Table 1 Ion leaching test scheme for alkali-activated low-calcium fly ash with different NaOH concentrations and soaking times.
NaOH concentration (mol L−1) | Solution volume (mL) | Fly ash samples (g) | Soaking time (h) | |||||
|---|---|---|---|---|---|---|---|---|
3 | 6 | 12 | 24 | 48 | 72 | |||
0 | 400 | 100 | A1 | A2 | A3 | A4 | A5 | A6 |
0.25 | 400 | 100 | B1 | B2 | B3 | B4 | B5 | B6 |
0.75 | 400 | 100 | C1 | C2 | C3 | C4 | C5 | C6 |
1.25 | 400 | 100 | D1 | D2 | D3 | D4 | D5 | D6 |
2 | 400 | 100 | E1 | E2 | E3 | E4 | E5 | E6 |