Your search resulted in 1736 documents. Displaying 25 entries per page.
Functional silicones used for wood protection: preliminary study
2017 - IRG/WP 17-30720
Due to worldwide regulation the wood preservation domain is constantly changing. Silicones are used for different industrial applications as hydrophobic agents. This property could enable to reduce water uptake of wood treated with these compounds. Treated wood could then be less prone to dimensional variation and fungal attack, those parameters being driven by variations in wood’s moisture cont...
C Reynaud, F Marchal, F Pochon, M Kutnik
UV-curable coatings developed for aesthetic and biological protection of wood outdoors
2017 - IRG/WP 17-40821
To avoid wood greying, dimensional variations, and degradation by biological agents wood is protected with preservation products and coatings when used outdoors. For some wood species used for cladding, a treatment with a preservation product is required, and is frequently additionally protected with a coating. In this study, Mäder Group developed a new UV-curable coating for outdoors application...
C Reynaud, A S Schuller, M Kutnik, L Podgorski
Markers of quality in self-bonded beech boards
2017 - IRG/WP 17-40820
A self-bonding phenomenon takes place when five layers of beech (Fagus Sylvatica L.) veneers are pressed at temperatures higher than 200ºC. If the pressing temperature between veneer surfaces reaches at least 225ºC during pressing and if the pressure applied is optimal, water-resistant bonds are formed between veneers. This study investigates the relation of thickness reduction (marker of compre...
C Cristescu, D Sandberg, O Karlsson
Exterior paint for the future - Will there be any dry-film preservatives left?
2017 - IRG/WP 17-50332
Wooden houses have a long tradition in several of the Nordic countries. Wood can be protected in various ways; constructional, chemically and by surface treatment. The use of various types of exterior paints as a surface treatment is a common way to prolong the durability of the wood. To further protect the painted surface against growth of fungi and algae, dry-film biocides remains an essential p...
H Jensen, M Sandve, S M Lystvet
Five-year evaluation of a field trial of Eucalyptus grandis poles treated with zinc and boron
2017 - IRG/WP 17-30721
Round Eucalyptus wood treatment in sequential stages with inorganic borates and metal salts (zinc sulfate and boric acid+borax) was studied; the aims were to form an insoluble precipitate of zinc borate inside wood and to reduce treatment costs by performing the first treatment by simple ascent and diffusion of the preservative, at the same time as it was sought to impregnate the heartwood. The se...
C Ibáñez, A Camargo, C Mantero, M Rabinovich
Above-ground performance of a buffered amine oxide treatment system against Mastotermes darwiniensis
2016 - IRG/WP 16-10855
Above-ground H2 field tests against Mastotermes darwiniensis were conducted in far north Queensland to assess the efficacy of buffered amine oxide treatments in the softwoods Pinus sylvestris and P. radiata, and the hardwoods Eucalyptus regnans and E. diversicolor. Untreated hardwoods and slash pine bait wood (P. elliottii) were severely attacked or destroyed, while untreated P. sylvestris was mod...
L J Cookson, R W Clawson Jr
High-frequency monitoring of mass loss due to brown rot degradation of modified wood
2016 - IRG/WP 16-10862
Fungi growing in liquid culture undergoes three separate phases in which they i) adapt to the new environment, ii) grow unrestrictedly and exponentially, and iii) are inhibited to increase in number/mass due to lack of nutrients etc. Filamentous fungi have been shown to exhibit similar growth phases in a solid food substrate and have been modelled to grow in this way also in solid wood. In modifie...
R Ringman, A Pilgård, K Richter
Formation of biofinishes on outdoor exposed wood; the impact of wood-oil combination and geographical location
2016 - IRG/WP 16-10864
Growth of dark moulds enables the use of a decorative and protective biofinish for wood, showing advantages compared to traditional wood-coatings in terms of sustainability and self-repair. Based on the formation of a uniform mould covering on oil treated wood during outdoor exposure, the utilisation of a biofinish is in development. Basic information is lacking on the correlation between exposure...
E J van Nieuwenhuijzen, L Ross Gobakken, M F Sailer, R A Samson, O C G Adan
New approach to improve the estimation of colony population in subterranean termites (Blattodea: Rhinotermitidae)
2016 - IRG/WP 16-10866
The aim of this study was to estimate the mortality and fading effects of dye markers Neutral red and Nile blue commonly used in the estimation of termite colony population, in order to determine the decrease rate from the initial number of marked and released termites. This rate can be considered in the application of the different indexes used to calculate the number of termites of the colony. I...
E Alcaide, R Molero, J Diz, M Gaju
CCA Treated Wood, Will It Last 100 Years?
2016 - IRG/WP 16-20575
Copper, chrome and arsenate (CCA) treated wood has a very successful history of use in New Zealand, for at least 60 years. In many parts of the world, CCA has been used for timber treatment since the mid-1930s. In this report, data are presented on the performance of CCA treated pine stakes and poles. Results from ground contact durability tests at Scion and other overseas test performance data su...
T Singh, D Page
Characterization of waste from Pinus radiata generated during industrial thermal-treatment
2016 - IRG/WP 16-20586
The thermal-treatment is an established chemical-free process to modify wood, improving the durability and physical properties of wood through its service life. During the hydro-thermolysis several reactions from wood components occur, releasing volatile and non-volatile compounds from wood to the chamber. Once the process is accomplished, solid residues agglomerate below the wood load and gaseous...
R Herrera, D Thomas da Silva, R Llano-Ponte, J Labidi
Durability of a willow/plastic composite mat
2016 - IRG/WP 16-20592
Developing uses for wood wastes could enhance utilization of low value renewable materials while creating opportunities for rural development. Small diameter willow stems have little use in China, but they could be combined with high density polyethylene to create wood plastic composite mats for decorative applications. These mats could be used in exterior, above ground exposures, but would still ...
Li Yan, Haiyan Duan, Beizhan Quan, J Cappellazzi, J J Morrell
Distribution and penetration of the tung oil in wood studied by high-resolution magnetic resonance imaging
2016 - IRG/WP 16-20593
Water repellents as environment-friendly treatments are gaining their popularity as non-biocidal solutions for wood protection. One of the most important water repellents for wood besides waxes and organosilicon compounds are drying oils. Tung oil is one of the best performing oil. However, tung oil, similarly as other oils, does not penetrate deeply into wood, due to its high viscosity. In order...
M Žlahtič, U Mikac, I Serša, M Merela, M Humar
Performance of copper treated poles and posts after three to fifteen years of exposure
2016 - IRG/WP 16-20595
Copper based wood preservatives are one of the most important wood preservatives for heavy-duty applications. Wood treated with copper-based preservatives performs excellent if applied according to preservative specifications. If used improperly premature failures might appear. In order to elucidate properties of copper treated wood in use, utility poles and posts treated with copper-based preserv...
M Humar, N Thaler
Engineering for Rural and Civil Development. Uni Performance of wood exterior structures above ground contact in Spain built with softwood species. The situation of cases in northern Spain
2016 - IRG/WP 16-20597
Across Europe is very common to find exterior structures build in sawn and glue-laminated wood. Most of these exterior structures used softwood wood species such as fir, spruce, larch and pine. In Spain wood exterior structures, as for example bridges, became more and more popular since eighties, when sawn and glue-laminated wood were utilized for building exterior wooden structures in overall Spa...
D Lorenzo, J Fernández-Golfín, M Touza
Insight in moisture dynamics of wood treated with organosilicon compounds
2016 - IRG/WP 16-20598
The SILEX project “Improving sustainability of construction materials using innovative Silicon based treatment” is a Life+ project with reference LIFE+11 ENV/BE/1046 and started in April 2013. This project intends to demonstrate that a new class of compounds can be used for wood treatment for an extended service life combined with enhanced new testing methodology. The project aims at demonstra...
J Van Acker, J Van den Bulcke, I De Windt, S Colpaert, S De Rocker, S Salvati, J-P Lecomte
Effects of fungal exposure on air and liquid permeability of nanosilver- and nanozincoxide-impregnated Paulownia wood
2016 - IRG/WP 16-30680
Effects of aqueous dispersion of silver and zinc-oxide nano-particles on air and liquid permeability of Paulownia wood exposed to T. versicolor were studied in the present research project. Specimens were also heat-treated at 100 and 150°C and compared with the control specimens. Permeability values were measured when the moisture content of the specimens was 12%. Results showed significant incre...
H R Taghiyari, A Kalantari, M Ghorbani Kookandeh, F Bavaneghi, M Akhtari
A non-VOC approach of solvent-based wood preservatives for remedial treatment
2016 - IRG/WP 16-30681
Solvent-based wood preservatives are the workhorses in the field of remedial treatment. Due to new European regulations on the indoor air quality there is an increasing pressure on the VOC-content on these solvent-based product types. The transfer of these European regulations into national law is left up to each European member state and handled in different ways. E.g. France has introduced a VO...
M Pallaske, S Hellkamp, P Jüngel
Effect of the Storage Time of Logs in Anti-Stain Treatment Effectiveness
2016 - IRG/WP 16-30683
Storage of green lumber, for 7 months, operationally treated with anti-stain products, depending on the storage time of the logs (10, 20 and 30 days) post harvesting allows to affirm that with increasing storage time of the logs, occurs a progressive increase in intensity, severity and types of fungi present in the logs. It is further noted, a significant increase in the percentage of sawn lumber ...
M A Peredo, C Barria
Performance of 3-iodo-2-propynyl butyl carbamate (IPBC) in L-joints under tropical conditions
2016 - IRG/WP 16-30688
The ability of 3-iodo-2-propynyl butyl carbamate (IPBC) to protect wood against fungal decay out of soil contact was evaluated using ponderosa pine L-joints at two exposure sites over a 12 year period. IPBC tended to provide better protection when formulated in an organic solvent and when applied using a double vacuum treatment. Performance also tended to be better when systems contained a water...
J J Morrell
Termiticidal Effect of Bitumen and Creosote oil Treatments on Selected Nigerian Wood Species
2016 - IRG/WP 16-30689
Termites attack has been a major threat to wood materials in construction. The study investigated the termiticidal effect of bitumen and creosote oil mixture on the resistance of some commonly used indigenous wood species namely: Celtis zenkeri, Terminalia ivorensis, Albizia lebbeck, Cola gigantea and Terminalia superba to termites in Akure, Ondo State, Nigeria. The wood species were obtained from...
Owoyemi J. M., Adiji A. O., Aladejana J. T., Olawale O. E., Oladapo O. D.
Effects of Bio-oil Obtained from Laurel (Laurus nobilis) Residues on Biological, Physical, and Mechanical Properties of Treated Wood
2016 - IRG/WP 16-30692
In this study, the effects of bio-oil obtained from Laurel (Laurus nobilis) residues on biological (decay, insect, termite resistance), physical (water absorption, tangential and radial swelling), and mechanical properties (MOE, MOR and CSPG) of treated wood samples were studied. The bio-oil used in this paper was produced by the help of fixed bed reactor type pyrolyzer. GC/MS analysis showed that...
S Akbas, A Temiz, N Terziev, M H Alma, S Palanti, E Feci
Wood properties modification by an enzymatic assisted treatment with phenolic extractives
2016 - IRG/WP 16-30696
Extractives of sawdust and bark from P. pinaster and, condensed tannins (CTs) from P. radiata bark were used to treat beech and pine veneers in combination with an oxidative enzyme, in order to stably graft such extractives onto the veneers. First, the antifungal activity of P. pinaster phenolic extractives against wood decay fungi was studied. These extractives were also used to hydrophobize pi...
D Filgueira, C Fernández-Costas, D E García, D Moldes
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
Investigation of enzymatic effect on pit membranes by light and scanning electron microscopy
2016 - IRG/WP 16-40721
Spruce wood, one of the refractory wood species has pit membranes, which has an influence on the permeability of wood providing liquid flow between the wood cells. However, these membranes tend to close under the fiber saturated point (FSD), which makes impregnation more difficult. In this study spruce sapwood samples were treated with two different commercial enzymes to improve the permeability o...
S Durmaz, Ü C Yildiz, M Öztürk, B Serdar