Your search resulted in 265 documents. Displaying 25 entries per page.
Enhancing the Performance of Transparent Coatings by UV Protective Pre-treatments
2006 - IRG/WP 06-30399
Most industry observers anticipate a change from copper-based preservatives to metal-free combinations of organics for residential treated wood products in North America within the next one to five years. While the chromium copper provide considerable protection against UV, metal-free formulations will need UV protection in the form of additives or coatings. While transparent coatings can be made ...
P I Morris, S McFarling
Laboratory bioassay and field trial on imidacloprid and cypermethrin as glueline treatments for softwood plywood
2006 - IRG/WP 06-30405
The effectiveness of imidacloprid and cypermethrin as glueline treatments for protecting phenol formaldehyde (PF)-bonded Pinus radiata (radiata pine) plywood from attack by subterranean termites was evaluated both in the laboratory and field. Imidacloprid was evaluated in two plywood constructions (19 ply x 1.6 mm-thick veneers and 5 ply x 3.2 mm-thick veneers) whereas cypermethrin was evaluated i...
J W Creffield, D K Scown
Paintability and gluability of wood treated with arsenic-free and chromium free preservative treatments
2006 - IRG/WP 06-40342
The objective of this project was to study, in comparison with traditional CCA treatment, the paintability and gluability of wood treated with arsenic-free and chromium-free preservative treatments.
Four formulations, all certified CTB P+, were selected in accordance with their representativeness of the preservative product market: one CCA reference formulation and three chromium and arsenic free...
L Podgorski, G Legrand
Surface and system treatments of wood for outdoor use
2006 - IRG/WP 06-30412
The project “Surface and system treatment of wood for outdoor use” was initiated the summer 2001. The project evaluates environmentally friendly preservatives and water borne coating systems, to find the best protection for timber indented for outdoor use. The wood species selected as test material were pine and spruce. The different treatments were exposed in several outdoor accelerated tests...
B Jacobsen, F G Evans
Assessment of the Envelope Effect of Three Hot Oil Treatments: Resistance to Decay by Coniophora puteana and Postia placenta
2006 - IRG/WP 06-40344
Timber of Corsican pine (Pinus nigra var. maritima) and Norway spruce (Picea abies) was treated in hot linseed oil, rapeseed oil and a proprietary resin derived from linseed oil. The samples were immersed in oil or resin under reduced pressure at temperatures of 180°C and 200°C. Very high uptakes of the oils or resin were recorded for pine, while spruce showed lower weight percent gains, below...
M J Spear, C A S Hill, S F Curling, D Jones, M D C Hale
Laboratory Leaching Tests to Study the Effects of Post-Treatment Storage Periods on CCA Leachability and Fixation in Treated Permeable and Refractory Malaysian Hardwoods
2006 - IRG/WP 06-50240
The biological resistance and environmental safety of CCA-treated wood relies on the extent of post-treatment storage fixation of CCA in wood prior to being utilized. A study on the comparative leachability (fixation) of CCA-treated refractory and permeable heartwoods of 3 Malaysian hardwoods subjected to different post-treatment storage (fixation) periods of up to 4 weeks, at 2 laboratory leachin...
A H H Wong, H C Lai, N P T Lim
Effects of heat treatments on decay resistance and material properties of ponderosa pine and yellow poplar
2007 - IRG/WP 07-40374
The potential for using heat treatment to improve the properties of North American fenestration species was evaluated on ponderosa pine (Pinus ponderosa L) and yellow poplar (Liriodendron tulipifera L) treated using the ThermoWood process at various treatment temperatures and times. Soil block tests using Gloeophyllum trabeum, Postia placenta, or Trametes versicolor showed that durability was enh...
C Vidrine, C Freitag, J Nicholson, J J Morrell
Preventing the introduction of Xylosandrus crassiusculus by dipping green lumber in insecticides prior to shipment
2007 - IRG/WP 07-40370
Xylosandrus crassiusculus, an ambrosia beetle native to Asia and Africa, was introduced into the southeastern United States in 1974. Since that time, this species has substantially expanded its range, causing damage to native ecosystems and healthy nursery stock. This species was found in The Dalles, Oregon in 2004, indicating that it is not limited to sub-tropical environments. This introducti...
C F Schauwecker, R F Mizell III, J J Morrell
Comparative Laboratory Leaching Test Methods to Study Post-Treatment Storage Period Impacts on CCA Leachability and Fixation in Treated Kempas (Koompassia malaccensis) Heartwood
2007 - IRG/WP 07-20376
Three laboratory leaching test methods were compared to determine the effects of different post-treatment storage fixation periods on leachability/fixation of CCA components from treated kempas (Koompassia malaccensis) permeable heartwood. End-sealed test wood blocks of permeable were treated with CCA to target retention of 5.6 kg/m3, immediately stored to fix at ambient conditions for 0 and 48 ho...
A H H Wong, H C Lai
Preventing Xylosandrus crassiusculus Beetle Attack in Large Green Timbers Using Pyrethroid Dip Treatments
2008 - IRG/WP 08-10642
Although awareness about the risk of invasive species has increased over the past decade, a large number of highly destructive exotic pests are still being introduced around the world. One of the more important pest introductions in the Southeastern United States has been the Asian ambrosia beetle, Xylosandrus crassiusculus. This species is particularly important
because of its ability to kill...
C Schauwecker, A F Preston, J J Morrell
The effect of treatments in boron steaming medium on boron leaching and strength properties of wood
2008 - IRG/WP 08-40409
The combined effect of boric acid impregnation together with boron steaming and steaming heat treatments were evaluated in this study. Boric acid pre-treated wood samples and untreated ones subjected to steaming heat and direct steaming treatment in a close reactor at 13 bar pressure and 180 ºC for 30 minutes. Compression strength parallel to grain of wood samples, leaching test and pH measuremen...
E D Tomak, Ü C Yildiz, S Yildiz, E Pesman
Opportunities and Needs with Treatments for the Protection of Plantation Species
2008 - IRG/WP 08-40438
The future of the wood treating industry lies increasingly on the treatment of wood derived from plantation forests. Plantation softwoods and hardwoods both provide significant opportunity for utilization coupled with protection technologies, but development programs will require much more focus and funding than is currently available. Manufacturing and treating of products from plantation fores...
A F Preston
Service Life Prediction of Wood Claddings by in-situ Measurement of Wood Moisture Content: Status after 5 years of Outdoor Exposure
2009 - IRG/WP 09-20401
The Danish Technological Institute is in co-operation with industry partners running a project aiming at predicting the service life of different wood protecting systems. The project focuses on examining the moisture reducing effect of different protecting systems for timber claddings and the ability of these to maintain the appearance of the surfaces, when the wood is used in service class 3 (EN ...
E Tang Engelund, B Lindegaard, N Morsing
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
Laboratory and above ground exposure efficacy of silicon-boron treatments
2009 - IRG/WP 09-30510
The study deals with silicon compounds, namely tetraethoxysilane (TEOS), phenyltriethoxysilane (PhTES) and methyltriethoxysilane (MTES) at concentrations of 23, 16 and 10% in combination with 1.2-1.5% boric acid. The aim with the study was to combine the chemical approach with the necessary biological tests of the impregnated wood. The tested silicon-boron combinations ensured mass loss less than ...
N Terziev, D Panov, A Temiz, S Palanti, E Feci, G Daniel
Leaching of the copper component from full scale decking boards during one summer season
2009 - IRG/WP 09-50260
The leaching of copper has been tested in laboratory and in outside exposure for freshly treated pine sapwood samples with three different copper preservatives, Cu HDO, copper quat and copper triazoles. We found in the laboratory leaching test that a fixation with warming to 60 °C (140 °F) for 48 hours without drying and then drying in the laboratory in room temperature gave the lowest leaching of copper. We also found that surface treatments with wood oils reduced the leaching, and that washing of the surface before testing had no effect.
Full scale decking board samples (0.25 m2) were then exposed outdoors for rain. The rain water was collected and analysed for copper. After one summer season (about 600 mm rain) we found that the leaching differ for the three preservatives. All samples with a water borne surface treatment had the lowest leaching, about half the amount of untreated.
F G Evans
Service life prediction of wooden components – Part 2: Impact of material, exposure and design details
2010 - IRG/WP 10-20440
Dose-response functions permit to estimate the moisture and temperature induced decay potential for any wooden building component and exposure, and thus the service life to be expected. In part 1 of this series dose-response functions were established as a result of double layer field trials carried out at 24 European test sites over up to eight years. Using them makes it no longer necessary to co...
C Brischke, B Lauenstein, M Bilstein, T Bornemann, A O Rapp
Phytosanitary standards and the potential for acceptance of chemical treatments as a phytosanitary measure
2011 - IRG/WP 11-30558
Regulations governing international trade in forest products must balance the economic and social benefits of trade with the potential risks of transporting invasive species. The International Plant Protection Convention (IPPC) is an international agreement intended to manage this process. It develops international phytosanitary standards (ISPMs) that are recognised by the World Trade Organisation...
A Uzunovic, R Stirling, J J Morrell, P I Morris, C F Schauwecker
Novel Approaches to the Development and Testing of Anti After-glow Additives for CCA-based Treatments of Poles
2011 - IRG/WP 11-30561
In this paper, a field fire stake testing screen method is described. This method uses stake samples from matched wood sources allowing replicates from different boards to be included. The method is easy to control and can provide quick comparative fire resistance test results. The parameters measured from the tests are percentage weight loss, minimum residual circumference and residual thicknes...
L Jin, P Walcheski, A Preston
Inhibition of Basidiospore Germination by Copper from MCQ, ACQ and CCA Leachates
2012 - IRG/WP 12-10778
The long-term decay resistance of refractory wood shell-treated with chromated copper arsenate (CCA) in above-ground exposures has been attributed to mobile copper that migrates into checks and inhibits the germination of basidiospores. Copper from micronized copper quat (MCQ) has also been shown to migrate into checks suggesting similar performance as a shell treatment, but questions have been ra...
R Stirling, J Drummond, P I Morris
Post-Manufacture Biocide Treatment of Engineered Wood I-Joists
2012 - IRG/WP 12-40596
Engineered wood I-joists, fabricated from laminated veneer lumber (LVL) flanges and oriented strand board (OSB) webs, offer many advantages over solid sawn lumber joists in residential and light commercial construction. With the expanded use of these products has come an increasing need to be able to treat them with biocides to prevent attack from decay fungi and termites during service. Historic...
A S Ross, R W Clawson
KERUING and APITONG: A Timely Review of the Perfect Choice Wood Species for Crossarms and Brace Arms, Including Data on Copper Naphthenate Treatments
2012 - IRG/WP 12-40603
Apitong or the wood species more commonly known as Keruing is an important tropical hardwood known for its high strength to weight ratio and its reasonable durability and preservative treatability. This wood has been exported from managed permanent forest estates in Malaysia into the United States for over 4 decades for its widespread use in wooden utility industry brace arms and crossarms, yet cu...
A Wong, M Freeman
Liquefaction - a functional way to manage CCB containing post-consumed wood?
2012 - IRG/WP 12-50288
The need for increased use of renewable resources put quite some attention to liquefaction of biomass, including wood. Several possible applications of liquefied wood as an alternative to petroleum based derivatives have been considered in recent years. In this paper, possibilities of wood liquefaction to manage post-consumed CCB (copper, chromium, boron) containing wood are considered, with a foc...
M Petrič, F Budija, D Hrastnik, M Humar, B Lesar
An assessment of soft rot in preservative-treated poles in two test sites and two network areas in New South Wales
2013 - IRG/WP 13-10801
This document presents an extended summary of recent investigations into soft rot attack of preservative treated power poles from the re-inspection of samples selected from two field sites and two in-service trials located in New South Wales, Australia. The in-ground sapwood of selected poles was assessed by probing and, after core sampling, by microscopy to determine the severity and extent of s...
W D Gardner, M A Powell, C Kirton
System treatments of Pinus sylvestris - influence on moisture, decay and discoloration
2013 - IRG/WP 13-30612
Biological activity can cause challenges for the use of wood in outdoor exposure. Decay and discolouring fungi influence the service life of wooden constructions, and the moisture content of the wood is often an important factor. The aim of this study was to evaluate the performance of different combinations of preservative/modified wood protection treatments and surface treatments for wooden deck...
A Schabacker, G Alfredsen, L Ross Gobakken, H Militz, P O Flæte