Anti-termite field tests of borate treated wood.

DOI JASI Web Site Web Site 1 References

Bibliographic Information

Other Title
  • ホウ素系薬剤処理木材の耐蟻性試験
  • ホウソケイ ヤクザイ ショリ モクザイ ノ タイアリセイ シケン

Search this article

Description

Anti-termite field tests were conducted at a coastal pine forest site in Kagoshima, Japan. Sugi (Cryptomeria japonica), Hinoki (Chamaecyparis obtusa), and some other imported lumbers treated with disodium octaborate tetrahydtate (DOT) were tested under non-exposure (above ground and protected from rain) conditions. Small test pieces of 30 (T) x 30 (R) x 150 (L) mm, and 120 (T) x 120 (R) x 1000 (L) mm of the structural lumbers (the lumbers were followed to cut into 200 mm in length after impregnation), were used for the tests. Impregnated amounts of DOT were generally more into the sapwood than the heartwood of Sugi in small test pieces, however, large differences were not seen between the sapwood and the heartwood of Hinoki. In the case of structural lumbers, sufficient amount of DOT was not impregnated into Sugi and Hinoki without pressure process after vacuum. Even after pressure process, impregnated amounts of DOT were less into the imported species. Termite attack started earlier at the test field for structural lumbers than that for small size test pieces. As a result of four years observation, DOT impregnated materials will be able to expect sufficient resistance against termite attack under the non-exposure condition, if the impregnated amounts of the DOT can be properly secured (more than 3% boric acid equivalent).

Journal

References(1)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top