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EnglishLadle slag (LS) and urban incineration bottom ash (BA) are two wastes which are necessarily disposed of with few attention for re-use or recycling. Their chemical composition contains silica and alumina accompanied by lime and iron oxides. Mineralogically speaking a number of silicate and silicoaluminate phases are present combined with 20-30 vol% of amorphous matrix. The presence of an important amount of vitreous phase makes LS and BA particularly reactive in alkali media. The geopolymerisation process of 70 wt% of LS or of BA in a metakaolin matrix has been characterized in terms of morphology and crystalline phases evolution.
| Titolo: | Alkali activation for geopolymers preparation |
| Autore/i: | Cristina Leonelli; Isabella Lancellotti; Chiara Ponzoni; Luisa Barbieri; BIGNOZZI, MARIA |
| Autore/i Unibo: | |
| Anno: | 2013 |
| Titolo del libro: | Proceeding of the Third International Slag Valorization Symposium “The transition to sustainable materials management” |
| Pagina iniziale: | 269 |
| Pagina finale: | 277 |
| Abstract: | Ladle slag (LS) and urban incineration bottom ash (BA) are two wastes which are necessarily disposed of with few attention for re-use or recycling. Their chemical composition contains silica and alumina accompanied by lime and iron oxides. Mineralogically speaking a number of silicate and silicoaluminate phases are present combined with 20-30 vol% of amorphous matrix. The presence of an important amount of vitreous phase makes LS and BA particularly reactive in alkali media. The geopolymerisation process of 70 wt% of LS or of BA in a metakaolin matrix has been characterized in terms of morphology and crystalline phases evolution. |
| Data prodotto definitivo in UGOV: | 30-giu-2013 |
| Appare nelle tipologie: | 4.01 Contributo in Atti di convegno |
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