Evaluation of engineering characteristics of decayed thermo-wood by brown rot fungus

Hajihassani, Reza; Masoomeh, Seyedeh; Ghahri, Saman; Salehi, Kamyar

doi:10.22092/ijwpr.2022.359051.1720

Document Type : Research Paper

Authors

¹ Assistant Prof., Wood and Forest Products Science Research Division, Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO) P.O. Box 13185-116, Tehran, Iran

² Assistant Prof., Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO), Tehran, Iran.

³ Assistant Prof., Wood and Forest Products Science Research Division, Research institute of forests and rangelands, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran

⁴ MSc., wood and paper, Research Institute of Forests and Rangelands

https://doi.org/10.22092/ijwpr.2022.359051.1720

Abstract

Abstract
The purpose of this study was to investigate the effect of heat treatment on bio-durability and some physical and mechanical properties of beech (Fagus Sp.) and pine (Pinus Sp.). Thermo-wood samples were prepared from beech and pine species based on thermo-D process. Heat-treated and untreated wood specimens were evaluated after exposing to brown rot fungus for 16 weeks. The laccase activity and its effect on mass loss and wood density were investigated. Results showed that deterrence value of heat treatment on mass loss caused by brown rot fungus have been 76.92% and 44.32% in beech and pine wood, respectively. So, laccase activity and its efficiency on mass loss of control specimens was more than heat treated wood. The results also showed that thermally modification at high temperatures reduced wood density. However, it had deterrent effect on decrease of density caused by brown rot fungus activity. Moreover, some mechanical properties including impact strength and compression parallel to grain of wood specimens were measured. The results generally showed that thermal modification improves the bio-durability of both wood species. The results also revealed reduction of mechanical properties due to heat treatment except compression parallel to grain.

Keywords

20.1001.1.17350913.1401.37.4.4.5

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Iranian Journal of Wood and Paper Science Research

Evaluation of engineering characteristics of decayed thermo-wood by brown rot fungus

References

References

Volume 37, Issue 4 - Serial Number 81
December 2022
Pages 306-317

Evaluation of engineering characteristics of decayed thermo-wood by brown rot fungus

References

References

Volume 37, Issue 4 - Serial Number 81December 2022Pages 306-317

Volume 37, Issue 4 - Serial Number 81
December 2022
Pages 306-317