Changes in strength of Scots pine wood (Pinus silvestris L.) decayed by brown rot (Coniophora puteana) and white rot (Trametes versicolor)

Witomski, Piotr; Olek, Wiesław; Bonarski, J.

doi:10.1016/j.conbuildmat.2015.10.109

Cited by 45 publications

(20 citation statements)

References 9 publications

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“…Therefore, the chemical analysis confirmed that the cellulose and hemicellulose were degraded by the fungus, whereas the lignin was less degraded, as expected by a brown rot agent (Eaton & Hale 1993). On the opposite, the intensity of 1371 cm -1 (C-H, associated to polysaccharide), 1469 cm -1 (C-H, associated to lignin) peaks did not change so much during the test, which is in agreement with the findings by Witomski et al (2016). Compared to the decayed wood in the waterlogged conditions (Lin et al 2009, Pizzo et al 2015, the intensity of 1370 cm -1 (C-H), 1158 cm -1 (C-O-C), and 1104 cm -1 (O-H) was decreased, while the 1733 cm -1 (C=O) was also decreased, which is contrasting with out results.…”

Section: Artificial Decaysupporting

confidence: 91%

“…The loss of strength properties, both tensile and compressive, can be described as merely constant with the development of degradation by fungi. A linear relationship between mass loss and strength properties was found for Douglas fir in bending (Winandy & Morrell 1993) and for Scot pine in compression (Witomski et al 2016), while for the last species, the relationship between bending strength and mass loss was better described by an exponential function (Witomski et al 2016).…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…Later, Winandy & Morrell (1993) found a linear relationship between the weight losses due to brown rot and the bending strength losses in Douglas fir (Pseudotsuga menziesii). A drastic decrease in bending strength and modulus of elasticity (MOE) was observed in Scots pine during the initial phase of decay and this change was exponential: a 50% decrease in bending strength for 7% of mass loss in the case of brown rot and 20% for white rot; MOE values were reduced by about 50% in the case of white rot for a mass loss of 40%, while for brown rot a 50% decrease in MOE was found after a mass decrease as low as 20% (Witomski et al 2016). Looking at these findings, other authors proposed to use wood MOE as an indicator of rot-fungal attack, and the results showed actually that it is a sensitive and re-liable indicator of rot-fungal attack, regardless of fungus or wood species.…”

Section: Introductionmentioning

confidence: 99%

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

Li¹,

Gao²,

Brunetti³

et al. 2019

iForest

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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.

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Section: Artificial Decaysupporting

confidence: 91%

Section: Mechanical Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Li¹,

Gao²,

Brunetti³

et al. 2019

iForest

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“…Semiconductivity is one of the most important TiO 2 features; it presents a band gap between 3.0 and 3.2 eV, which corresponds to UV-region wavelengths, a fact that makes it photoactive (presenting photocatalytic activity under UV light) (Wunderlich et al, 2004). This property assures fungicidal and bactericidal action on the material used as substrate (Huang et al, 2000;De Filpo et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Resistance of TiO2-treated Eucalyptus botryoides Wood to the Fungus Ganoderma applanatum

et al. 2018

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The aim of the present study is to investigate the resistance of Eucalyptus botryoides treated with TiO 2 particles to attack by the fungus Ganoderma applanatum. The Bethel treatment method was applied to wood specimens (25 × 25 × 9 mm) and compared to CCB. The wood was subjected to the accelerated decay test and characterized through Rockwell Hardness and Fourier Transform Infrared Spectroscopy (FT-IR). The TiO 2 -treated wood showed lower degradation and greater resistance to the penetration of a steel sphere (Rockwell Hardness) than the untreated wood. In addition, the results of the TiO 2 treatment were statistically equal to those of CCB. The FT-IR analysis showed that the fungus degraded lignin and hemicellulose in untreated samples. The present results showed the TiO 2 efficiency in forming a protective layer on the cell wall and in preventing the development of microorganisms, a fact that verifies its fungicidal action on wood.

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“…Wood mechanical strength loss owing to fungal decay is well known in the forest products literature (e.g., Brischke et al (2008) and Witomski et al (2016)). Such studies typically involve inoculation of sound wood with selected fungi, followed by laboratory incubation for specified periods and ultimately strength tests (Witomski et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Woody material structural degradation through decomposition on the forest floor

et al. 2018

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Dead woody material (DWM) plays numerous important roles in forest ecosystems; however, through the process of decomposition, it undergoes structural and chemical changes that progressively alter its function in these roles. Much remains unknown about how DWM mechanical strength and structural integrity change through decomposition in natural forest settings. We assessed changes in wood strength (bending strength, compressive strength, and surface hardness) using standard wood stakes of known initial mass from three species. The stakes were placed in forested settings for two and four years before collection for laboratory analyses. All three strength metrics decreased as stakes lost mass due to decay; however, bending strength had the strongest relationship with mass loss, a result that was consistent for all species, as well as species-pooled data. Results for all strength-loss metrics indicate that stakes had experienced ca. 10% strength loss before any detectable mass loss had occurred. Further, our results suggest that the decay class system typically used during field inventories — based in large part on tactile assessments of wood structural integrity — may provide a reasonable characterization of DWM mass loss, which is a critical assumption for carbon accounting and modelling based on inventory data.

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Changes in strength of Scots pine wood (Pinus silvestris L.) decayed by brown rot (Coniophora puteana) and white rot (Trametes versicolor)

Cited by 45 publications

References 9 publications

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

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

Resistance of TiO2-treated Eucalyptus botryoides Wood to the Fungus Ganoderma applanatum

Woody material structural degradation through decomposition on the forest floor

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