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Official Journal of the Japan Wood Research Society

Table 2 Results of the thermal conductive property measurements performed with the solid carbon dioxide as chilling agent for commonly used structural timber species in transverse directions (mean ± SE)

From: Investigation of thermal conductive properties of structural timbers at low temperature region using solid carbon dioxide as a chilling agent

Species

Direction

Density (kg/m3)

Porosity (r)

Cooling rate (°C/min)

Min. temperature (°)

Duration in CTmin temp. range (min)

Japanese cedar

Radial

381 ± 9

0.746 ± 0.006

−0.27 ± 0.00

−22.5 ± 0.7

490 ± 13

Tangential

358 ± 8

0.761 ± 0.006

−0.26 ± 0.01

−25.2 ± 0.8

453 ± 22

Japanese cypress

Radial

480 ± 15

0.680 ± 0.020

−0.19 ± 0.00

−22.0 ± 0.6

180 ± 8

Tangential

474 ± 7

0.684 ± 0.005

−0.19 ± 0.00

−21.6 ± 0.6

170 ± 6

Sitka spruce

Radial

438 ± 9

0.708 ± 0.006

−0.24 ± 0.01

−24.2 ± 0.3

420 ± 11

Tangential

439 ± 4

0.707 ± 0.003

−0.23 ± 0.01

−23.3 ± 0.7

398 ± 8

Douglas fir

Radial

564 ± 26

0.624 ± 0.017

−0.27 ± 0.01

−26.4 ± 1.0

420 ± 11

Tangential

645 ± 9

0.570 ± 0.006

−0.24 ± 0.01

−25.2 ± 0.9

490 ± 16