| Typology | 3-blocks / 2-blocks prisms |
|---|---|
| Uncoated prisms | 0.98 |
| Prisms with a coating of 3 cm and mix ratio 1:2:9 | 0.89 |
| Prisms with a coating of 3 cm of mix ratio 1:1:6 | 1.16 |
| Prisms with a coating of 3 cm and mix ratio 1:1:6 reinforced | 0.90 |
| Average = | 0.98 |
| Standard Deviation = | 0.12 |
| Coefficient of Variation = | 13% |