Table 2.
Results of concrete ultrasound velocity test in borehole No. 1.
| Ordinal Number | Height from the Bottom of the Floor (cm) | Ultrasound Netto Passing Time in Direction I-I tn I-I (μs) | Ultrasound Netto Passing Time in Direction II-II tn II-II (μs) | Mean Ultrasound Netto Passing Time tn (μs) | Ultrasound Wave Velocity CL (km/s) | Concrete Compression Strength fc (MPa) |
|---|---|---|---|---|---|---|
| 1 | 21.5 | 35.3 | 36.2 | 35.75 | 2.615 | 12.47 |
| 2 | 21.0 | 29.8 | 32.0 | 30.90 | 3.026 | 23.39 |
| 3 | 20.5 | 29.4 | 29.3 | 29.35 | 3.186 | 29.20 |
| 4 | 20.0 | 30.2 | 30.2 | 30.20 | 3.096 | 25.81 |
| 5 | 19.5 | 30.5 | 30.9 | 30.70 | 3.046 | 24.06 |
| 6 | 19.0 | 30.1 | 30.6 | 30.35 | 3.081 | 25.27 |
| 7 | 18.5 | 28.6 | 29.8 | 29.20 | 3.202 | 29.84 |
| 8 | 18.0 | 29.5 | 29.7 | 29.60 | 3.159 | 28.15 |
| 9 | 17.0 | 29.4 | 29.2 | 29.30 | 3.191 | 29.40 |
| 10 | 16.0 | 28.5 | 28.4 | 28.45 | 3.286 | 33.36 |
| 11 | 15.0 | 28.4 | 29.9 | 29.15 | 3.208 | 30.08 |
| 12 | 14.0 | 28.8 | 29.8 | 29.30 | 3.191 | 29.40 |
| 13 | 13.0 | 29.1 | 28.7 | 28.90 | 3.235 | 31.18 |
| 14 | 12.0 | 29.4 | 29.4 | 29.40 | 3.180 | 28.96 |
| 15 | 11.0 | 29.2 | 29.9 | 29.55 | 3.164 | 28.34 |
| 16 | 10.0 | 28.5 | 29.7 | 29.10 | 3.213 | 30.28 |
| 17 | 9.0 | 28.5 | 28.8 | 28.65 | 3.264 | 32.40 |
| 18 | 8.0 | 28.3 | 29.4 | 28.85 | 3.241 | 31.43 |
| 19 | 7.0 | 29.2 | 29.5 | 29.35 | 3.186 | 29.20 |
| 20 | 6.0 | 28.3 | 30.2 | 29.25 | 3.197 | 29.63 |
| 21 | 5.0 | 28.8 | 29.3 | 29.05 | 3.219 | 30.52 |
| 22 | 4.0 | 29.0 | 29.2 | 29.10 | 3.213 | 30.28 |
| 23 | 3.0 | 29.7 | 29.8 | 29.75 | 3.143 | 27.54 |
| 24 | 2.0 | 29.2 | 28.6 | 28.90 | 3.235 | 31.18 |
| 25 | 1.0 | 29.5 | 29.2 | 29.35 | 3.186 | 29.20 |