Table of Contents
Materials, Volume 12, Issue 4 (February-2 2019)
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Cover Story (view full-size image) Aqueous suspensions of soda lime glass and coal fly ash were activated with NaOH (3M). Despite the [...] Read more. Aqueous suspensions of soda lime glass and coal fly ash were activated with NaOH (3M). Despite the relatively low molarity (compared to geopolymer-yielding mixtures), the suspensions underwent gelation and presented a marked pseudoplastic behaviour. A significant foaming could be achieved by air incorporation, in turn resulting from intensive mechanical stirring (with the help of a surfactant), before complete hardening. Dried foams were later transformed, by heat treatment at 700-900 °C, into porous glass-ceramics, exhibiting a remarkable crushing strength (6 MPa, with a porosity of about 70%) and a low thermal conductivity, coupled with good stabilization of pollutants from the starting waste. View this paper.