Specimen Sample No. | % of Average Comp. Strength (Mpa) | Average Compressive Strength (Mpa) | Freq. (Hz) |
1 | 74 | 52.8 | 5 |
1 | 69 | 52.8 | 5 |
2 | 80 | 55.8 | 5 |
3 | 74 | 46.2 | 5 |
4 | 75 | 23.1 | 5 |
4 | 75 | 23.1 | 1 |