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Summary of ion concentration of cementitious containing fly ash.
| Cementitious system | Ion concentration | |||
|---|---|---|---|---|
| Hydroxyl | Aluminate | Silicate | Calcium | |
| With fly ash | ↓ | ↑ | ↑ | ↓ |
| Without fly ash | ↑ | ↓ | ↓ | ↑ |
| Possible cause | Less cement content | Gel formation | More silicon from fly ash | Lime precipitation/less cement content |
