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Investigation on the Durability of used Wood, Japanese Hinoki, as Materials of Construction for Forest Strip Road

Research Project

Project/Area Number 03806024
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 林学
Research InstitutionShizuoka University

Principal Investigator

IWAKAWA Osamu  Shizuoka Univ., Fac. of Agri. Professor, 農学部, 教授 (40024533)

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)
Project Period (FY) 1991 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1992: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1991: ¥1,300,000 (Direct Cost: ¥1,300,000)
KeywordsStrip road / Woody construction / Durability of round wood / Japanese Hinoki / Utilization of thinning trees / 使用木材の耐久性 / 間伐材の活用
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.

Report

(3 results)
  • 1992 Annual Research Report   Final Research Report Summary
  • 1991 Annual Research Report
  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] Iwakawa O.: "A possibility of wood constructions for strip roads based on the durability of used woods." Journal of horest Engineering,New Brunswick University Canada. (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Iwakawa, Osamu: "A possibility of wood constructions for strip roads based on the durability of used woods." Journal of Forest Engineering New Brunswick University, Canada July 1993.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Iwakawa O.: "A possibility of wood constructions for strip roods based on the durability of used woods" Journal of Forest Engineering,New Brunswick University Canada. 1993.7月号 予定. (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] Osamu IWAKAWA: "Durability of used woods as materials of constructions for strip roads" University of New Brunswick,Canada.Journal of Forest Engineering in Canada.

    • Related Report
      1991 Annual Research Report

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Published: 1991-04-01   Modified: 2016-04-21  

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