Maderas-Ciencia Y Tecnologia最新文献

Gluing characteristics of Papua New Guinea timber species for various non-structural applications 巴布亚新几内亚各种非结构用途木材的胶合特性

4区农林科学

Maderas-Ciencia Y Tecnologia Pub Date : 2023-11-02 DOI: 10.22320/s0718221x/2024.10

Benoit Belleville, Kilva Lancelot, Elaine Galore, Johannes Fehrmann, Barbara Ozarska

{"title":"Gluing characteristics of Papua New Guinea timber species for various non-structural applications","authors":"Benoit Belleville, Kilva Lancelot, Elaine Galore, Johannes Fehrmann, Barbara Ozarska","doi":"10.22320/s0718221x/2024.10","DOIUrl":"https://doi.org/10.22320/s0718221x/2024.10","url":null,"abstract":"Papua New Guinea (PNG) has abundant natural forest resources but there are many constraints which need to be addressed to support the development of competitive value-added wood industries. There is a need to develop knowledge and capacity in wood science and processing technologies which support successful domestic value-adding wood processing enterprises. A comprehensive testing program has been developed to assess the glue‐bond strength and performance of selected commercial PNG timber species in various climatic conditions to simulate service conditions in potential market destinations. Two criteria namely shear strength and wood failure have been used to determine if a species can meet the minimum requirements for either dry use or wet use applications. The performance of 24 different PNG commercial timber species has been assessed using a one-component cross-linking polyvinyl acetate emulsion adhesive. The bondability of the selected species has been carefully estimated considering the wood density and wood moisture content for the strength and durability in dry- and wet-use conditions. The testing results show that as the wood density as a wood property factor and moisture content as a service condition factor increase, high shear strength with high wood failure become more difficult to achieve consistently. The highest shear strength and wood failure results were achieved by softwood plantation species and low-density hardwood species. Based on the testing results, the selected species have been classified into bondability classes (bond very well, bond well, bond with difficulty, very difficult to bond).","PeriodicalId":49055,"journal":{"name":"Maderas-Ciencia Y Tecnologia","volume":"19 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135933096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance of visible and Near-infrared spectroscopy to predict the energetic properties of wood 用可见和近红外光谱法预测木材的能量特性

4区农林科学

Maderas-Ciencia Y Tecnologia Pub Date : 2023-11-02 DOI: 10.22320/s0718221x/2024.11

Franciele Gmach, Letícia Jacobowski, Eraldo Antonio Bonfatti Júnior, Elaine Cristina Lengoeski, Rudson Silva Oliveira, Dimas Agostinho Silva, Silvana Nisgoski, Lívia Viana, Diego Martins Stangerlin

{"title":"Performance of visible and Near-infrared spectroscopy to predict the energetic properties of wood","authors":"Franciele Gmach, Letícia Jacobowski, Eraldo Antonio Bonfatti Júnior, Elaine Cristina Lengoeski, Rudson Silva Oliveira, Dimas Agostinho Silva, Silvana Nisgoski, Lívia Viana, Diego Martins Stangerlin","doi":"10.22320/s0718221x/2024.11","DOIUrl":"https://doi.org/10.22320/s0718221x/2024.11","url":null,"abstract":"Wood can be used for fuel by direct burning, or as a raw material for other fuels; however, it is necessary to evaluate the energy properties to ensure the optimal use of this material. The most relevant characteristics to be analyzed are the higher heating value, volatile material content, fixed carbon content, and ash content. Along with the traditional methods, there are also non-destructive evaluations that are optimized for speed and reliability. Among these methods, visible spectroscopy and near-infrared spectroscopy have been proven to be robust for the prediction of several wood properties. The aim of this study was to evaluate the potential of visible spectroscopy and near-infrared spectroscopy for species discrimination and prediction of higher heating value, volatile material content, fixed carbon content, and ash content for Eucalyptus saligna, Eucalyptus dunnii, and Eucalyptus benthamii woods. For this purpose, multivariate principal component analysis and partial least squares regression were applied to the collected spectra. The principal component analysis satisfactorily discriminated the three species, explaining 99% of the variance of the visible spectroscopy spectra and 73% of that of the near-infrared spectra. The estimation of energetic properties through partial least squares regression was satisfactory for both visible spectroscopy and near-infrared spectroscopies, which presented calibration R² values close to 1 and low errors for all properties studied.","PeriodicalId":49055,"journal":{"name":"Maderas-Ciencia Y Tecnologia","volume":"105 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135933441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fotogrametría SfM de bajo costo para monitorización de ensayos sobre estructuras laminares reticulares de madera deformadas elásticamente a escala real 低成本SfM摄影测量用于监测真实尺度弹性变形木材网状层状结构的试验

4区农林科学

Maderas-Ciencia Y Tecnologia Pub Date : 2023-10-25 DOI: 10.22320/s0718221x/2024.08

Juan Ortiz-Sanz, Mariluz Gil-Docampo, Guillermo Bastos, Antonio José Lara-Bocanegra

{"title":"Fotogrametría SfM de bajo costo para monitorización de ensayos sobre estructuras laminares reticulares de madera deformadas elásticamente a escala real","authors":"Juan Ortiz-Sanz, Mariluz Gil-Docampo, Guillermo Bastos, Antonio José Lara-Bocanegra","doi":"10.22320/s0718221x/2024.08","DOIUrl":"https://doi.org/10.22320/s0718221x/2024.08","url":null,"abstract":"Para validar modelos numéricos de resistencia de estructuras, es necesario medir su deformación bajo carga. La dificultad de dicha medición aumenta con su tamaño y su complejidad. En el presente estudio se determina la geometría de una estructura laminar reticular de gran tamaño tras una prueba de carga. La estructura fue cargada en sus cinco nodos centrales con un peso suspendido de 105 kg por nodo. Se generó el modelo 3D de la estructura sin carga y bajo carga, empleando fotogrametría usando software PhotoModeler Scanner y Metashape. El error máximo en la medida de las distancias sobre la escena fue 1,31 mm, que corresponde al 0,17 % respecto a la diagonal de la base de la estructura. El mayor error medio se dio bajo carga máxima, 0,70 mm de acuerdo a Metashapee y 0,44 mm en PhotoModeler Scanner. El perfil de la estructura bajo carga es coherente con la deformación prevista. La calidad de medida del modelo 3D resultó ser altamente uniforme. Este estudio releva el uso de fotos que han sido tomadas varios años después, a través de la fotogrametría utilizando softwares avanzados.","PeriodicalId":49055,"journal":{"name":"Maderas-Ciencia Y Tecnologia","volume":"18 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135215937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Acknowledgment of Referees Maderas-Cienc Tecnol 2022-2023 马德拉斯科学技术学院2022-2023

4区农林科学

Maderas-Ciencia Y Tecnologia Pub Date : 2023-10-05 DOI: 10.22320/s0718221x/2023.41

Ruben Ananias-Abuter

引用次数: 0

Influence of thermal pretreatments on dimensional change and humidity sensitivity of densified spruce and poplar wood 热处理对密实云杉和杨木尺寸变化和湿度敏感性的影响

4区农林科学

Maderas-Ciencia Y Tecnologia Pub Date : 2023-09-04 DOI: 10.22320/s0718221x/2024.09

Huseyin Pelit, Ramazan Yorulmaz

{"title":"Influence of thermal pretreatments on dimensional change and humidity sensitivity of densified spruce and poplar wood","authors":"Huseyin Pelit, Ramazan Yorulmaz","doi":"10.22320/s0718221x/2024.09","DOIUrl":"https://doi.org/10.22320/s0718221x/2024.09","url":null,"abstract":"The effect of thermal pretreatments on the dimensional change and humidity sensitivity of densified spruce (Picea orientalis) and poplar (Populus nigra) wood were investigated. A thermal pretreatment was applied on the wood specimens at 140 °C, 160 °C, 180 °C, and 200 °C for 7 h and 9 h. Wood specimens were then compressed at ratios of 20 % and 40 % at a temperature of 150 °C. The results showed that spring-back and thickness swelling increased in all specimens (thermally pre-treated and untreated) depending on the increase in compression ratio. However, set-recovery was determined higher at 20 % compression ratio. The equilibrium moisture content values of untreated specimens and thermally pre-treated specimens at low temperatures (140 ºC and 160 ºC) were found lower than uncompressed specimens. The impact of compression ratio on equilibrium moisture content was not clear. Thermal pretreatments significantly affected the dimensional stability and hygroscopicity of densified specimens (especially poplar wood). Depending on the increase in thermal pretreatment temperature and duration, spring-back, set-recovery and thickness swelling in wood specimens decreased up to 31 %, 67 % and 62 %, respectively. In addition, equilibrium moisture content and water absorption decreased with the increase in thermal pretreatment temperature and duration. Moreover, the thermal treatment temperature was more important than duration on the investigated properties.","PeriodicalId":49055,"journal":{"name":"Maderas-Ciencia Y Tecnologia","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135498899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thinning wood properties of Nothofagus alpina under three different silvicultural conditions 三种不同造林条件下高山木疏材特性的研究

4区农林科学

Maderas-Ciencia Y Tecnologia Pub Date : 2023-08-25 DOI: 10.22320/s0718221x/2024.07

Maximilian Wentzel, Héctor Pesenti, Fernando Droppelmann, Aldo Rolleri

引用次数: 0

Using acoustic testing to estimate strength and stiffness of wood-polymer composites 用声学测试估计木聚合物复合材料的强度和刚度

4区农林科学

Maderas-Ciencia Y Tecnologia Pub Date : 2023-08-21 DOI: 10.22320/s0718221x/2024.04

Éverton Hillig, Ignacio Bobadilla, Francisco Arriaga, Guillermo Íñiguez-González

{"title":"Using acoustic testing to estimate strength and stiffness of wood-polymer composites","authors":"Éverton Hillig, Ignacio Bobadilla, Francisco Arriaga, Guillermo Íñiguez-González","doi":"10.22320/s0718221x/2024.04","DOIUrl":"https://doi.org/10.22320/s0718221x/2024.04","url":null,"abstract":"This study used non-destructive testing with ultrasonic and stress wave propagation to evaluate bending strength and stiffness of wood-polymer composites. Twelve composite plate products were produced with different formulations of polymer matrix (high- and low-density polyethylene and polypropylene) and type and proportion of flour (coconut shell and wood). Mechanical and acoustic properties were influenced primarily by the type of matrix used in the composite. The greater the proportion of wood and coconut shell flour the higher the wave propagation velocity, stiffness, and strength. We found a correlation between mechanical properties (strength and stiffness) and wave velocity and stiffness coefficient. We also present linear regression equations of the stiffness and strength of the specimen as a function of wave velocity and stiffness coefficient obtained through non-destructive testing. For polypropylene and high-density polyethylene matrix composites, the stiffness coefficient provided a better estimate of stiffness, while for low-density polyethylene the wave velocity provided better results.","PeriodicalId":49055,"journal":{"name":"Maderas-Ciencia Y Tecnologia","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135877184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quality of tectona grandis for sawn wood production 锯材生产用大木片的质量

4区农林科学

Maderas-Ciencia Y Tecnologia Pub Date : 2023-08-14 DOI: 10.22320/s0718221x/2024.06

Theonizi Angélica Silva-Albuês, Bárbara Luísa Corradi-Pereira, Amélia Guimarães-Carvalho, Aylson Costa-Oliveira

{"title":"Quality of tectona grandis for sawn wood production","authors":"Theonizi Angélica Silva-Albuês, Bárbara Luísa Corradi-Pereira, Amélia Guimarães-Carvalho, Aylson Costa-Oliveira","doi":"10.22320/s0718221x/2024.06","DOIUrl":"https://doi.org/10.22320/s0718221x/2024.06","url":null,"abstract":"Forestry companies have invested in genetic improvement to increase wood production in a shorter amount of time. Thus, studies are needed to compare the properties of clonal and seminal wood materials. The objective of this study was to analyze physical and mechanical properties of Tectona grandis from clonal (C1 and C2) and seminal (S) origin and evaluate the yield and quality of sawn wood subjected to outdoor and oven drying. Genetic material was collected from six, 15-year-old trees. Clone C2 presented the lowest amount of bark, and 51 % heartwood up to half the commercial height, while the heartwood of C1 and S went up to 25 % of the height. The three materials did not differ statistically for maximum angular deviation, pith eccentricity, basic density, Janka hardness, anisotropy, commercial income of sawn wood and the presence of knots. After the drying processes, the bowing and crooking indexes were less than 5 mm.m-1, however, the seminal material showed a higher cracking incidence after outdoor and oven drying. In conclusion, the wood properties of the three materials are similar. In addition, the oven drying process is recommended.","PeriodicalId":49055,"journal":{"name":"Maderas-Ciencia Y Tecnologia","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135308112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

El bambú Tonkin (Pseudosasa amabilis) como material a explorar en el Ecodiseño. El diseño de un puesto de mercado como caso de estudio 东京竹子(Pseudosasa amabilis)作为生态设计中探索的材料。市场摊位的设计作为一个案例研究

4区农林科学

Maderas-Ciencia Y Tecnologia Pub Date : 2023-08-08 DOI: 10.22320/s0718221x/2024.05

Óscar González-Yebra, Adrián Lozano Rey, Alfredo Tolón Becerra, Caori Patricia Takeuchi

{"title":"El bambú Tonkin (Pseudosasa amabilis) como material a explorar en el Ecodiseño. El diseño de un puesto de mercado como caso de estudio","authors":"Óscar González-Yebra, Adrián Lozano Rey, Alfredo Tolón Becerra, Caori Patricia Takeuchi","doi":"10.22320/s0718221x/2024.05","DOIUrl":"https://doi.org/10.22320/s0718221x/2024.05","url":null,"abstract":"El análisis del ciclo de vida (ACV) permite evaluar el impacto ambiental en las diferentes etapas de un diseño/producto. En el caso de la etapa de selección de materiales, entre las materias primas que tienen un mayor impacto ambiental y alto consumo energético se encuentra el acero. En este contexto, en esta investigación se estudia el uso del bambú Tonkin (Pseudosasa amabilis) como material estructural y estrategia de Ecodiseño, se compara su impacto medioambiental con el del acero en un rediseño de un puesto de mercado para frutas y verduras. Para llevar a cabo el proceso de diseño, se ha trabajado bajo el enfoque de Diseño para la Sostenibilidad (D4S) con la herramienta SolidWorks®, en la que se ha desarrollado el diseño de detalle, incluyendo el estudio del comportamiento estático y ACV, es decir, el estudio de la sostenibilidad de la estructura en el marco del nuevo paradigma de la Economía Circular. Se realizó el rediseño con bambú Tonkin, a partir de un muestreo que arrojó unos datos medios de 30 mm de diámetro y espesor de 6 mm. Los resultados obtenidos, de forma teórico-experimental y con la simulación númerica, confirman el bambú Tonkin tanto en el análisis de elementos finitos (FEA) como en el estudio de sostenibilidad (ACV), es un material con unas excelentes cualidades estructurales a la vez que tiene un impacto medioambiental mínimo. Es por ello, que se proponen nuevas líneas de trabajo y se invita a otros grupos de investigación a que se interesen sobre este material verde desconocido.","PeriodicalId":49055,"journal":{"name":"Maderas-Ciencia Y Tecnologia","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135840221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Physical, mechanical, and thermal characteristics of alkaline copper quaternary impregnated oriental beech wood 碱性铜季浸渍东方山毛榉木的物理、机械和热特性

4区农林科学

Maderas-Ciencia Y Tecnologia Pub Date : 2023-08-08 DOI: 10.22320/s0718221x/2024.03

Çağlar Altay, Emir Özdemir, Ergün Baysal, Mehmet Emin Ergün, Hilmi Toker

{"title":"Physical, mechanical, and thermal characteristics of alkaline copper quaternary impregnated oriental beech wood","authors":"Çağlar Altay, Emir Özdemir, Ergün Baysal, Mehmet Emin Ergün, Hilmi Toker","doi":"10.22320/s0718221x/2024.03","DOIUrl":"https://doi.org/10.22320/s0718221x/2024.03","url":null,"abstract":"The physical, mechanical, and thermal properties of Oriental beech (Fagus orientalis), which had been impregnated with the water-based, copper-containing Korasit KS material from the Alkaline Copper Quaternary group, were investigated in this study. According to ASTM 1413-07el (2007) standard, the wood samples used in the investigation were impregnated with 3 % and 6 % aqueous solutions of Korasit KS. The modulus of rupture, thermal, and water absorption tests were performed on samples of Oriental beech after they had been impregnated. Oriental beech's modulus of rupture values decreased as a result of Korasit KS impregnation. Additionally, Oriental beech had lower modulus of rupture values at greater concentrations of Korasit KS. In every water absorption period, the water absorption values of the Oriental beech impregnated with Korasit KS were higher than those of the control group. Our results showed that Korasit KS impregnation enhanced thermal properties of Oriental beech. Moreover, higher concentration levels of Oriental beech yielded better thermal characteristics of Oriental beech.","PeriodicalId":49055,"journal":{"name":"Maderas-Ciencia Y Tecnologia","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135840896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0