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Mechanical and physical properties of Cunninghamia lanceolata wood decayed by brown rot

Shengcai Li (1)   , Yuewen Gao (1), Michele Brunetti (2), Nicola Macchioni (2), Michela Nocetti (2), Sabrina Palanti (2)

iForest - Biogeosciences and Forestry, Volume 12, Issue 3, Pages 317-322 (2019)
doi: https://doi.org/10.3832/ifor2922-012
Published: Jun 06, 2019 - Copyright © 2019 SISEF

Research Articles


The relationship between the mechanical properties of Cunninghamia lanceolata (Chinese fir) wood and the development of fungal decay was investigated with the aim of implementing a statistical model useful as a non-destructive and a fast method for determining the state of conservation of in-service timber structures. Artificial decay due to brown rot fungi was induced on wood specimens and physical and mechanical test were performed periodically, as well as anatomical observation of wood, FT-IR spectroscopic and XRD diffraction analysis. As a result, Chinese fir was confirmed to have a good durability against fungi, showing a mass loss percentage of 7.21% on average after 14 weeks of exposure. On the contrary, the mechanical properties reduced dramatically during the decay test: a 19% decrease was observed for compression strength and 21% for tensile strength. The mechanism of decay was explored and the corresponding damage constitutive model was proposed.

  Keywords


Wooden Construction, Brown Rot, Mass Loss Rate, Wood Decay, Wood Strength

Authors’ address

(1)
Shengcai Li 0000-0003-4925-4178
Yuewen Gao
School of Architectural Science and Civil Engineering, Yangzhou University (China)
(2)
Michele Brunetti
Nicola Macchioni 0000-0001-8648-0073
Michela Nocetti
Sabrina Palanti 0000-0002-9033-8827
CNR-IVALSA, v. Madonna del Piano 6, I-50019 Sesto Fiorentino (Italy)

Corresponding author

 
Shengcai Li
lisc@yzu.edu.cn

Citation

Li S, Gao Y, Brunetti M, Macchioni N, Nocetti M, Palanti S (2019). Mechanical and physical properties of Cunninghamia lanceolata wood decayed by brown rot. iForest 12: 317-322. - doi: 10.3832/ifor2922-012

Academic Editor

Rodolfo Picchio

Paper history

Received: Jul 18, 2018
Accepted: Apr 03, 2019

First online: Jun 06, 2019
Publication Date: Jun 30, 2019
Publication Time: 2.13 months

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