Preparation, properties and applications of fly ash-based …
Fig. 2 shows the reaction mechanisms of using alkali-activated fly ash for the preparation of geopolymers (Fernández-Jiménez et al., 2005; Singh, 2018).The reactions that occur in the preparation of fly ash-based geopolymers are very complicated. As shown in Fig. 2 (a), the simplified primary reaction of fly ash-based geopolymer is the condensation between …