Table 4.
Results of concrete ultrasound velocity test in borehole No. 3.
| 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 | 14.5 | 34.2 | 34.6 | 34.40 | 2.733 | 9.35 |
| 2 | 14.0 | 34.4 | 34.4 | 34.40 | 2.733 | 9.35 |
| 3 | 13.0 | 34.0 | 35.8 | 34.90 | 2.693 | 8.78 |
| 4 | 12.0 | 29.7 | 30.7 | 30.20 | 3.113 | 16.38 |
| 5 | 11.0 | 28.2 | 28.2 | 28.20 | 3.333 | 22.00 |
| 6 | 10.0 | 26.9 | 28.5 | 27.70 | 3.394 | 23.77 |
| 7 | 9.0 | 29.2 | 27.0 | 28.10 | 3.345 | 22.34 |
| 8 | 8.0 | 28.6 | 26.7 | 27.65 | 3.400 | 23.95 |
| 9 | 7.0 | 27.2 | 26.6 | 26.90 | 3.494 | 26.97 |
| 10 | 6.0 | 26.9 | 27.2 | 27.05 | 3.475 | 26.33 |
| 11 | 5.0 | 27.5 | 27.2 | 27.35 | 3.437 | 25.11 |
| 12 | 4.0 | 27.8 | 26.1 | 26.95 | 3.488 | 26.75 |
| 13 | 3.0 | 25.9 | 26.5 | 26.20 | 3.588 | 30.21 |
| 14 | 2.0 | 26.4 | 26.9 | 26.65 | 3.527 | 28.07 |
| 15 | 1.0 | 25.8 | 26.3 | 26.05 | 3.608 | 30.97 |
| 16 | 0.5 | 25.7 | 26.6 | 26.15 | 3.595 | 30.46 |