Bacterial and mold resistance of selected tropical wood species

Reinprecht, Ladislav; Vidholdová, Zuzana; Iždinský, Ján

doi:10.15376/biores.15.3.5198-5209

Cited by 9 publications

(3 citation statements)

References 32 publications

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“…The vapor barrier influence on the materials moisture content and water vapor condensation in timber structures is also verified in [7][8][9][10][11][12][13]. Materials biodegradation in timber structures is verified in [14][15][16].…”

Section: Introductionmentioning

confidence: 93%

Impact of Vapor Barrier on Moisture Content of Fiberboard Insulation in Log Structure

et al. 2021

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The paper is focused on a verification of the moisture content of fiberboard insulations in the multilayer loadbearing log wall designed with and without the vapor barrier. Experimental verification was done using a sample of the multilayer loadbearing log wall built in a research timber structure building under in-situ conditions. Indoor properties of the building met conditions for human occupancy. The experiment was performed for 2 years and 3 months. Aims of the fiberboard insulations moisture content verification in the walls were to verify the effect of vapor barrier in various periods of the year and verify excessive moisture in the fiberboard insulations, which is undesirable in terms of biodegradation. The results of measuring the moisture content showed that after a certain period, the difference of insulation moisture content in the wall including and excluding vapor barrier is negligible, as well as other results and conclusions for designing the composition of multilayer loadbearing log walls.

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Section: Introductionmentioning

confidence: 93%

Impact of Vapor Barrier on Moisture Content of Fiberboard Insulation in Log Structure

et al. 2021

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“…Rainwater that falls on the wood's surface will saturate and leach the wood. The process of water-leaching makes red meranti wood more susceptible to decay fungi [29]. Red meranti is more easily attacked by fungi than bangkirai wood because bangkirai wood has less polysaccharide components [30].…”

Section: Wood Vessel Cells Begin To Change Colour To Greyish-brown 60mentioning

confidence: 99%

Analysis of Changes in Vessel Cells of Meranti and Bangkirai Wood Placed Outdoors

Fernandes,

Erwin,

Karyadi

et al. 2024

BIO Web Conf.

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Wood, as a renewable material, can be used for indoor and outdoor products. Meranti and Bangkirai as commercial woods, are used outdoors. The wood used outdoors will experience wood cell damage and discoloration on the surface. The research aims to determine the pattern of damage and discoloration of wood vessel cells in Meranti and Bangkirai wood due to weather exposure for 5 months in Samarinda. The wood cell damage was observed microscopically, and changes in wood vessel cells colour were observed using the CIE lab method on parameters L*, a*, b*, and ΔE. The study’s results showed that after being exposed to the weather for 2 months, the vessel cells of Meranti and Bangkirai wood began to experience degradation. In Meranti wood, the vessel cells were completely degraded and left cracks after 4 months, while in Bangkirai wood, it was 5 months. After being exposed to the weather for 5 months, Meranti wood vessel cells experienced changes in the parameters ΔL -10.65, Δa -14.68, Δb -12.89, and ΔE 22.25. While Bangkirai, ΔL -7.01, Δa -12.84, Δb 15.95 and ΔE 21.64.

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“…Reinprecht and Vidholdová [8] investigated the mechanical properties and mold resistance of thermally modified wood. Boonstra [9] described the changes in wood that occurs during a two-phase thermal modification of wood.…”

Section: Introductionmentioning

confidence: 99%

Holographic Interferometry for Measuring the Effect of Thermal Modification on Wood Thermal Properties

2021

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The paper focuses on the use of holographic interferometry in the research of thermal modification and its effect on the heat transfer from the wood surface to the surrounding air. In the experiment, spruce wood samples modified at 160 °C, 180 °C, 200 °C, 220 °C and an unmodified control sample were used. A radiant heat source was placed under the sample. The top of the sample represented the boundary where the observed heat transfer occurred. The temperature fields above the sample were visualized by real-time holographic interferometry and the heat transfer coefficient α was calculated from the obtained interferograms. During the heating of the samples, a decrease of the heat transfer coefficient was observed. The heat transfer coefficient of the control unmodified sample decreased from a maximum of α = 22.66 Wm–2K–1 to a minimum of α = 8.6 Wm–2K–1. In comparison with these values, the heat transfer coefficients of the modified samples treated at 160, 180, 200 and 220 °C, respectively, decreased to 99%, 93%, 68% and 51% of the maximal control value at the beginning of experiment and to 95%, 86%, 80% and 64% of the minimal control value by the end of the experiment. Moreover, an analysis of variance was used to determine the significance of the heat treatment effect on the heat transfer coefficient. A high significance (p < 5%) was observed between the control sample and the modified samples treated at 200 °C and 220 °C. Experiments with the use of holographic interferometry produced results consistent with previous studies conducted by different methods.

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Bacterial and mold resistance of selected tropical wood species

Cited by 9 publications

References 32 publications

Impact of Vapor Barrier on Moisture Content of Fiberboard Insulation in Log Structure

Impact of Vapor Barrier on Moisture Content of Fiberboard Insulation in Log Structure

Analysis of Changes in Vessel Cells of Meranti and Bangkirai Wood Placed Outdoors

Holographic Interferometry for Measuring the Effect of Thermal Modification on Wood Thermal Properties

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