Your search resulted in 334 documents. Displaying 25 entries per page.
Effects of Murgul Copper Process flue gases (SO2) on compression strength parallel to the grain of Beech (Fagus orientalis Lipsky.) wood
2008 - IRG/WP 08-40404
In this study was investigated the effect on the compression strength parallel to the grain as mechanical properties of Fagus orientalis Lipsky. wood exposed to SO2 gas and non-exposed.
In the experiments the two of four (total) were obtained from Artvin-Ortaköy region and the other two from Artvin-Murgul region. The compression strength parallel to the grain was calculated at the compare of ...
N Ay, E Topaloglu, A Uncu
Changes in hygroscopic, mechanical and surface properties of Scottish-grown Sitka Spruce (Picea sitchensis) wood subjected to dry heat treatment
2008 - IRG/WP 08-40415
Heat-treatment is a wood modification method which has been used to some extent in improving timber quality. However, the main limitation in the use of this technique despite its numerous advantages is the adverse effects on the various properties associated with the use of wood as an engineering material. Dry heat treatment of Scottish-grown Sitka spruce (Picea sitchensis) wood was carried out at...
L Awoyemi, M C Jarvis, A Hapca
COST Action E37. Sustainability Through New Technologies For Enhanced Wood Durability -
2008 - IRG/WP 08-40417
The main overall objective of the Action was to concentrate on the contribution of wood durability to sustainability through the development of systems for quality assurance and performance classification of modified wood and wood products as alternatives to wood treated with traditional preservatives. By this means it seeked to improve and consequently to increase the cost-effective use of compon...
R-D Peek, J Van Acker
Bi-oleothermal treatment of wood at atmospheric pressure: resistance to fungi and insects, resistance to weathering and reaction to fire results
2008 - IRG/WP 08-40418
Bi-oleothermal process is a simple treatment which has been developped by CIRAD in cooperation with FCBA. It allows a deep impregnation of wood with hydrophobic products using cheap facilities. The process includes two steps at atmospheric pressure. The first one is a dipping of wood samples in a hot oil bath (between 110 °C and 200°C) which creates an overpressure inside the wood. The second on...
L Podgorski, I Le Bayon, I Paulmier, J-D Lanvin, V Georges, D Grenier, H Baillères, J-M Méot
The effects of zinc borate treatment of wood strands on some technological properties of oriented strandboard (OSB)
2008 - IRG/WP 08-40419
In this study, influences of zinc borate treatment on some technological properties of oriented strandboard (OSB), from aspen wood (Populus euroamericana cv.) were evaluated. Therefore, a total of nine panels with dimensions of 40 cm by 40 cm by 1.8 cm and with an average target density of 0.65 g/cm3 were manufactured under the laboratory conditions. Experimental panels were manufactured at two di...
A D Çavdar, H Kalaycioglu, G Nemli
Chemical modification of Scots Pine Sawdust by mixed anhydrides
2008 - IRG/WP 08-40439
By making react mixtures containing acetic-fatty anhydrides on Scots pine sawdust (SPS) without any solvent or catalyst; we synthesized mixed acetic-fatty esters of SPS. Such mixtures were synthesized by reaction between a carboxylic acid and acetic anhydride. These mixtures were obtained after reaction of acetic anhydride and a fatty acid that yields at equilibrium a mixture of five compounds: ac...
J Peydecastaing, E Borredon, S El Kasmi
Effect of different ASAs (alkenyl succinic anhydrides) on the treatment of biological protection of wood in use class 4
2008 - IRG/WP 08-40440
The alkenyl suscinic anhydrides (ASAs) used in this work are adducts resulting from the maleinization reaction of fatty acid alkyl esters. Various products with different alkyl groups were synthesized from rapeseed (Brassica napus) oil esters, rich in oleic acid. The liquids obtained showed a viscosity similar to that of vegetable oils and a brown color. When applied into wood, a thermal treatment...
C Vaca-Garcia, O Pignolet
Categorization of 300 timber, bamboo and cane grown in Bangladesh based on their families, origins, growths, physical and mechanical properties
2009 - IRG/WP 09-10684
In this study the 300 timber, bamboo and cane plants grown in Bangladesh have been classified into various categories based on their taxonomic families, origin of species, rate of growth, color of wood, texture of wood, shrinkage of wood, equilibrium moisture content (EMC) of wood, flammability of wood, cutting and sawing properties of timber, finishing and polishing qualities of wood, machining p...
A K Lahiry
Mechanical and chemical properties of blue stained wood
2009 - IRG/WP 09-10686
Discoloration of wood is frequently caused by blue-staining fungi. In the previous researches there was general opinion that blue-stain fungi do not influence mechanical properties. On the other hand, there were some opposite results reported as well. In order to elucidate this issue, specimens made of Pinus sylvestris sapwood were exposed to two the most frequent and important blue stain fungi Au...
M Humar, V Vek, B Bučar
Effectiveness of sol-gel treatments coupled with copper and boron against subterranean termites
2009 - IRG/WP 09-30493
Wood modification by sol-gel treatments shows many positive features, like antimicrobial properties. Wood was also successfully modified with alkoxysilanes enhancing its resistance against soil micro-organisms. Silver, copper, zinc compounds, boric acid or organic biocides such as alkylammonium compounds may be added to the sol-gel to enhance its biocidal properties. Nevertheless, if some of these...
E Feci, L Nunes, S Palanti, S Duarte, G Predieri, F Vignali
Biological Treatment to Improve Wood Product Quality and Durability - Fifteen Years of Effort and Experience at FPInnovations-Forintek Division
2009 - IRG/WP 09-40444
Wood plays an important role in the world economy. However, wood is subject to attack from wood-degrading fungi and insects and durability and quality of wood products are becoming increasing concerns for consumers. Development of effective and low environmental impact technologies to improve wood product quality and durability will be required to address these concerns. The application of a bio...
Dian-Qing Yang
Enhanced uptake of wood modification agents in “bioincised” wood
2009 - IRG/WP 09-40445
The permeability of refractory wood species e.g. Picea abies and Abies alba is reduced resulting in a radial penetration of chemical solutions of only a few millimetres. Exploitation of these wood species is therefore not possible for many applications. A novel biotechnological method (European patent 05027812.6) based on the pre-treatment of wood with the white-rot fungus Physisporinus vitreus si...
F W M R Schwarze, M Schubert
Differential response of wood to dry air thermal treatment (DATT) and soy oil thermal treatment (SOTT)
2009 - IRG/WP 09-40446
Thermal treatment is an alternative to chemical modification method which has been used to some extent in improving timber quality. In order to get the maximum benefits possible without compromising the various end-use quality requirements of timber, several possibilities have been and are still being investigated in relation to this technique. Clear wood samples (19 x 19 x 150mm) of kiln-dried re...
L Awoyemi
Modification of Wood by a Water-Repellent Compound Used in the Textile Industry: Boron Release and Termite Resistance
2009 - IRG/WP 09-40447
In the study, wood specimens were treated with disodium octoborate tetrahydrate (DOT) and a commercial water and oil repellent compound, FORGUARD M®, a weak cationic emulsion containing dipropylene glycol monomethylether, water and solids in its formulation and used in the textile industry. There were two different processes for preservative treatments: double and single treatments. The leaching ...
S N Kartal, E Terzi, B Erilkun, Y Imamura
Termite resistance of some modified wood species
2009 - IRG/WP 09-40449
During the last few decades, researchers worldwide have investigated and developed new treatment techniques to improve intrinsic wood properties. Some of these techniques were introduced to the market recently and are gaining in importance.. Various wood properties of these new materials have been studied intensively. These include physical-mechanical properties (dimensional stability, moisture ...
H Militz, B C Peters, C J Fitzgerald
Microwave Surface Modification of Radiata Pine Peeler Cores for Preservative Treatment
2009 - IRG/WP 09-40453
Radiata pine peeler cores are classified as a by-product derived from the cores of logs left over after the veneer peeling process. The core can be potentially developed for value added solid wood products as it is abundantly available and has a constant diameter. However, the core needs to be preservative treated because of low durability in ground contact. An additional problem is that the wood ...
K Sugiyanto, G Torgovnikov, P Vinden
Properties of strand board bonded with ammonium pentaborate (APB) modified phenol formaldehyde resin
2009 - IRG/WP 09-40455
Ammonium pentaborate (APB) is combined with phenol formaldehyde (PF) resin in this study to develop a high-performance wood-based composite. The effect of APB and its combination with polyethylene glycol (PEG) on the physical, mechanical properties as well as formaldehyde emission of strand board were tested and compared with disodium octaborate tetrahydrateand (DOT) and zinc borate (ZB). The resu...
Wei Gao, Jinzhen Cao
Eco-Friendly Composites from Bagasse and Soy-based Resin
2009 - IRG/WP 09-40462
In this study, bagasse and soy-based resin were used for producing composite materials. The objective of this study was evaluation of some physical and mechanical properties of boards made of various ratios (100:0, 60:40, 40:60 and 0:100) of bagasse to wood fiber mixtures (wt: wt) with addition of Soy/PF resin at three levels (4, 8 and 10%) and 1.5% wax. All properties were tested according to AST...
G Rassam, B Jamnani
Weathering of Wood Modified with the N-Methylol Compound 1,3‑dimethylol-4,5-dihydroxyethyleneurea (DMDHEU)
2009 - IRG/WP 09-40467
Scots pine (Pinus sylvestris L.) sapwood boards were treated with a methylated 1,3‑dimethylol-4,5-dihydroxyethyleneurea (mDMDHEU) causing weight gains of approx. 25% and exposed to weathering for 18 months. Compared to untreated boards, treatment with mDMDHEU reduced surface discoloration mainly caused by staining fungi. Boards treated with mDMDHEU exhibited clearly lower moisture content th...
C Mai, Yanjun Xie, A Krause, K Urban, P D Evans, K Richter, H Militz
Wood properties influencing the penetration of Scots pine (Pinus sylvestris) sapwood with the wood modification agent furfuryl alcohol
2009 - IRG/WP 09-40470
The European standard EN 350-2 classifies Scots pine sapwood as class 1 (easy to treat). However large variations in sapwood penetration exist which affect a homogenous distribution of preservatives. Hence individual penetration schemes have to be developed and adjusted to the material most difficult to treat in order to provide adequate sapwood penetration. To ensure better economic process con...
K Zimmer, E Larnøy, G Koch
Material properties of furfurylated wood for window production
2009 - IRG/WP 09-40480
Wood modification with furfuryl alcohol is an extensively investigated process and already produced commercially. Furfurylated wood is in the focus of a European project on its use for the production of high performance windows. Different wood species were treated with furfuryl alcohol and tested on water uptake, dimensional changes, leaching in water, resistance to fungal degradation, and ecotoxi...
A Treu, A Pilgård, S Puttmann, A Krause
Physical and Mechanical Properties of Bamboo Oriented Strand Board Treated with Copper-based Preservatives
2009 - IRG/WP 09-40482
Oriented strand board (OSB) has been gradually accepted, used and developed in China. Bamboo is a renewable and potential non-wood fibre resource for making OSB. But the nature of bamboo makes its products including bamboo OSB (BOSB) more prone to decay and mold. Protection BOSB from biodegradation is the key both to efficiently using bamboo resource and to improving the durability of the final pr...
Juwan Jin, Daochun Qin
The use of thermal desorption and pyrolysis combined with a semiconductor VOC detector for the on-site detection of preservative-treated wood
2010 - IRG/WP 10-20456
The purpose of this study was twofold; to identify possible marker molecules released from preservative-treated wood upon heat treatment and then develop a prototype detector for this marker. Two methods for heating the samples were used: Pyrolysis combined with Gas-Chromatography with IR-detection and Thermal Desorption combined with Gas-Chromatography with mass detection. A first prototype detec...
I Svensson, A Gonzalez, L Irusta, Mª J Fernandez-Berridi, O Munné
Effect of 4 Preservatives on Physical, Mechanical and Mold-Resistant Properties of Bamboo Oriented Strand Boards
2010 - IRG/WP 10-40483
This study investigated the effects of 4 preservative systems on physical, mechanical and mold-resistant properties of bamboo oriented strand board (OSB) panels bonded with urea formaldehyde resin. Preservative A (Zinc Borate), B (IPBC), C (AAC+Borate) and D (carbendazim + prochloraz) were incorporated with strands during blending at three loading levels. The results showed that the mechanical and...
Juwan Jin, Daochun Qin, Wanshu Wei, Kuan Fan
Fungal decay resistance and mechanical properties of plywood panels made from maritime pine (Pinus pinaster) and bonded with cornstarch-quebracho tannin-phenol formaldehyde adhesive
2010 - IRG/WP 10-40490
The aim of this work is to demonstrate the performances of cornstarch-quebracho tannin-based resins designed as adhesive in the plywood production. In this way, the cornstarch and quebracho tannin was introduced in the classic adhesive formulation in order to supply a part of phenol-formaldehyde (PF). In order to evaluate the mechanical performances of optimal cornstarch-quebracho tannin-PF, plywo...
F Charrier, A Moubarik, A Allal, A Pizzi, B Charrier