Your search resulted in 474 documents. Displaying 25 entries per page.
The resistance of composite boards protected with azole and inorganic nanoparticles to basidiomycetes and moulds
2015 - IRG/WP 15-40688
This paper presents a study on the resistance of wood composite boards, glued with silicone adhesive and obtained from chips of Scots pine Pinus silvestris L. and willow Salix viminalis L., to basidiomycetes and mould. The boards were protected in the production processes with fungicides based on metal nanoparticles, as well as on derivatives of 1,2,4-triazole, benzimidazole, and thiazole. The bio...
J Zabielska-Matejuk, I Frąckowiak, A Stangierska
A review of the analytical methods used in determining the decay resistance of heat treated wood
2015 - IRG/WP 15-40690
Heat treatment as a wood process is increasingly used because of its non-biocide behaviour and its low environmental impact. This sort of treatment is based on biopolymer chemical degradation by heat transfer. This process improves mainly the dimensional stability and the decay resistance of wood.
Wood becomes darker after this type of treatment and thus gives it an aesthetic appearance. These i...
K Candelier, M-F Thévenon, A Pétrissans, S Dumarçay, P Gérardin, M Pétrissans
Termite and insect resistance of acetylated wood
2015 - IRG/WP 15-40703
The benefits from acetylation of wood to enhance resistance against fungal decay and dimensional stability have been known for many years. Since 2007 Accsys Technologies has been commercially producing Accoya® wood that is based on acetylation of radiata pine. A number of studies on the resistance of acetylated wood to attack by wood destroying termites have been conducted, but there is no common...
F Bongers, M Kutnik, I Paulmier, J Alexander, H Militz
Minimum standards for habitability in emergency housing
2015 - IRG/WP 15-50312
In this study we evaluated the properties of a prefabricated HOUSING prototype based on a 64mm thick "Structural Insulated Panel" (SIP; hereinafter SIP64), built by two OSB panels bonded with a two component polyurethane adhesive to a high density expanded polystyrene core. This panel was manufactured as a main element for walls in the construction of emergency housing. The thermal insulation of t...
R Garay, F Pfenniger, W Figueroa
Shells of Coconut and their Durability against Termite Attack
2015 - IRG 15-10853
All tropical and subtropical areas of the Earth are inhabited by termites. In climates with moderate temperatures, they occur less frequently. Especially wood and non-wood materials that grows in tropical areas and used there in timber constructions and woodworking, wood durability and protection against termites should be researched. This paper reports findings from an experimental “AW011” la...
M Dass, A H H Wong, W Unger
Evaluating the Effects of Post Dip-Treatment Laser Marking on Resistance to Feeding by Subterranean Termites
2016 - IRG/WP 16-10854
Dip-treatment of wood packing materials is often used instead of pressure treatment mainly because of issues relating to simplicity and cost. Packaging boxes fabricated for the United States Army are required to be dip-treated for at least one minute in an approved preservative solution prior to use. These boxes are expected to have a service life of up to 20 years in a wide variety of environment...
R A Arango, B Woodward, S Lebow
Susceptibility of wood substrates to Aurebasidium pullulans at different temperatures
2016 - IRG/WP 16-10863
There is an increasing awareness of how the aesthetical performance of wood exposed outdoors changes over time and especially in the first few years after installation. Mould and blue stain fungi are biological agents that contribute to the weather grey colour on a wooden façade, and the blue stain fungi Aureobasidium pullulans is commonly identified as colonizer on coated and uncoated wood expos...
L Ross Gobakken, G Alfredsen
On the effect of climate and exposure conditions on durability indicators and their potential for service life prediction of wood-based products
2016 - IRG/WP 16-20576
In order to encourage increased use of wood, different user groups need to be better informed regarding the variation in performance between different wood materials and the effect of different use classes. It is also important to provide good empirical data on the service life of wood products as input to for example life cycle assessment studies. In the current study the effect of temperature an...
G Alfredsen, C Brischke, P-O Flæte, M Humar, L Meyer-Veltrup
Screening of fastener resistance in contact with untreated wood using different test designs
2016 - IRG/WP 16-30686
The performance of fasteners in wooden constructions is an important aspect especially regarding corrosion resistance. In an early stage corrosion of fasteners in untreated timber becomes often visible as a discoloration on the surface of the timber resulting in bad appearance of the product followed by complaints. In order to develop an accelerated test for the assessment of fastener performance ...
E Melcher, S Wolf, U Cera
Laboratory and Field evaluation on Resistance of Thiacloprid-treated Pine Species to Termites in Mexico
2016 - IRG/WP 16-30687
The usage of Neonicotinoids for wood preservatives is common practice in several countries. Especially the active ingredient Imidacloprid is well established for this application due to its high efficacy against termites. (2Z)-3-(6-chloro-3-pyridylmethyl)-1,3-thiazolidin-2-ylidene-cyanamide, also known as Thiacloprid showed a good efficacy against Reticulitermes santonensis De Feytaud in efficacy ...
P Meckler, T Jaetsch, I Rodriguez
The termite resistance of wood impregnated with nano-zinc oxide and nano-zinc borate dispersions
2016 - IRG/WP 16-30691
In this work, the effects of the impregnation with nano-ZnO and nano-ZnB dispersions on the termite resistance of European beech wood were investigated. Three different concentrations (namely 0.5%, 1% and 2%) of the above two materials were tested. Water leaching effect was also investigated. It was concluded that a severe effect in terms of termite workers mortality is induced by the use of both ...
C Lykidis, T de Troya, M Conde, J Galván, G Mantanis
Protection of bamboo against fungi by Laccase-Catalyzed Iodination
2016 - IRG/WP 16-30694
This paper investigated the effectiveness of bamboo treated by laccase-catalyzed oxidation of potassium iodide. Hence, the indoor and outdoor mold fungi resistances were carried out according to the AWPA (2007) Standard E24–06. According to the results, after 35days good resistances against the fungi were in the order of Trichoderma viride > Penicillium citrinum >Aspergillus niger. It was also o...
K P Nayebare, Shaoyong Zhang, Fangli Sun, B Goodell
Decay resistance of wood treated with bio-friendly preservative systems
2016 - IRG/WP 16-30698
Due to more restrictive toxicological requirements and increased ecological awareness of consumers, wood preservatives containing biocides are no longer desired on the market. Therefore, research on new environmentally friendly formulations is of great importance. One of the possible solutions is to develop new preservatives based on natural substances, which are harmless to humans, animals and th...
B Mazela, G Cofta, W Perdoch, L Ross Gobakken, P Kwaśniewska-Sip
Decay resistance of beech wood and plywood treated with different type of phenol-formaldehyde (PF) resins
2016 - IRG/WP 16-40717
In this study treatment of beech and poplar wood veneers with (PF) resin industrial scale and screening tests of nine different phenol-formaldehyde (PF) resins were made. Specifically, the effect of different phenol-formaldehyde (PF) resin types on the resistance of beech wood against brown- and white-rot fungi was evaluated. Criteria for selection of optimal (PF) resin were based on minimum WPG ...
V Biziks, S Bicke, H Militz
Resistance of heat treated Ash wood under steam pressure: rot fungi, soil micro-organisms and termites
2016 - IRG/WP 16-40724
Thermal modification processes have been developed to increase the biological durability and dimensional stability of wood. The aim of this paper was to study the influence of ThermoWood® treatment intensity on wood decay resistance improvement against soil-inhabiting micro-organisms, brown/white rots and termite’s exposures. All of the tests were carried out in the laboratory with two differen...
K Candelier, S Hannouz, M-F Thévenon, D Guibal, P Gérardin, M Pétrissans, R Collet
The durability of natural and thermomodified black poplar wood and Scots pine sapwood after two years of external exposition
2016 - IRG/WP 16-40730
Natural biological durability of many European wood species is considered to be relatively small, particularly in a ground contact conditions. This is due to the exposure of the wood to the range of biological and atmospheric destructive factors. This may to limit the scope of application of the wood of these species, particularly in construction. The biocides are often used for wood protection in...
A Fojutowski, A Kropacz, A Noskowiak
Superhydrophobic treatment of Norway spruce wood for improvement of its resistance against brown rot and moulds
2016 - IRG/WP 16-40734
Water repellence of wood can be increased and its some other properties influenced by introduction of hydrophobic chemicals into and on cell walls without affecting the wood’s bulk density due to lumen filling. Herein, a simple dipping method to insert octadecyltrichlorosilane (OTS) into cell walls and to deposit the self-assembled hydrophobic monolayers (SAMs) of OTS is reported. It was found o...
A Kumar, P Ryparová, P Hajek, B Kričej, M Pavlič, A S Škapin, M Šernek, J Tywoniak, J Žigon, M Petrič
Colorant Treatments to Enhance the Weathering Resistance of Western Red cedar
2016 - IRG/WP 16-40737
Western redcedar is renowned for its decay resistance, but, like most wood products, it requires frequent maintenance in many exterior applications to maintain its appearance. To provide adequate long-term performance in exterior applications, it must be protected against light, water, and disfiguring fungal growth. Colorant treatments, with and without preservatives, were investigated for their a...
R Stirling, V Landry
Enhancing wood properties through bio-based and non-biocidal co-polyesters
2016 - IRG/WP 16-40740
The commonly used wood preservation treatments are nowadays facing huge environmental issues, as well as increasing public concern. As regards those concerns, legislation tends to regulate the use of biocidal preservation chemicals.
Thus, it does appear crucial to provide alternatives to the use of biocides to allow different outdoor uses of wood such as for, posts, decking, and cladding or even ...
C L’Hostis, M-F Thévenon, E Fredon, P Gérardin
Fungal resistance and accelerated weathering of Wood-Plastic composites reinforced with Maritime pine wood flour
2016 - IRG/WP 16-40750
This study evaluates the durability of wood-polymer composites (WPCs) elaborated for use in cladding application from recycled polypropylene (rPP) and wood flour. Local Maritime pine wood flour derived from regional sawmills was used in the study to reduce the environmental impact associated with transport. Different wood-plastic ratios with and without UV stabilizers and biocide were tested. One ...
M Jebrane, T Fournier, N-E El Bounia, F Charrier-El Bouhtoury
Development of a new method for wood hydrophobizing and fixation of copper compounds by chemical hardening of vegetable based modified oils
2016 - IRG/WP 16-40754
Wood products with ground and direct water contact, but without sufficient biological durability, have to be protected against biological degradation by fungi and other microorganisms. Due to European legislation (Biocidal Products Regulation 528/2012), the selection of possible chemical agents, which are still allowed to be used, is diminishing rapidly. The use of previously widely applied, very ...
C Swaboda, M Fischer, K Jacobs
Marine Borer Resistance of Acetylated and Furfurylated Wood – Results from up to 16 years of Field Exposure
2016 - IRG/WP 16-40756
Furfurylated and acetylated Scots pine sapwood has been tested since 1999 in a marine field with high marine borer activity. In 2004, two test groups with acetylated southern yellow pine (product later known as Perennial Wood™) were put out and over the whole test period differently furfurylated wood (later marketed as Kebony®) test groups have been started. Furthermore, some combinations of mo...
M Westin, P Larsson Brelid, T Nilsson, A O Rapp, J P Dickerson, S Lande, S Cragg
Effect of Furfurylation on Shear Strength of Bond Line and Screw Withdrawal Resistance of Beech and Fir Wood
2016 - IRG/WP 16-40757
The aim of this study was to investigate the effects of furfurylation on shear strength of bond line and screw withdrawal resistance of beech (Fagus orientalis) and fir (Abies alba) species. In this regard, specimens with two different values of furfurylation i.e. low (fir 14% and beech 20%) and high (fir 38% and beech 65%) levels were prepared and evaluated in comparison with untreated specimens....
A Talaei, H Abdolzadeh, M Saleh Zare
Effect of different concentration of furfurylation on physical properties and decay resistance of Paulownia wood
2016 - IRG/WP 16-40762
The furfurylation process is an extensively investigated wood modification process. Penetration of Furfuryl alcohol molecules into the wood cell wall results in a permanent swelling. In the present study, different concentrations effect of furfuryl alcohol monomer on physico-biological properties such as water uptake, dimensional stability and decay resistance of wood polymer made by fast-growing ...
M Ghorbani, H Asghari
Accelerated weathering and fungal resistance of wood modified with isopropenyl acetate
2016 - IRG/WP 16-40764
Chemical modification of Rubberwood (Heveabrasiliensis Müll.Arg) with isopropenyl acetate (IPA) in presence of anhydrous aluminum chloride and iodine as catalysts was carried out. Modified wood surfaces were exposed to UV light source in an accelerated weathering tester to evaluate UV resistance. Anti-swelling efficiency (ASE) and fungal resistance of modified wood were also evaluated. Modified w...
G B Nagarajappa, K K Pandey