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Journal articles on the topic 'Wood Moisture Content'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Tian, Panpan, Jianhong Han, Shangjie Guo, Jun Di, and Xia Han. "Prediction Distribution Model of Moisture Content in Laminated Wood Components." Polymers 16, no. 11 (2024): 1453. http://dx.doi.org/10.3390/polym16111453.

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Shrinkage cracks are some of the most common defects in timber structures obtained from woods with an uneven distribution of moisture content and are subject to external dynamic environmental changes. To accurately predict the changes in the moisture content of wood components at any time and position, this study first applied the principles of food drying and established a moisture field model for laminated wood based on the analogy between heat and humidity transfer. A model for predicting the moisture content of wood that considers time and spatial distribution was then proposed. Second, by

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2

Gruver, T. Michael, and Nicole R. Brown. "Penetration and performance of isocyanate wood binders on selected wood species." BioResources 1, no. 2 (2006): 233–47. http://dx.doi.org/10.15376/biores.1.2.233-247.

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The penetration and performance of polymeric diphenylmethane diisocyanate (pMDI) wood binder was investigated according to three factors: substrate species (aspen, yellow-poplar, or southern yellow pine); anatomical bonding plane (radial or tangential); and moisture content (0%, 5%, or 12%). Compression shear block tests and fluorescence microscopy were used to examine bond performance and resin penetration. Statistically, each of the aforementioned factors impacted results. As moisture content increased, observed bond strengths and wood failure increased. Bond formation did not occur when the

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3

Awais, Muhammad, Michael Altgen, Mikko Mäkelä, Tiina Belt, and Lauri Rautkari. "Quantitative prediction of moisture content distribution in acetylated wood using near-infrared hyperspectral imaging." Journal of Materials Science 57, no. 5 (2022): 3416–29. http://dx.doi.org/10.1007/s10853-021-06812-2.

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AbstractThe uptake of moisture severely affects the properties of wood in service applications. Even local moisture content variations may be critical, but such variations are typically not detected by traditional methods to quantify the moisture content of the wood. In this study, we used near-infrared hyperspectral imaging to predict the moisture distribution on wood surfaces at the macroscale. A broad range of wood moisture contents were generated by controlling the acetylation degree of wood and the relative humidity during sample conditioning. Near-infrared image spectra were then measure

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4

Grüll, G., T. Ander, and A. Teischinger. "Wood moisture content of coated wood/aluminium windows." Surface Coatings International Part B: Coatings Transactions 87, no. 2 (2004): 111–19. http://dx.doi.org/10.1007/bf02699605.

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5

Grüll, G., and T. Anderl. "Wood moisture content of coated wood/aluminium windows." Surface Coatings International Part B: Coatings Transactions 87, no. 3 (2004): 203–10. http://dx.doi.org/10.1007/bf02699636.

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6

Fu, Wei-Lian, Hui-Yuan Guan, and Sawata Kei. "Effects of Moisture Content and Grain Direction on the Elastic Properties of Beech Wood Based on Experiment and Finite Element Method." Forests 12, no. 5 (2021): 610. http://dx.doi.org/10.3390/f12050610.

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Beech wood (Fagus sylvatica L.) is used in a wide range of wood products. However, the influence of the wood’s moisture content on its mechanical functions will affect its structural strength. It would be complicated and time-consuming to experimentally measure wood’s mechanical functions under different moisture contents. Therefore, it is necessary to establish a prediction formula between the moisture content and elastic constants, and then verify whether its mechanical functions within a wide range of moisture content can be studied by using FEM (finite element method). In this study, which

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7

Kosiński, Piotr, and Adam Startek. "Moisture transport in loose fibrous insulations subjected to air filtration." Journal of Physics: Conference Series 2628, no. 1 (2023): 012015. http://dx.doi.org/10.1088/1742-6596/2628/1/012015.

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Abstract Fibrous insulations are susceptible to air filtration, which affects both heat loss and moisture transport in the materials. Each fibrous material has individual heat and mass transfer characteristics. This is due to the structure of the fibers, their connections, and their density. The authors performed tests of the air permeability of loose mineral wool and wood wool of different densities and moisture content levels. We are presenting a comparison of materials, and their transport characteristics depending on density and moisture content. Convective moisture flow caused by air filt

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8

Afzal, Muhammad T., Alemayehu H. Bedane, Shahab Sokhansanj, and Waseem Mahmood. "Storage of comminuted and uncomminuted forest biomass and its effect on fuel quality." BioResources 5, no. 1 (2009): 55–69. http://dx.doi.org/10.15376/biores.5.1.55-69.

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White birch was stored in the form of bundles, wood chips, and loose slash for a period of one year to examine the changes in biomass fuel properties. The samples were collected at regular quarterly intervals to measure moisture content, CNS content, ash content, and calorific value. Data loggers were also placed into the stored woody biomass to measure the temperature change inside the piles. After the first quarter of the storage period and continuing into the next three months of storage, the moisture content showed the most significant change. The moisture content of the biomass bundles in

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9

Dobrowolska, Ewa, Mateusz Niedbała, and Daniel Tabaczyński. "Testing of the fatigue strength along wood fibres at different moisture contents." Annals of WULS, Forestry and Wood Technology 115 (September 26, 2021): 45–54. http://dx.doi.org/10.5604/01.3001.0015.5133.

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Testing of the fatigue strength along wood fibres at different moisture contents. The paper determines the effect of wood moisture content on the fatigue strength in compression along fibres. The method of determining the maximum stress at the proportional limit was used for the measurements. Fatigue strength was investigated for three wood species: pedunculate oak (Quercus robur L.), bearded birch (Betula pendula Roth.) and Norway spruce (Picea abies L.), with two moisture contents: close to the absolutely dry state and above the fibre saturation point. The ratio of fatigue strength to short

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10

Juriková, A., and M. Číčel. "Moisture Content Distribution in Wood: Reconstruction." IFAC Proceedings Volumes 19, no. 12 (1986): 163–67. http://dx.doi.org/10.1016/s1474-6670(17)59608-1.

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11

Franke, Bettina, Steffen Franke, Andreas Müller, Mareike Vogel, Florian Scharmacher, and Thomas Tannert. "Long Term Monitoring of Timber Bridges - Assessment and Results." Advanced Materials Research 778 (September 2013): 749–56. http://dx.doi.org/10.4028/www.scientific.net/amr.778.749.

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Timber bridges have been built for decades all around the world. The hygroscopic material behavior of wood leads to the change of the moisture content of the wood and the dimensions depending on the climate. Therefore in regular inspections following questions arise: what happens with the wood due to the climate changes? Are there major changes of the moisture content? Are there differences between the natural material axes or within the cross section of the structural members? To answer these questions, traffic timber bridges with big cross sections are long term monitored within a research p

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12

Xu, Huadong, Qizhe Li, Qun Xu, Zhenyu Bao, Lihai Wang, and Tao Xing. "Effects of brown-rot decay on the electrical resistance of wood and its mechanism." BioResources 14, no. 3 (2019): 6134–45. http://dx.doi.org/10.15376/biores.14.3.6134-6145.

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The objective of this study was to investigate the effect of decay on the electrical resistance (ER) of wood with a high moisture content (> 45%) and to try to determine the mechanism. Poplar wood blocks were exposed to a brown-rot decay fungus (Gloeophyllum trabeum (Pers. ex. Fr.) Murr.) for 2 to 12 weeks to obtain different degrees of decay. The ER values of the non decayed and decayed wood at various moisture contents were measured using a voltammetry method and were statistically analyzed. It was found that the ER of the wood blocks decreased with the fungus exposure time. Changes in th

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13

Ismail, Ras Izzati, Khor Chu Yee, and Alina Rahayu Mohamed. "Thermal Characteristics of Malaysian Khaya Senegalensis Wood Fuel Pellets: Densification-Induced Changes at Different Feedstock Moisture Levels." Journal of Advanced Research in Applied Sciences and Engineering Technology 49, no. 2 (2024): 90–101. http://dx.doi.org/10.37934/araset.49.2.90101.

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This study investigates the thermal behaviour of Malaysian Khaya senegalensis wood energy pellets, examining the effects of densification at different feedstock moisture levels. Densified wood pellets are promising renewable energy sources, but the impact of densification on thermal characteristics, considering various moisture contents, is underexplored. The main objective is to quantify the thermal characteristics, which involved proximate analysis such as energy pellets’ ash content, fixed carbon, volatile matter, and calorific value. In this research, Malaysian Khaya senegalensis wood was

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Esen, Raşit, and Caner Türüdü. "Variable climate’s effect on wood material’s equilibrium moisture content in Turkey." BioResources 15, no. 4 (2020): 7420–32. http://dx.doi.org/10.15376/biores.15.4.7420-7432.

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Some negative attributes of wood material have numerous practical consequences. The most important of these attributes is that wood, as a hygroscopic material, is dependent on the relative humidity of its environment. The hygroscopic nature of wood material can lead to serious problems when used in doors, windows, and interior or exterior decoration materials. The aim of this study was to evaluate the effect on wood materials equilibrium moisture due to different climates in selected provinces in Turkey. This study examined pine (Pinus sylvestris L.) and oak (Quercus rubra L.) woods, both of w

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15

Duan, Ruifeng, Yuan Wang, Lei Zhao, Xing Da Yun, and Nan Zhou. "Prediction of wood moisture content based on THz time-domain spectroscopy." BioResources 17, no. 3 (2022): 4745–62. http://dx.doi.org/10.15376/biores.17.3.4745-4762.

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A new method for predicting wood moisture content using terahertz (THz) time-domain spectroscopy (TDS) is presented in this paper. The THz wave is a promising method in measuring wood moisture content due to its sensitivity to water, impressive penetration ability in wood, and no destructive effect on wood interior. In this study, the selected wood, Douglas fir (Pseudotsuga menziesii), with different moisture content was studied. THz-TDS was used to extract the optical parameter of the sample. The THz refractive index and absorption coefficient spectrum of the wood were calculated. The first a

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16

Brischke, Christian, and Friedrich L. Wegener. "Impact of Water Holding Capacity and Moisture Content of Soil Substrates on the Moisture Content of Wood in Terrestrial Microcosms." Forests 10, no. 6 (2019): 485. http://dx.doi.org/10.3390/f10060485.

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Terrestrial microcosms (TMCs) are frequently used for testing the durability of wood and wood-based materials, as well as the protective effectiveness of wood preservatives. In contrary to experiments in soil ecology sciences, the experimental setup is usually rather simple. However, for service life prediction of wood exposed in ground, it is of imminent interest to better understand the different parameters defining the boundary conditions in TMCs. This study focused, therefore, on soil–wood–moisture interactions. Terrestrial microcosms were prepared from the same compost substrate with vary

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17

Humar, Miha, Boštjan Lesar, and Davor Kržišnik. "Moisture Performance of Façade Elements Made of Thermally Modified Norway Spruce Wood." Forests 11, no. 3 (2020): 348. http://dx.doi.org/10.3390/f11030348.

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Wooden façades are gaining in importance. Thermally modified wood is becoming one of the preferred materials for claddings. In spite of the fact that façades made of thermally modified wood have been in use for more than two decades, reports about long-term monitoring have been sparse. The results of three-year monitoring of a façade made of thermally modified wood in Ljubljana are reported. Moisture content measurements of thermally modified façades were taken at 22 locations and compared to the moisture content of untreated Norway spruce wood. Temperature and relative humidity were recorded

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18

Cao, Huimin, Xin Gao, Jiabao Chen, Guanglan Xi, Yafang Yin, and Juan Guo. "Changes in Moisture Characteristics of Waterlogged Archaeological Wood Owing to Microbial Degradation." Forests 14, no. 1 (2022): 9. http://dx.doi.org/10.3390/f14010009.

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Studying waterlogged archaeological wood moisture characteristics can provide strong support for the safe dehydration and preservation of waterlogged wooden artifacts. Herein, six waterlogged archaeological wood samples with moisture contents of 154%–968% chosen from two ancient Chinese shipwrecks, Nanhai No.1 and Changjiangkou No.2, and six non-degraded modern wood samples of the relevant corresponding species were selected to study the moisture characteristics by low-temperature nuclear magnetic resonance (NMR) and the dynamic sorption of water vapor (DVS). It was found that the six waterlog

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19

Lev, Jakub, Václav Křepčík, Egidijus Šarauskis, and František Kumhála. "Electrical Capacitance Characteristics of Wood Chips at Low Frequency Ranges: A Cheap Tool for Quality Assessment." Sensors 21, no. 10 (2021): 3494. http://dx.doi.org/10.3390/s21103494.

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Moisture content is one of the most important parameters related to the quality of wood chips that affects both the calorific and economic value of fuel chips. For industrial applications, moisture content needs to be detected quickly. For this purpose, various indirect moisture content measurement methods (e.g., capacitance, NIR, microwave, ECT, X-ray CT, and nuclear MR) have been investigated with different results in the past. Nevertheless, determining wood chip moisture content in real time is still a challenge. The main aim of this article was therefore to analyze the dielectric propertie

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20

Barański, Jacek, Aleksandra Suchta, Sylwia Barańska, Ivan Klement, Tatiana Vilkovská, and Peter Vilkovský. "Wood Moisture-Content Measurement Accuracy of Impregnated and Nonimpregnated Wood." Sensors 21, no. 21 (2021): 7033. http://dx.doi.org/10.3390/s21217033.

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The influence of the impregnation process of pine wood (Pinus sylvestris L.) samples on the electrical resistance changes and the moisture-content measurement accuracy is presented in this paper. In this study, the resistances of impregnated and nonimpregnated green pine timber harvested from northern Poland were compared. An impregnation method based on a vacuum-pressure chamber was used. Copper salts were applied as the impregnated solutions. The obtained results of the electrical resistance comparison showed a dependence of wood resistance on the moisture content. Higher conductivity occurr

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21

Zelinka, Samuel L., Grant T. Kirker, Amy B. Bishell, and Samuel V. Glass. "Effects of Wood Moisture Content and the Level of Acetylation on Brown Rot Decay." Forests 11, no. 3 (2020): 299. http://dx.doi.org/10.3390/f11030299.

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Acetylation is one of the most common types of wood modification and is commercially available throughout the world. Many studies have shown that acetylated wood is decay resistant at high levels of acetylation. Despite its widespread use, the mechanism by which acetylation prevents decay is still not fully understood. It is well known that at a given water activity, acetylation reduces the equilibrium moisture content of the wood cell wall. Furthermore, linear relationships have been found between the acetylation weight percent gain (WPG), wood moisture content, and the amount of mass loss in

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22

Kánnár, Antal. "The Effect of Moisture Content on the Micro-damage Processes of Spruce Wood, Investigated by Acoustic Emission Method and Electron Microscopy." Acta Silvatica et Lignaria Hungarica 2, no. 1 (2006): 93–104. http://dx.doi.org/10.37045/aslh-2006-0008.

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Spruce was investigated by acoustic emission during tensile tests. The examined moisture contents were 0%, 12%, and 26%. The fracture surfaces were photographed using electronmicroscopy. The experiments showed, that micro-damage processes start near the ultimate strength, regardless of moisture content. This indicates the brittle behaviour of wood. The analysis of detected acoustic events at different moisture contents indicated that the number and properties of events supposedly resulting from breaking do not change with increasing moisture content. Decrease occurs in the total number of even

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23

Rosenkilde, A., and P. Glover. "High Resolution Measurement of the Surface Layer Moisture Content during Drying of Wood Using a Novel Magnetic Resonance Imaging Technique." Holzforschung 56, no. 3 (2002): 312–17. http://dx.doi.org/10.1515/hf.2002.050.

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Summary The moisture content profile in the surface layer of Scots pine (Pinus sylvestris) sapwood has been measured using the MRI (Magnetic Resonance Imaging) technique.Anovel high-gradient permanent magnet was used for the measurement of the moisture profile in the wood during the drying process, giving a depth resolution of better than 20 μm. This paper demonstrates for the first time the possibility of measuring the moisture content depth profile in the surface layer from raw state down to 4% moisture content without removing the wood sample from the apparatus. The main advantage of this t

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24

Li, Weiguang, and Zhankuan Zhang. "Tribological Behavior of Microtextured Cemented Carbide in Contact with Wood." Forest Products Journal 68, no. 4 (2018): 465–70. http://dx.doi.org/10.13073/fpj-d-17-00068.

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Abstract We used microtextures to develop a novel antifriction technology for wood cutting tools. Northeast China ash (Fraxinus spp.) was selected as the research species, and the influence of the microtexture on the friction coefficient of cemented carbide samples with and without the texture was studied using various loads and wood moisture content. The results showed that a reasonable microtexture form (d = 40 μm) can effectively reduce the friction coefficient between wood and cemented carbide regardless of the moisture content. The moisture in the wood is conducive to reducing the frictio

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Wei, Xiwen, Liping Sun, Hongjv Zhou, Yang Yang, Yifan Wang, and Yang Gao. "Propagation velocity model of stress waves in larch wood (Larix gmelinii) three-dimensional space with different moisture contents." BioResources 15, no. 3 (2020): 6680–95. http://dx.doi.org/10.15376/biores.15.3.6680-6695.

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Based on the effects of stress wave propagation in larch (Larix gmelinii) wood, the propagation mechanism of stress wave was explored, and a theoretical model of the propagation velocity of stress waves in the three-dimensional space of wood was developed. The cross and longitudinal propagation velocities of stress wave were measured in larch wood under different moisture contents (46% to 87%, 56% to 96%, 20% to 62%, and 11% to 30%) in a laboratory setting. The relationships between the propagation velocity of stress waves and the direction angle or chord angle with different moisture contents

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26

Oberst, Sebastian, Michael Lenz, Joseph C. S. Lai, and Theodore A. Evans. "Termites manipulate moisture content of wood to maximize foraging resources." Biology Letters 15, no. 7 (2019): 20190365. http://dx.doi.org/10.1098/rsbl.2019.0365.

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Animals use cues to find their food, in microhabitats within their physiological tolerances. Termites build and modify their microhabitat, to transform hostile environments into benign ones, which raises questions about the relative importance of cues. Termites are desiccation intolerant and foraging termites are attracted to water, so most research has considered moisture to be a cue. However, termites can also transport water to food, and so moisture may play other roles than previously considered. To examine the role of moisture, we compared Coptotermes acinaciformis termite foraging decisi

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27

Dadkhah-Nikoo, A., and D. J. Bushnell. "Analysis of Wood Combustion Based on the First and Second Laws of Thermodynamics." Journal of Energy Resources Technology 109, no. 3 (1987): 129–41. http://dx.doi.org/10.1115/1.3231338.

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Wood is a highly flexible fuel which can be used in a variety of ways for energy generation. Direct combustion of wood is the oldest method of utilization of this renewable energy source. This paper presents an analysis of wood combustion based on the first and second laws of thermodynamics, using a computer program developed for this study. Since the moisture content of the available wood fuels vary over a wide range, special attention is given to the effects of moisture content on the exergy and energy content of the wood. Because of the wide variation in particle size and moisture content o

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28

Havířová, Zdeňka, and Pavel Kubů. "Equilibrium moisture content of wood at different temperature/moisture conditions in the cladding of wooden constructions and in the relation to their reliability and service life." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 58, no. 2 (2010): 119–32. http://dx.doi.org/10.11118/actaun201058020119.

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One of the natural properties of wood and wood-based materials is their soaking capacity (hygroscopicity). The moisture content of wood and building constructions of wood and wood based materials significantly influences the service life and reliability of these constructions and buildings. The equilibrium weight moisture content of built-in wood corresponding to temperature/moisture conditions inside the cladding has therefore a decisive influence on the basic requirements placed on building constructions. The wood in wooden frame cladding changes its moisture content depending on temper

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Kosiński, Piotr. "Moisture Transport in Loose Fibrous Insulations under Steady-State Boundary Conditions." Materials 16, no. 24 (2023): 7656. http://dx.doi.org/10.3390/ma16247656.

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This research aimed to compare the transport capacity of loose-fill mineral wool, cellulose fibers, and wood wool to transfer moisture under steady-state conditions. The tests were carried out in the heat flow meter apparatus, which created a constant thermal field, limiting samples of sorptive moistened materials. The thermal conductivity, stabilization time, and moisture content of the samples were measured. Based on the variation in the results, the dynamism of moisture transport in the materials was determined. Mineral wool samples showed the lowest sorption. As a result, the moisture tran

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Chernov, V. Yu, M. S. Chernova, A. N. Nosova, and V. V. Demakova. "ACCURACY ANALYSIS OF NON-DESTRUCTIVE MEASUREMENT METHODS IN CONTROL OFFROZEN WOOD MOISTURE CONTENT." Kontrol'. Diagnostika, no. 320 (February 2025): 45–52. https://doi.org/10.14489/td.2025.02.pp.045-052.

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The work is devoted to measuring the accuracy of wood moisture content measurement by conductometric and inductive (non-contact) additional non-destructive methods, as well as their comparison with the standard drying-weight method. The novelty and practical significance of the results are associated with studies of the accuracy of methods in measuring frozen wood. The work defines random components of error and the total error of measuring wood moisture content at normal temperature and in a frozen state by non-destructive measurement methods. It is equal to 3 %. Relative error of measurement

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31

Nejad, Mojgan, Mahdi Dadbin, and Paul Cooper. "Coating Performance on Exterior Oil-Heat Treated Wood." Coatings 9, no. 4 (2019): 225. http://dx.doi.org/10.3390/coatings9040225.

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Thermal modification and the degree of improved properties from the treatment depend on wood species and treatment parameters. Southern yellow pine and spruce are two wood species commonly used for decking, fences, and siding in North America. This study evaluated coating performance when applied on oil-heat-treated Southern pine and spruce wood samples. Moisture content, color, and gloss changes of samples were analyzed before weathering and then after each month for the first three months and then every six months during 18 months of natural weathering exposure in Toronto, Canada. The result

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32

Fredriksson, Maria, Lars Wadsö, and Peter Johansson. "Small resistive wood moisture sensors: a method for moisture content determination in wood structures." European Journal of Wood and Wood Products 71, no. 4 (2013): 515–24. http://dx.doi.org/10.1007/s00107-013-0709-0.

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Zanuncio, Antônio José Vinha, Amélia Guimarães Carvalho, Liniker Fernandes da Silva, Angélica de Cássia Oliveira Carneiro, and Jorge Luiz Colodette. "ARTIFICIAL NEURAL NETWORKS AS A NEW TOOL FOR ASSESSING AND MONITORING WOOD MOISTURE CONTENT." Revista Árvore 40, no. 3 (2016): 543–49. http://dx.doi.org/10.1590/0100-67622016000300018.

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ABSTRACT Drying of wood is necessary for its use and moisture control is important during this process. The aim of this study was to use artificial neural networks to evaluate and monitor the wood moisture content during drying. Wood samples of 2 × 2 × 4 cm were taken at 1.3 m above the ground, outside of radial direction, from seven 2-year-old materials and three 7-year-old materials. These samples were saturated and drying was evaluated until the equilibrium moisture content, then, the artificial neural networks were created. The materials with higher initial moisture reached equilibrium moi

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34

王, 秘. "Neural Network Model for Wood Moisture Content." Advances in Applied Mathematics 07, no. 02 (2018): 216–23. http://dx.doi.org/10.12677/aam.2018.72026.

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35

LÖNNBERG, BRUNO. "DEVELOPMENT OF WOOD GRINDING. 3. FURTHER TESTING OF GRINDING MODELS." Cellulose Chemistry and Technology 55, no. 7-8 (2021): 795–97. http://dx.doi.org/10.35812/cellulosechemtechnol.2021.55.66.

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"The study is the continuation of a sequence of works devoted to describing the mechanisms occurring during stone grinding of wood. This part was aimed at further testing of pressurised grinding of spruce wood, which was conducted under controlled laboratory conditions. Testing of the developed theoretical model for power ratio (Pc/Pt) versus energy specific production (Ġw/Pt) produced linears for data representing constant wood moisture content. However, the linears showed almost identical results for fresh woods, and also for drier wood, e.g. wood containing saturated fibres and air-dried wo

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36

Fu, Zongying, Hui Wang, Jingpeng Li, and Yun Lu. "Determination of Moisture Content and Shrinkage Strain during Wood Water Loss with Electrochemical Method." Polymers 14, no. 4 (2022): 778. http://dx.doi.org/10.3390/polym14040778.

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Moisture content and shrinkage strain are essential parameters during the wood drying process. The accurate detection of these parameters has very important significance for controlling the drying process and minimizing drying defects. The presented study describes an electrochemical method to determine wood moisture content and shrinkage strain during drying, and the accuracy of this method is also evaluated. According to the results, the electrical resistance of the samples increased with the decrease in wood moisture content. As the moisture content changed from 42% to 12%, the resistance i

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37

Merenda, Lukáš, and Květoslav Nikl. "Influence of microwave plasticization, high temperature treatment and areal compression on modulus of elasticity and bending strength perpendicular to the gain in radial direction at Spruce (Picea abies (L.) Karst.)." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 57, no. 5 (2009): 205–12. http://dx.doi.org/10.11118/actaun200957050205.

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Nowadays wood modification is very-discussed and its importance is growing up. Wood plasticization alias a temporary change of wood properties makes subsequent processing possible. Plasticization is very suitable for subsequent mechanical compressing of wood. Instead steaming and boiling there is a microwave heating for wood plasticization. This kind of heating cuts down the time of plasticization from hours to seconds and also reduces energy consumption.Pressing of wood perpendicular to the gain in radial direction causes change of wood structure, increases wood density and due to this the wo

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38

Batista, Djeison Cesar, Adriano Ribeiro Mendonça, and Adair José Regazzi. "Use of a resistive moisture meter to estimate the moisture content of untreated and thermally modified Tectona grandis L.f. juvenile wood." BioResources 14, no. 3 (2019): 5171–87. http://dx.doi.org/10.15376/biores.14.3.5171-5187.

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The effects of the TanWood thermal modification process on the resistive properties of Tectona grandis juvenile wood were verified, and the best setting for the use of a resistive moisture meter was determined for both untreated and thermally modified wood (TMW). Sixteen treatments were assessed for both untreated and TMW according to three factors: moisture meter scale (four levels), electrode length (two levels), and grain direction (two levels). Moisture content was measured in four steps with equilibrium moisture contents of 6.0%, 8.6%, 12.2%, and 15.6%. For statistical analysis, the oven-

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Majka, Jerzy, Tomasz Rogoziński, and Wiesław Olek. "Sorption and diffusion properties of untreated and thermally modified beech wood dust." Wood Science and Technology 56, no. 1 (2021): 7–23. http://dx.doi.org/10.1007/s00226-021-01346-x.

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AbstractDynamic water vapor sorption experiments were carried out using beech wood dust (from untreated and thermally modified wood) of two-particle sizes, (< 25 and 80–250 µm), obtained from abrasive sanding. Sorption isotherms were parameterized with the GAB and GDW models. Dust from thermally modified wood had significantly lower equilibrium moisture content compared to dust from untreated material, due to the reduction in primary sorption sites in treated material. The observed changes were quantified by the coefficients of the GAB and GDW models. Thermal modification and size of wood d

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Janowiak, John J., Karolina S. Szymona, Manoj K. Dubey, Ron Mack, and Kelli Hoover. "Improved Radio-Frequency Heating through Application of Wool Insulation during Phytosanitary Treatment of Wood Packaging Material of Low Moisture Content." Forest Products Journal 72, no. 2 (2022): 98–104. http://dx.doi.org/10.13073/fpj-d-22-00009.

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Abstract The International Standard of Phytosanitary Measures No. 15 (ISPM-15) requires signatory countries of the International Plant Protection Convention to use approved treatment methods on wood packaging materials used in international trade to significantly reduce the risk of spreading alien species. One of the approved methods utilizes dielectric heating (DH) to raise the temperature in the wood to 60°C through the profile of the workload for 1 minute to eradicate pests. To improve the uniform distribution of heat within a wood workload using radio frequency, a form of DH, we tested the

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Forsman, Karin, Maria Fredriksson, Erik Serrano, and Henrik Danielsson. "Moisture-dependency of the fracture energy of wood: a comparison of unmodified and acetylated Scots pine and birch." Holzforschung 75, no. 8 (2021): 731–41. http://dx.doi.org/10.1515/hf-2020-0174.

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Abstract The moisture-dependency of the fracture energy for unmodified and acetylated Scots pine (Pinus sylvestris L.) and birch (Betula pendula Roth) has been investigated. Specimens were conditioned at relative humidity levels of 20, 75, and 97%, as well as dry and water-saturated. At moisture contents below 15%, the fracture energy increased with increasing moisture content for both unmodified and acetylated wood, while it decreased for untreated wood at higher moisture contents. A significant difference in moisture-dependency was found, indicating higher fracture energy for unmodified wood

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LÖNNBERG, BRUNO. "DEVELOPMENT OF WOOD GRINDING 4. EVALUATION OF THE THEORETICAL GRINDING MODEL." Cellulose Chemistry and Technology 56, no. 5-6 (2022): 615–18. http://dx.doi.org/10.35812/cellulosechemtechnol.2022.56.53.

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"Spruce wood was ground under certain fixed conditions to achieve data for interpretation of the grinding mechanism. For this purpose, wood moisture content, wood feeding rate and grindstone peripheral speed were given five, three and two different levels, respectively. The data obtained by application of a laboratory grinder were accordingly most reliable, because the grinder was run under well controlled conditions, and the wood samples represented one and the same wood quality, but at five moisture content levels. The grinding zone temperature was measured at the outlet from the grinding zo

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Almeida, Tiago H., Diego H. Almeida, Vinicius B. M. Aquino, et al. "Investigation of the fiber saturation point of tropical Brazilian wood species." BioResources 15, no. 3 (2020): 5379–87. http://dx.doi.org/10.15376/biores.15.3.5379-5387.

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The fiber saturation point (FSP) is an important parameter of wood material, related to dimensional stability and variations of mechanical performance. This paper investigated the FSP values of 15 tropical Brazilian wood species covering all strength classes of the Brazilian standard code. An additional goal was to estimate FSP value based on the wood’s apparent density. The FSP values were determined by measuring the wood specimen dimensions during moisture content reduction from the saturated state. Wood densities at 0% and 12% moisture contents and basic density were determined according to

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Conde-García, M., M. Conde-García, J. A. Tenorio-Ríos, and J. Fernández-Golfín. "Experimental evaluation of the effect of different design conditions on the risk of decay in solid wood exposed to outdoor climate." Materiales de Construcción 71, no. 342 (2021): e247. http://dx.doi.org/10.3989/mc.2021.12220.

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Wood decay have the greatest impact on in-service wood structural elements. In most cases, decay is associated with excessive accumulation of moisture in the wood. The structural design conditions have an effect on the wood moisture content and this affects the service life of the material. In this study, which involved an experimental trial specifically designed to embrace different structural design conditions, the moisture content evolution in different places affected by different design conditions was evaluated over a period of three years in Madrid (Spain). The effect of protection by ea

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Tian, Panpan, Hongxing Qiu, Jianhong Han, Hongmin Li, and Xia Han. "Prediction Model of Shrinkage Crack Propagation in Cross-Section of Timber Components." Buildings 13, no. 10 (2023): 2505. http://dx.doi.org/10.3390/buildings13102505.

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Shrinkage cracks severely affect the safety of wood structures. Therefore, the moisture stress distribution of shrinkage cracks should be analyzed, and the interface crack depth of wood components predicted. In this paper, the equilibrium conditions, physical conditions, geometric conditions, and coordination equations of the disk humidity stress under a moisture content gradient Δw are deduced by referring to the elastic analytical solution model of temperature stress. Moreover, the humidity stress distribution equation is established, which is verified via the finite element method. The crit

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Alsaadi, Sinan Saeed Jasim, Atalya Kocakusak, and Selcuk Helhel. "THE EFFECT OF MOISTURE CONTENT ON ELECTRICAL PROPERTIES OF SELECTED SOFTWOODS; CEDAR, JUNIPER, AND PINE." Journal of Engineering and Sustainable Development 28, no. 1 (2024): 35–54. http://dx.doi.org/10.31272/jeasd.28.1.3.

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Natural woods as a raw material have been taking a considerable interest topic by industries such as the forest industry, furniture manufacturing, and nowadays suitable electronics. One of the most essential steps of manufacturing for those industry purposes is RF heating/drying of raw wood material nowadays. However, knowing the electrical properties, such as the dielectric constant of wood-based material before processing is tremendously important. It is well-known that the moisture content and density levels of material directly affect the dielectric properties. Moisture and density conditi

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Zhu, Yuehua, Yaoli Zhang, and Biao Pan. "Thermal conductivity and deformation of Taxodium hybrid ‘Zhongshanshan’ during heat transfer process." BioResources 15, no. 2 (2020): 2645–55. http://dx.doi.org/10.15376/biores.15.2.2645-2655.

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The thermal conductivity and the deformation of wood from the Taxodium hybrid ‘Zhongshanshan’ were studied in the process of heat transfer. The results showed that the average thermal conductivity of this wood was 0.1257 W/(m·K) under the condition of 12% wood moisture content and 30 °C heat transfer temperature. When the testing temperature exceeded 0 °C, the thermal conductivity increased linearly with both temperature and wood moisture content and was affected by the moisture content of the wood. During the heat transfer process, the deformation of features caused repeated swelling and shri

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Feklistov, P. A., A. V. Gryazkin, I. N. Bolotov, and O. N. Tyukavina. "Moisture distribution over tree trunk cross-section in bilberry spruce forests." FORESTRY BULLETIN 25, no. 2 (2021): 35–40. http://dx.doi.org/10.18698/2542-1468-2021-2-35-40.

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The article considers the change in the moisture content in the wood along the cross-section of spruce trunks, it also analyzes the influence of the trees age and the diameter of the trunk on the wood moisture content. The research was carried out in the Arkhangelsk Forestry in the bilberry spruce forests of different age classes (from IV to VIII). 10 trial plots were laid in clear stands or with a small mixture of birch and pine. To study the moisture content of spruce trunks, 15 sample trees (150 in total) were selected for each trial plot. The wood moisture content was determined on cores s

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Suchomelová, Pavlína, Miroslav Trcala, and Jan Tippner. "Numerical simulations of coupled moisture and heat transfer in wood during kiln drying: Influence of material nonlinearity." BioResources 14, no. 4 (2019): 9786–805. http://dx.doi.org/10.15376/biores.14.4.9786-9805.

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Finite element simulations of coupled thermal and moisture fields in wood during kiln drying were observed with a focus on non-isothermal moisture transfer in three dimensional orthotropic models of wood with an initial moisture content below the fiber saturation point. Four different unsteady-state numerical models of the drying process were compared with the assumptions given by standards commonly used in wood kiln-drying processes. The first model describes linear simulation, and the other three models present nonlinear simulation using variable material coefficients dependent on temperatur

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Roman, Kamil, Emilia Grzegorzewska, Mateusz Leszczyński, et al. "Effect of Seawater with Average Salinity on the Moisture Content, Ash Content and Tensile Strength of Some Coniferous Wood." Materials 16, no. 8 (2023): 2984. http://dx.doi.org/10.3390/ma16082984.

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In this paper, the differences in mechanical strength tested during the static tensile and compression test of Scots pine (Pinus sylvestris L.), European larch (Larix decidua) and Norway spruce (Picea abies) wood exposed to continuous soaking in water with a salinity of 7‰ were determined. The value of salinity corresponded to the average salinity on the Polish Baltic coast. This paper also aimed to examine the content of mineral compounds absorbed during four cycles of two weeks each. The essence of the statistical research was to identify the effect of the mineral range compounds and salts d

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