| Specimen type | Interface conditon | Spacing of shear reinforcement (mm) | Surface roughness, μ | Interface failure design load, FD (kN) | Peak load, Ft (kN) | Ft/FD | Failure mode |
| SC1 | Smooth | 115 | 0.35 | 2273 | 2412 | 1.06 | Flexural failure |
| SC2 | Indented | 600 | 0.5 | 2273 | 2138 | 0.94 | Shear failure |
| SC3 | Rough | 300 | 0.45 | 2273 | 2152 | 0.92 | Shear failure |