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Erschienen in:
2023 | OriginalPaper | Buchkapitel
3. Silica Fume as an Activator Component
verfasst von : Alaa M. Rashad
Erschienen in: Silica Fume in Geopolymers
Verlag: Springer Nature Switzerland
Abstract
As known, NaOH and sodium silicate are widely used as alkaline activators for preparing geopolymers due to better obtained strength. Unfortunately, the manufacture of these activators is somewhat costly and requires a lot of energy. This is particularly true for sodium silicate, which is made by melting sodium carbonate and sand at 1350–1450 °C, then dissolving the glass that is created in an autoclave at 140–160 °C under the prober steam pressure. This procedure generates a lot of CO2 emissions. Employing by-product material such as silica fume (SF) as a part of activator may mitigate these problems. In this part, the earlier studies that used SF as a part of activator were collected. The effect of this activator on the properties of different geopolymer types was reviewed, summarized and analysed.
