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Stage II: the second stage of mixture design.
| Sample No. | SS17 | SS18 | SS14 | SS19 | SS20 | SS21 | SS22 | SS15 | SS23 |
|---|---|---|---|---|---|---|---|---|---|
| Alkali/% | 18 | 18 | 18 | 18 | 18 | 18 | 20 | 20 | 20 |
| Modulus | 0.4 | 0.6 | 0.8 | 1.0 | 1.2 | 1.4 | 0.4 | 0.6 | 0.8 |
| Sample No. | SS24 | SS25 | SS26 | SS16 | SS27 | SS28 | SS29 | SS30 | SS31 |
| Alkali/% | 20 | 20 | 20 | 22 | 22 | 22 | 22 | 22 | 22 |
| Modulus | 1.0 | 1.2 | 1.4 | 0.4 | 0.6 | 0.8 | 1.0 | 1.2 | 1.4 |
