| Mix no. | Mix symbol | BS (g) | L/B ratio | NaOH (M) |
| 1 | BS1 | 100 | 0.35 | 2.5 |
| 2 | BS2 | 100 | 0.35 | 5.0 |
| 3 | BS3 | 100 | 0.35 | 7.5 |
| 4 | BS4 | 100 | 0.35 | 10 |