Maderas. Ciencia y tecnología

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List of Papers (Total 3,716)

Mechanical characterization of visually graded boards from turkish fir and black pine by nondestructive and destructive tests

For the mechanical characterization of Turkish fir and black pine, 400 board specimens with 22 mm× 50 mm × 420 mm were visually graded according to TS 1265 standard. Nondestructive tests were here upon performed using the stress wave method. After specimens were intentionally tested under flatwise bending to research the applicability as an alternative to tension and edgewise...

Performance of visible and Near-infrared spectroscopy to predict the energetic properties of wood

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...

Fotogrametría SfM de bajo costo para monitorización de ensayos sobre estructuras laminares reticulares de madera deformadas elásticamente a escala real

Numerical models of the resistance of structures must be validated through the measurement of their deformation under load, which is made difficult by size and complexity. In the present study, the geometry of a large reticular laminar structure is determined after a load test. The structure was loaded at its five central nodes with a suspended weight of 105 kg per node. The 3D...

El bambú Tonkin (Pseudosasa amabilis) como material a explorar en el Ecodiseño. El diseño de un puesto de mercado como caso de estudio

The life cycle analysis (LCA) allows to evaluate the environmental impact in the different stages of a design/product. In the case of the material selection stage, among the raw materials that has a high environmental impact and energy consumption is the steel. In this context, this research studies the use of Pseudosasa amabilis (Tonkin bamboo) as a structural material and an...

Comportamiento mecánico de muros de corte de Eucalyptus grandis: Resultados experimentales versus el criterio de las normas europeas

This paper presents and discusses the results of a project aimed at investigating the mechanical behaviour of typical shear walls of light frame constructions and built with frame of Argentinean Eucalyptus grandis (eucalipto). The research was carried out on 17 panels, 15 of which distributed in 5 series with different configurations that met the construction requirements...

Fotogrametría SfM de bajo costo para monitorización de ensayos sobre estructuras laminares reticulares de madera deformadas elásticamente a escala real

Numerical models of the resistance of structures must be validated through the measurement of their deformation under load, which is made difficult by size and complexity. In the present study, the geometry of a large reticular laminar structure is determined after a load test. The structure was loaded at its five central nodes with a suspended weight of 105 kg per node. The 3D...

Thinning wood properties of Nothofagus alpina under three different silvicultural conditions

The main objective of this study was to assess the properties of Nothofagus alpina (raulí) wood from thinning that originates from two sites with intensive silviculture and one similar to a secondary growth forest, with different soil, climatic conditions and age. To achieve this, some mechanical, physical and chemical-crystalline properties were characterized; studying the...

Quality of Tectona grandis for sawn wood production

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 (teca) from clonal (C1 and C2) and seminal (S) origin and evaluate the yield and...

El bambú Tonkin (Pseudosasa amabilis) como material a explorar en el Ecodiseño. El diseño de un puesto de mercado como caso de estudio

The life cycle analysis (LCA) allows to evaluate the environmental impact in the different stages of a design/product. In the case of the material selection stage, among the raw materials that has a high environmental impact and energy consumption is the steel. In this context, this research studies the use of Pseudosasa amabilis (Tonkin bamboo) as a structural material and an...

Using acoustic testing to estimate strength and stiffness of wood-polymer composites

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...

Physical, mechanical, and thermal characteristics of alkaline copper quaternary impregnated Oriental beech wood

The physical, mechanical, and thermal properties of Oriental beech (Fagus orientalis L.), which had been impregnated with the water-based, copper-containing Korasit KS material from the Alkaline Copper Quaternary group, were investigated in this study. The wood samples used in the investigation were impregnated with 3 % and 6 % aqueous solutions of Korasit KS. The modulus of...

Cross laminated timber bonding quality for different Brazilian species and pressing levels

The proper choice of raw materials and manufacturing parameters for Cross Laminated Timber is essential to promote the proper bonding of the lamellas, aiming at their application in construction. However, few Brazilian species are currently used in the production of Cross Laminated Timber. The aim of this work was to characterize the bonding quality of four Brazilian...

Comportamiento mecánico de muros de corte de Eucalyptus grandis: Resultados experimentales versus el criterio de las normas europeas

This paper presents and discusses the results of a project aimed at investigating the mechanical behaviour of typical shear walls of light frame constructions and built with frame of Argentinean Eucalyptus grandis (eucalipto). The research was carried out on 17 panels, 15 of which distributed in 5 series with different configurations that met the construction requirements...

Wood polymer composite bonded veneer based hybrid composites

Wood veneer based composites have a great demand in present market as the material can utilize small diameter plantation timbers grown at short rotation cycle. This paper presents preparation and characterization of hybrid composites made of wood veneer and wood polymer composite. The study explored utilization of wood polymer composite as an adhesive for bonding veneers...

Mechanical and acoustic characteristics of four wood species subjected to bending load

The mechanical and acoustic properties of four commonly used wood species, including Populus tomentosa (Poplar), Swietenia mahagoni (Mahogany), Fagus orientalis (Beech), and Fraxinus excelsior (Ash) wood were investigated through using three-point bending and notched bending tests synchronizing with power spectrum analysis method and fractal dimension theory. The results showed...

Nanocellulose addition to recycled pulps in two scenarios emulating industrial processes for the production of paperboard

This study assesses the incorporation of nanocellulose in a paperboard feedstock emulating two scenarios of industrial processes. It included the production of 170 g/m2 paperboard, using mixtures of short-fiber and long-fiber fractions from recycled pulps with typical mill additives. In all cases, 3 wt. % of nanocellulose was added to the pulp suspensions. The first scenario...

Natural durability of some hardwoods imported into Korea for deck boards against decay fungi and subterranean termite in accelerated laboratory tests

This study evaluated the natural durability of seven imported hardwoods Bangkirai (Shorea laevis), Burckella (Burckella.), Ipe (Handroanthus.), Jarrah (Eucalyptus marginata.), Kempas (Koompassia malaccensi), Malas (Homalium foetidum) and Merbau (Instia) used for deck boards against decay fungi (Fomitopsis palustris, Gloeophyllum trabeum, Trametes versicolor, and Irpex lacteus...

Cellulose biosaccharification by Irpex lacteus wood decay fungus

Enzymatic hydrolysis is an environmentally friendly technology to produce sugars from pretreated biomass. Here, we show that the new Il-11 Irpex lacteus strain can synthesize cellulases in a high quantity. The peptone and filter paper contained in the medium significantly enhanced activity of endo-1,4-β-D-glucanases (app. 50 IU/mL) and total cellulases (app. 9 IU/mL), whereas the...

Water absorption, thickness swelling and mechanical properties of cement bonded wood composite treated with water repellent

In this study, the purpose was to improve outdoor performance of cement bonded wood composite due to their biodegradation and sensitivity to moisture especially in warm and humid climates. Cement bonded wood composites were treated with different concentrations (10 %, 25 %, 50 %, 75 % and 100 %) of water repellent. Water repellent used was an organo-silicon based, nano-sized, eco...

Research of computerized numerical control laser processing qualities of some wood species used ın the furniture industry

In recent years, laser material processing technology has become quite widespread. The quality of laser processing of wood materials is very important in terms of not causing secondary processes in the production process. In this study, computerized numerical control laser cutting qualities of some wood species that are frequently used in industrial product manufacturing were...

Evaluation of bean residues in the production of agglomerated panels

This work aimed to evaluate the physical-mechanical properties of Pinus oocarpa wood agglomerated panels produced with different levels (0 %, 25 %, 50 %, 75 % and 100 %) of wood replacement with bean residues. For this purpose, Pinus oocarpa wood and the agricultural residue were reduced into particles and their properties of apparent density, extractives, lignin and ash content...

The use of herbal extracts in lacquer paint coloring and determination of some mechanical resistance properties on wood-based surfaces

The aim of this study was to determine the usability of selected natural dye extracts as environmentally friendly colorants that are used in painting of MDF based furniture and evaluate their resistance to scratch resistance, adhesion resistance, and surface hardness properties. In this study, the water-based lacquer coatings were prepared with natural dyes obtained from purple...