Recycling of waste glasses into partially crystallized glass foams |
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Authors: | Enrico Bernardo Giovanni Scarinci Paolo Bertuzzi Piero Ercole Ludovico Ramon |
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Affiliation: | 1.Dipartimento di Ingegneria Meccanica—Settore Materiali,Università di Padova,Padova,Italy;2.SASIL SpA,Brusnengo,Italy |
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Abstract: | Waste soda-lime glass, alone or mixed with wastes from the manufacturing of glass fibers, was successfully converted into
partially crystallized glass foams by a particularly simple and economic processing, consisting of a direct heating of glass
powders at temperatures from 900 to 1050 °C. The foaming operated by the oxidation of SiC, inserted as powder additive, was
found to depend on a complex combination of processing temperature, soaking time, tendency of the investigated glasses toward
devitrification, and amount of MnO2, acting as oxidation promoter. Selected combinations led to foams with a good microstructural homogeneity and mechanical
strength, suitable for application as aggregates in lightweight concrete. |
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