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Volume 33 (2007)
- Issue 6 Pages 268-
- Issue 5 Pages 212-
- Issue 4 Pages 160-
- Issue 3 Pages 102-
- Issue 2 Pages 48-
- Issue 1 Pages 2-
Volume 33, Issue 2
Displaying 1-7 of 7 articles from this issue
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[in Japanese]2007 Volume 33 Issue 2 Pages 48-57
Published: March 25, 2007
Released on J-STAGE: May 22, 2009
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[in Japanese]2007 Volume 33 Issue 2 Pages 58-62
Published: March 25, 2007
Released on J-STAGE: May 22, 2009
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Adsorption characteristics of lignophenol to hardwood degraded in various degrees, and suface hardness and adsorption/desorption of moisture in the treated hardwoodTaro KATAOKA, Yasuji KURIMOTO, Yohsei KOHDZUMA2007 Volume 33 Issue 2 Pages 63-72
Published: March 25, 2007
Released on J-STAGE: May 22, 2009
JOURNAL FREE ACCESSThe amounts of lignophenol and polyethylene glycol 4000 (PEG4000) adsorbed by waterlogged wood in various degradation degrees were compared, and surface hardness of the samples treated with the lignophenol and PEG4000 were evaluated by a compression test. Average of maximum moisture content (MMC) was defined as degradation degree.
Samples were pieces of waterlogged wood of Tochinoki (Aesculus turbinata Blume) with an MMC of 284%, and Doronoki (Populus maximowiczii A.Henry) with MMCs of 902% and 1178%.
The saturated adsorption amounts of the lignophenol per unit weight in MMC 284% samples were not so different from those of PEG4000, and in MMC 902% and 1178% samples, the amounts were larger than those of PEG4000. In each MMC, wood hardness was consequently greater in the samples treated with lignophenol than that treated with PEG4000. Because of decrease in wood substance, however, the saturated adsorption amounts of lignophenol and PEG4000 per unit volume and hardness decreased in the samples with higher degradation degree. In each MMC, weight changes of the samples treated with lignophenol were small when the samples were exposed between 20%RH and 90%RH repeatedly. Therefore, the dimensional stability was improved by the increased hydrophobicity of cell walls. These results showed conservation using lignophenol was effective to waterlogged wood in the various degradation degrees.View full abstractDownload PDF (740K) -
[in Japanese], [in Japanese], [in Japanese], [in Japanese]2007 Volume 33 Issue 2 Pages 73-80
Published: March 25, 2007
Released on J-STAGE: May 22, 2009
JOURNAL FREE ACCESSDiagnosis of deterioration of the wood by drilling resistance was made using a resistograph in-stument made by IML. co.
The criteria to estimate that the deterioration happened was defined from the relationship be-tween resistance average and bulk density (Fig. 6) as the following ; the resistance average in the depth over 10mm was 2 resi and below for Sugi wood (Cryptomeria japonica D. Don), and 3 resi and below for Hinoki wood (Chamaecyparis obtusa Endl.).
Using the criteria, the deterioration variation of the inside of the piles was made clear quantitatively And these were found that the deterioration rate of the piles covered with polyethylene resin was slower than that of the uncovered piles, and the covered piles did not decay except for a few parts of sapwood, while being set in the ground in an upright position with about half of their length for three years.View full abstractDownload PDF (4934K) -
[in Japanese]2007 Volume 33 Issue 2 Pages 81-83
Published: March 25, 2007
Released on J-STAGE: May 22, 2009
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[in Japanese]2007 Volume 33 Issue 2 Pages 84-86
Published: March 25, 2007
Released on J-STAGE: May 22, 2009
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[in Japanese]2007 Volume 33 Issue 2 Pages 87-90
Published: March 25, 2007
Released on J-STAGE: May 22, 2009
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