論文

査読有り
2021年6月

Comparison of natural durability of wood by stake tests followed by survival analysis

Journal of Wood Science
  • Ikuo Momohara
  • ,
  • Haruko Sakai
  • ,
  • Hiroshi Kurisaki
  • ,
  • Wakako Ohmura
  • ,
  • Toshikazu Kakutani
  • ,
  • Tokio Sekizawa
  • ,
  • Yuji Imamura

67
44
記述言語
掲載種別
研究論文(学術雑誌)
DOI
10.1186/s10086-021-01976-6
出版者・発行元
Springer Science and Business Media LLC

<title>Abstract</title>The conventional stake test is widely used to evaluate wood durability. The test monitors the deterioration level observed on stakes partially inserted into the ground. The test results are conventionally expressed as the relationship between the mean deterioration level and exposure periods. Durability is compared between the stake groups based on the test results; however, there is no scientific basis for the comparison. To include a scientific basis to the conventional stake test, we applied survival analysis to it. Four stake groups were subjected to deterioration at three sites for 7 years. The deterioration levels were monitored according to the conventional procedure, and survival analysis was applied to the monitored data. The Kaplan–Meier curves plotting the survival probabilities against the exposure periods indicated that the durability of the test stakes of Japanese cedar heartwood is higher than those of Japanese cedar sapwood. However, it was also demonstrated that the durability ratio between Japanese cedar heartwood and sapwood was strongly dependent on the test sites. It was also revealed that the durability of the heartwood portion did not differ significantly among Japanese cedar, Japanese cypress, and Japanese larch. These results were verified using the modified Gehan–Wilcoxon test.

リンク情報
DOI
https://doi.org/10.1186/s10086-021-01976-6
URL
https://link.springer.com/content/pdf/10.1186/s10086-021-01976-6.pdf
URL
https://link.springer.com/article/10.1186/s10086-021-01976-6/fulltext.html
ID情報
  • DOI : 10.1186/s10086-021-01976-6
  • ISSN : 1435-0211
  • eISSN : 1611-4663

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