020-01120-3

Glass foams were successfully produced from discarded glass bottles (GB) and pine scales (PS) as pore former agent in contents between 1 and 50 vol%. Samples containing glass and pine scale wastes in powder form were homogenized and uniaxially pressed (20 MPa). The obtained powder compacts were dried (room temperature/24 h and 110 ºC/24 h), fired at 850 ºC/30 min/10 ºC/min and characterized according to their chemical, structural, mechanical, and thermal properties. The results (porosities between 78 and 86% with thermal conductivities between 0.072 and 0.093 W/mK and compressive mechanical strength between 0.2 and 3.4 MPa) indicated that the obtained foams produced from low-cost starting materials have potential for being used in applications where thermal insulation and non-flammability are the main technical requirements. Graphic Abstract