| Treatment Combinations | Average Flexural Strength (MPa)** |
| LS1 (Control) | 0.893a |
| LS2 + PCW | 0.505b |
| LS3 + PCW | 0.414c |
| LS2 + PAW | 0.393cd |
| LS3 + PAW | 0.387de |
| LS4 + PAW | 0.367de |
| LS4 + PCW | 0.243ef |