Your search resulted in 585 documents. Displaying 25 entries per page.
The resistance to Basidiomycetes fungi of chipboard 35 years after their industrial preservation with wood preservative on fluoroborate basis
2011 - IRG/WP 11-40546
The research on wood-based panels’ (WBP) behaviour towards fungi impact demonstrated rather low resistance of wood-based materials to wood rotting fungi. However, these materials are used in construction under conditions favourable to fungi growth. In such conditions WBP treated with wood preservatives should be used. Preservation durability is of great importance in such cases. The resistance o...
A Fojutowski, A Kropacz
Decay resistance of a commercial pistachio twig-plastic composite
2011 - IRG/WP 11-40553
In this research, the decay resistance of commercial extruded pistachio twig flour-plastic composite was investigated against the white-rot fungi Trametes versicolor and the brown-rot fungus Coniophora puteana. The composite specimens containing 60% pistachio twig flour were exposed to a decay test according to modified ASTM standard for 3 months. The results showed that the composite could be d...
M R M Farahani, M Safarzadeh
Effects of Heat-Treatment in Hot Water and Steam Mediums on Gas Permeability of Beech Wood
2011 - IRG/WP 11-40557
Heat-treatment, as a major method of wood modification, improving dimensional stability, and natural durability, has been studied greatly from different aspects. The effect of heat-treatment on gas permeability, as an important physical property of wood, in two different mediums of hot water and steam, as well as in two buffers of 7 and 8, is the main topic of the present study. Hydrothermal treat...
H Reza Taghiyari, A Talaei, A Karimi
Utilization of thermodesorption coupled to GC-MS to study kinetics of thermodegradation of different wood species
2011 - IRG/WP 11-40559
Thermdesorption coupled to Gas Chromatography coupled to Mass Spectroscopy (TD-GC-MS) has been investigated to identify volatile degradation products generated during wood heat treatment by mild pyrolysis. For this purpose, wood samples of different softwood and hardwood species have been heat treated under nitrogen for different temperatures comprised between 180 and 230°C during 15 min. in the ...
K Candelier, M Chaouch, S Dumarçay, A Pétrissans, M Pétrissans, P Gérardin
Effect of Nano-silver Treatment on Densified Poplar Wood Properties. Part Two: Spring Back, Compression set, Impact Load Resistance and Hardness
2011 - IRG/WP 11-40568
This paper is the second part of the study of applying nano-silver treatment before densification of poplar wood (Popolus alba). The specimens were prepared in four groups of: 1) nano-silver impregnated 2) water impregnated 3) dried with no impregnation and 4) the control specimens. The impregnation process was done by empty cell process. Then, the groups of 1 to 3 were compressed in a hot press a...
G Rassam, H Reza Taghiyari, B Jamnani, M Ali Khajeh
Effects of nano-silver on brittleness of heat-treated solid woods
2011 - IRG/WP 11-40572
The present study is aimed at the effect of heat-treatment of normal as well as nano-silver-impregnated Populus nigra, Populus deltoides, and Fagus orientalis on brittleness. Specimens were impregnated with 200 ppm water-based solution of nano-silver particles under 3 bars in a pressure vessel using empty-cell process. For heat treatment, both nano-silver-impregnated and normal specimens were kept...
H Reza Taghiyari, B Moradi Malek, A Karimi
The overview of ISPM 15 implementation in Croatian wood-working companies
2011 - IRG/WP 11-30576
Croatia is a small European county, but in the same time a great country according to it’s tradition in the forestry and wood working industry. However, around 48% of it’s territory is afforested. As the export is one of the main directions in the Croatian development conception, the production and distribution of wood package intended for the international trade, is one of the most important ...
R Despot, V Jambrekovic, M Hasan
Eastern redcedar included sapwood: Resistance to mold and termites under laboratory conditions
2012 - IRG/WP 12-10765
The heartwood of eastern redcedar (Juniperus virginiana) frequently contains areas of light-colored wood. This “included sapwood” is considered to be a defect by some manufacturers. In this study, sapwood, included sapwood and heartwood samples from five eastern redcedar trees were exposed to mold fungi or to subterranean termites in a no-choice feeding test. Extractives content was also measu...
C Köse, A M Taylor
Laboratory and Field evaluation on Natural Resistance and Feeding Preference of Different Wood Species to Subterranean Termites (Isoptera: Rhinotermitidae, Termitidae) in Pakistan
2012 - IRG/WP 12-10769
The resistance of twenty four different woods to attack and damage by subterranean termite species Heterotermes indicola (Wasmann) and Coptotermes heimi (Wasmann) was evaluated by choice and no choic in laboratory and field trials. Mean wood mass loss was calculated for both laboratory and field trials results using Analysis of Variance (ANOVA). Mean percentage termite mortality was calculated fo...
S A Malik; F Manzoor, B M Ahmed (Shiday)
Influence of soil moisture, Sarawak soil types and decay types on decay susceptibility of rubberwood and kelempayan
2012 - IRG/WP 12-10780
Wood and soils are important natural resources of the land, the former widely used as structural supports in contact with the latter. Many low durability wood species exposed to soil contact has reportedly high incidence of decay failures in poorly treated and untreated materials depending on soil types, properties and soil microbial virulence. This paper probes the relationship of the main soil t...
A H.H. Wong, P K.F. Chong, J Sabang
Coconut lumber for wood decks (Cocos nucifera L.): decay resistance against Basidiomycetes fungi
2012 - IRG/WP 12-10784
Since a couple of years, manufactured products of coconut wood for outdoor uses like wood decks have been proposed on the European market. These are presented as an alternative for traditional tropical timbers. In the past, coconut wood was neglected and burned for sanitary reasons and lack of interest at industrial scale. Plantation coconut trees at end of production of copra constitute a renewab...
B Jourez, C Verheyen, J Van Acker
A survey on Bio-Resistance of Oak and Elm in Caspian Sea Water
2012 - IRG/WP 12-20483
Logs of Oak (Quercus castanifolia) and Elm (Zelkova carpinifolia) have been cut to lumbers with dimensions of 300×100×30 mm. The oven dried samples have been impregnated with CCA (Chrome–Cupper-Arsenic). Treated and untreated (natural as a control) woods have been established for 3, 6, 9 and 12 months in Amirabad beach of Behshare under fishing environment. The observation results shows that i...
S M Kazemi
Durability of timber products – Part 2: Proposal for an IRGWP - Durability Database
2012 - IRG/WP 12-20497
A proposal for a web-based platform for scientific exchange of test data in the field of wood durability and wood protection has been made. The overall aim of the durability data base is to improve the usability of existing test data and to create an added value for durability research and service life prediction.
The database allows for test results from standardized and non-standardized laborat...
C Brischke, L Meyer, G Alfredsen, M Humar, L Francis
Durability of timber products –Part 1: Inventory and evaluation of above ground data
2012 - IRG/WP12-20498
The material-inherent resistance of wood is one of the most important qualities influencing the durability of timber. Hence, it has also a major effect on the service life to be expected from a timber construction. In addition, design details and the respective climatic conditions determine durability and make it impossible to treat wood durability as an absolute value. Moreover, the reference mag...
C Brischke, L Meyer, G Alfredsen, M Humar, L Francis, P O Flæte, P Larsson Brelid
Mould resistance of bamboo timber treated with tebuconazole-loaded micells
2012 - IRG/WP 12-30586
In this paper both anti-mould test through inhibition zone and mould resistance test on bamboo samples were carried out evaluate mould resistant effect of tebuconazole (TBA) loaded micells. Results showed that TBA loaded micells prepared with a ratio of TBA to PEG113-b-PCL28 50:25 had the best mould resistance, followed by micells prepared with a ratio of TBA to PEG113-b-PCL28 50:50. PEG113-b-PCL2...
Sun Fangli, Chen Anliang, Bao Binfu, Zhou Yueying, Zhang Shaoyong, Zhang Xu
Tannin resin-boron associations: Leaching and biological resistance
2012 - IRG/WP 12-30587
The easy leaching of boron in wood preservation formulations has allowed to use this fungicide only for short term applications. The recently discovered adduct with flavonoids allows boron to resist longer periods of time within wood and consequently extend its life. Two different leaching treatments were compared and the fungal and termite decay was examined. The biological tests have shown extre...
G Tondi, S Wieland, N Lemenager, A Petutschnigg, A Pizzi, M-F Thevenon
Termite resistance of copper-based preservative supplemented aspen strandboards
2012 - IRG/WP 12-30594
Termite resistance of aspen strandboards treated with various copper-based preservative systems was evaluated in field exposure tests. Five copper-based chemicals or zinc borate were blended into aspen furnish at three retention levels prior to pressing. Tebuconazole or 4,5-dichloro-2-N-octyl-4-isothiazolin-3-one (DCOI) were added as co-biocides to selected copper-based treatments. Sections from...
J J Morrell, C Vidrine, A Preston, L Jin
Study on the Effect of Combined Nanosilver-Hygrothermal Treatment on Wood Properties
2012 - IRG/WP 12-40581
In this study, the impregnation process with nanosilver solution, before hygrothermal treatment was carried out to investigate its effect on some physical and mechanical properties of Iranian beech (Fagus orientalis Lipsky) and Russian imported spruce (Picea abies). Wood specimens were impregnated with nanosilver solution (400ppm) in an impregnation tank under pressure of 0.25 Mpa, for 20 minutes....
G Rassam, H Reza Taghiyari, A Karimi, B Jamnani, M Ebrahimi
The resistance of thermo and thermo-oil modified black poplar wood (Populus nigra L.) to Basidiomycetes fungi
2012 - IRG/WP 12-40585
The share of area taken by poplar tree species in Poland account for 2.0% of the area of state forests, 4.8% of national parks and for 2.3% in the privately-owned forests. It is shown and expected an increase in the share of poplar stands connected with plantation of fast growing trees. The poplar wood is not resistant to Basidiomycetes fungi, easy attacked by insects and in consequence is regarde...
A Fojutowski, A Kropacz, A Noskowiak
Influence of heat treatment intensity on the structural integrity of 14 timber species
2012 - IRG/WP 12-40586
Thermally modified timber (TMT) is characterized by improved durability and dimensionally stability, but strength properties, especially the dynamic ones, are compromised at the same time. Because dynamic standard tests require high efforts and time, the high-energy multiple impact (HEMI) –test was developed for the fast and reliable characterisation of the structural integrity of TMT, showing a...
C R Welzbacher, C Brischke, G Maier
Relationships between heat treatment intensity and some conferred properties of different European softwood and hardwood species
2012 - IRG/WP 12-40593
Effect of treatment intensity on conferred properties like elemental composition, durability, anti swelling efficiency (ASE) and equilibrium moisture content (EMC) of different European softwood and hardwood species subjected to mild pyrolysis at 230°C under nitrogen for different durations has been investigated. Independently of the wood species studied, elemental composition is strongly correl...
M Chaouch, S Dumarçay, A Pétrissans, M Pétrissans, P Gérardin
A survey of factors affecting decay resistance of wood modified with acetic anhydride
2012 - IRG/WP 12-40594
From the range of information published, acetylation appears well suited to provide adequate protection against biological attack for materials derived from typically non-durable wood species. Acetylated wood is now commercially available both in Europe and in the USA. But still there are a lot of unanswered questions related to fungal decay mechanisms in acetylated wood. The paper summarize exist...
G Alfredsen, P O Flæte, H Militz
Effects of nano-wollastonite impregnation on fire resistance and dimensional stability of Poplar wood
2012 - IRG/WP 12-40595
The fire-retardant properties of Nano-Wollastonite (NW) in poplar wood (Populus nigra) were determined in this study. Some physical properties such as water absorption, volumetric swelling and Anti-Swelling Efficiency (ASE) were also measured. Specimens were prepared according to the ISO 11925 standard for the fire-retarding properties, and ASTM D4446-2002 standard for the physical properties. Imp...
A Karimi, A Haghighi Poshtir, H Reza Taghiyari, Y Hamzeh, A Akbar Enayati
The Effects of Industrial-Scale Heat Treatment and Impregnation with Boron Compounds on Water Uptake and Tangential Swelling of Some Wood Species
2012 - IRG/WP 12-40599
This study evaluated the effects of boron impregnation and heat treatment on water uptake and tangential swelling of spruce (Picea orientalis), pine (Pinus nigra), beech (Fagus orientalis) and poplar (Populus deltoides) wood species. The samples (10 x 5 x 40 - tangential x radial x longitudinal cm) were impregnated with 4 % boric acid and 4 % borax according to the ASTM D-1413 standard method. Aft...
A Can, S Yildiz, Ü C Yildiz
Corrosion of fasteners in heat-treated wood – progress report after nine years’ exposure outdoors
2012 - IRG/WP 12-40601
The corrosion of common fastener materials now in use - mild steel, zinc-coated steel, aluminium and Sanbond Z-coated steel – has been evaluated after nine years’ exposure outdoors in untreated and heat-treated (thermally modified) spruce (Picea abies). Spruce from south-western Sweden was used. The heat-treatment was carried out in Finland by Stora-Enso Oy according to the ThermoWood process ...
J Jermer, B-L Andersson