Field tests on the durability of Sugi(Cryptomeria japonica) heartwood treated with wood-tar and wood-vinegar.

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  • 木タール及び木酢液処理したスギ心材の野外杭試験結果
  • シリョウ モク タール オヨビ モクサクエキ ショリ シタ スギ シンザイ ノ ヤガイ クイ シケン ケッカ

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The service life of Sugi (Cryptomeria japonica) heartwood treated with wood-vinegar and wood-tar was estimated by a field stake test. The test site was located in Tsukuba, Ibaraki, Japan. Results after 15 years exposure in a outdoor condition indicated that service life of wood-tar treated-heartwood was 6, 15, 15, and 15 years in the uptake of 61kg/m3, 146kg/m3, 149kg/m3 and 227kg/m3, and that of wood-vinegar treated-heartwood was 5, 6, 7 and 5 years in the uptake of 99kg/m3, 260kg/m3, 480kg/m3 and 639kg/m3 and that of untreated-heartwood was 4 years respectively.

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