1992 Fiscal Year Final Research Report Summary
Investigation on the Durability of used Wood, Japanese Hinoki, as Materials of Construction for Forest Strip Road
| Project/Area Number |
03806024
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
林学
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| Research Institution | Shizuoka University |
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Principal Investigator |
IWAKAWA Osamu Shizuoka Univ., Fac. of Agri. Professor, 農学部, 教授 (40024533)
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| Co-Investigator(Kenkyū-buntansha) |
SUZUKI Shigehiko Shizuoka Univ., Fac. of Agri. Assistant, 農学部, 助手 (40115449)
SAITO Toichi Shizuoka Univ., Fac. of Agri. Professor, 農学部, 教授 (20022163)
FURUTANI Shiro Shizuoka Univ., Fac. of Agri. Associate Professor, 農学部, 助教授 (10022063)
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| Project Period (FY) |
1991 – 1992
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| Keywords | Strip road / Woody construction / Durability of round wood / Japanese Hinoki / Utilization of thinning trees |
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| Research Abstract |
Japan has a lot of man-made forest about 10 million hectares consisting of Japanese Hinoki and Sugi, so that a way to utilize effectively the thinning trees produced on site is very important to Japanese forestry.
From this purpose, this research discusses the possibility of used woods for strip road. This paper discussed only Japanese Hinoki. The durability of used woods was compared with those of fresh woods as standard samples by means of Brinnel hardness, compression strength and bending strength. From experiments, the followings were drawn: (1) the Brinnel hardness of the used wood was less than those of the standard. The aging was realized a little. However, it was concluded that the result was not sighnificant statistically. (2) The compression strength, Young's modulus in compression parpendicular to the grain of wood, did not decrease in two years use. (3) The bending strength was scarecely different between the two years used wood and standard wood. (4) Among some woods buried into a wet place, some of sapwoods damaged by white ants were observed, but its damage was not found in the heart wood.
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