| The admixture content, % of cement weight (in parentheses the admixture content recalculated to Al2O3, % of cement weight, is shown) | Compressive strength, MPa, at the age, days | ||
| Initial setting time, min | 1 | 28 | |
| Reference paste | 300 | 6.7 | 47.0 |
| Al2(SO4)3 hydrated |
|
|
|
| 3.0 (0.5) | 15 | 7.1 | 62.3 |
| 6.0 (1.0) | <5 | 9.7 | 47.2 |
| FeSO4∙7Н2O |
|
|
|
| 1.35 (0.25) | 15 | 0.0 (at 2 days - 1.3) | 58.1 |
| 2.7 (0.5) | 35 | 0.0 | 45.0 |
| 5.4 (1.0) | 50 | 0.3 | 50.9 |
| Al2(SO4)3 hydrated/FeSO4∙7Н2O |
|
|
|
| 4.1/1.6 (0.7/0.3) | 5 | - | - |
| 3.6/2.2 (0.6/0.4) | 20 | 5.2 | 36.5 |
| 3.0/2.7 (0.5/0.5) | 50 | 5.0 | 50.3 |
| 3.6/3.2 (0.6/0.6) | 20 | 6.1 | 61.0 |
| 2.4/1.6 (0.4/0.3) | 75 | 3.7 | 49.4 |
| Fe2(SO4)3∙9Н2O |
|
|
|
| 1.35 (0.25) | 210 | 1.7 (at 2 days - 7.0) | 59.5 |
| 2.7 (0.5) | 195 | 3.7 | - |
| 5.4 (1.0) | 70 | 5.3 | 51.7 |
| Al2(SO4)3 hydrated/Fe2(SO4)3∙9Н2O |
|
|
|
| 3.0/2.75 (0.5/0.5) | 15 | 6.6 | 60.7 |