Table 2 Ratios of density and Young’s modulus obtained by the vibration method with additional mass to those without the concentrated mass (1000-mm-long specimens)

Versus compressed specimen without a concentrated mass

 2nd

0.93 (0.063)

0.98 (0.090)

1.13 (0.17)

4.22 (9.22)

 3rd

0.99 (0.11)

1.00 (0.097)

1.27 (0.72)

2.51 (3.15)

Versus non-compressed specimen without a concentrated mass

 2nd

0.93 (0.065)

0.98 (0.091)

1.14 (0.17)

4.22 (9.21)

 3rd

0.99 (0.11)

1.00 (0.096)

1.27 (0.72)

2.52 (3.16)