| Metakaolins (% w/w) | MK1 | MK2 | MK3 | MK4 | OPC |
| 20 | 0.29 | 0.31 | 0.29 | 0.28 | 0.27 |
| 30 | 0.31 | 0.35 | 0.31 | 0.30 | |
| 50 | 0.33 | 0.39 | 0.33 | 0.33 |