Research Article
The Measurement of P-, S-, and R-Wave Velocities to Evaluate the Condition of Reinforced and Prestressed Concrete Slabs
Table 6
Comparison of dynamic moduli from ultrasonic and static tests.
| Measurement | Slab | Ultrasonic test | Static test | Error | Avg m/s | Edu (GPa) | | fck (Mpa) | (GPa) | (GPa) |
| P-wave | S1 | 3285 | 22.80 | 0.16 | 14.84 | 17.68 | 21.30 | 7.01% | S2 | 3367 | 23.96 | 0.16 | 14.84 | 17.68 | 21.30 | 12.46% | S3 | 3362 | 23.88 | 0.16 | 14.84 | 17.68 | 21.30 | 12.09% |
| S-wave | S1 | 1910 | 22.67 | 0.16 | 14.84 | 17.68 | 21.30 | 6.43% | S2 | 1960 | 23.87 | 0.16 | 14.84 | 17.68 | 21.30 | 12.07% | S3 | 1950 | 23.63 | 0.16 | 14.84 | 17.68 | 21.30 | 10.93% |
| R-wave | S1 | 1880 | 22.55 | 0.16 | 14.84 | 17.68 | 21.30 | 5.86% | S2 | 1934 | 23.87 | 0.16 | 14.84 | 17.68 | 21.30 | 12.06% | S3 | 1918 | 23.46 | 0.16 | 14.84 | 17.68 | 21.30 | 10.15% |
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Edu: dynamic modulus by ultrasonic test, fck: 28-day compressive strength.
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