Table 25.
Impact of water storage and Bacillus subtilis attack on technical constants calculated from experimental data with ultrasonic velocity method [62].
| Wood specimens | Density | Technical constants calculated with ultrasonic velocity method |
|||||
|---|---|---|---|---|---|---|---|
| Young moduli (108 N/m2) | Shear moduli (108 N/m2) | ||||||
| Picea abies | (kg/m3) | EL | ER | ET | GRT | GLT | GLR |
| Sound | 407 | 86 | 13 | 3 | 1.80 | 6.63 | 7.92 |
| Attacked | 383 | 78 | 11 | 4 | 1.24 | 5.75 | 8.40 |
| Difference % | −6 | −10 | −13 | +20 | −31 | −13 | +6 |
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