Your search resulted in 912 documents. Displaying 25 entries per page.
Relationship between coating properties and their performance on treated wooden decks
2008 - IRG/WP 08-30454
Preservative treated wood benefits from the application of a surface coating to protect it from weathering (UV and rain). Different preservative formulations may affect surface properties of treated wood differently; therefore compatibility of coatings with different preservative treated wood types should be considered. This paper examines coatings characteristics and their weathering performance ...
M Ahmadinejad, P A Cooper
Above Ground Field Testing – Influence of test method and location on the relative performance of various preservative systems
2008 - IRG/WP 08-20393
Standardized above ground tests such as the lap-joint or test deck methods can be very slow in producing useful information on the relative performance of wood preservative systems. It often requires many years for decay to develop in wood treated to sub-optimal concentrations of standardized preservatives, making relative comparisons of performance between new systems and established preservativ...
A Zahora
Biological Performance of micronized copper wood preservative formulations in field and laboratory tests
2008 - IRG/WP 08-30488
Micronized Copper wood preservative formulations with different co-biocides were exposed to brown rot fungi in an 8-week AWPA E10 soil block decay test and two AWPA E7 ground-contact decay tests in Hawaii. The micronized copper formulations performed well against decay at or above the AWPA UC3 and UC4 retentions stipulated by the ICC-ES. Micronized copper preservatives performed comparably to a ...
G M Larkin, J Zhang, D L Richter, R J Ziobro, P E Laks
Micronized Copper Preservative Systems: Observations on the Release of Cupric ion (Cu2+) from Treated Wood and Performance against Wood Decay Fungi
2009 - IRG/WP 09-30519
In an attempt to address the mechanism of action of micronized copper preservatives, a 20-week continuous water leaching study was conducted. The leaching results indicated that, once impregnated in wood, micronized copper preservatives continuously release cupric ion, and the levels of cupric ion released from micronized copper treated wood are higher than those released from CCA treated wood, a...
J Zhang, R Ziobro
The Relative Performance of an Organic Preservative System under UC3A and UC3B Conditions using Two Test Methods
2010 - IRG/WP 10-20429
Coated L-joints have been used for decades to evaluate the performance of wood preservatives in protected environments. This study was conducted using matched coated and uncoated L-joints to simulate above ground protected and unprotect exposures. When exposed to constant moisture in a greenhouse environment, coated and uncoated L-joints give very similar performance results. In contrast, exposi...
C F Schauwecker, A Zahora, A F Preston
Effect of preservative treatment on mechanical performance of round and square poles made of small diameter Scots pine
2012 - IRG/WP 12-40612
A growing proportion of harvested Scots pine (Pinus sylvestris L.) timber originates from the first or second commercial thinning stands. There is a need to find economically viable and high quality wood products that can be manufactured from this raw material. Small log volume means not only demands of increased efficiency for material handling in logistics and manufacturing processes, but also c...
V Möttönen, R Stöd, K Heikkilä, H Heräjärvi
Performance of untreated wood and wood impregnated with copper-ethanolamine based preservative solutions in Northern Adriatic Sea
2013 - IRG/WP 13-30623
Sea water applications of wood are among the most challenging ones. Impregnated wood is exposed to leaching and to variety of marine borers, Limnoria sp. and Teredo sp. being the most important. In the present research, durability of pine wood impregnated with copper-amine based preservative solution (Silvanolin) of different concentrations, exposed to the sea water, was investigated according to ...
M Humar, M Petrič, J Adamek, B Lesar
Performance of biocide-free preservative-protective systems modified with organosilicon compounds
2013 - IRG/WP 13-30628
The objective of the research was to determine the influence of organosilicon compounds in preservative-protective systems on the selected properties of pine wood aimed for outdoor use. The investigations were made for biocide-free systems based on alkyd resin and natural oils modified with alkylalkoxy-, amino- and glycidoxysilanes. The special attention was paid on the influence of hydrophobic pr...
B Mazela, P Hochmańska, T Krystofiak
Ammoniacal Copper Zinc Arsenate Preservative Treated Wood Ties Their Performance in Testing and Track
2014 - IRG/WP 14-30636
While not a new preservative system, Ammoniacal Copper Zinc Arsenate (ACZA), had not previously been used to protect crossties. Its performance in treating difficult or refractory species of wood has been documented through its wide range of uses approved in AWPA. The establishment of appropriate testing for railroad material use was put in place and includes laboratory, field as well as commercia...
T Carey
Building solid foundations to support market growth of preserved wood in the UK – treatment quality, product approval and the largest national field trial of preservative treated wood in 50 years
2015 - IRG/WP 15-30662
The Wood Protection Association (WPA) has just commissioned Britain’s largest ever durability trial of home grown timber, having contracted Building Research Establishment (BRE) to conduct a long term controlled field trial of sawn and pressure treated British Softwood posts at two sites with differing soil conditions. This large scale Field Trial is the last of an innovative and substantial thr...
E Suttie, G Ewbank
Study on Nailed Joint with Iron Contamination. Part1: Shear Performance of Nailed Joint with Iron Contamination
2019 - IRG/WP 19-50349
In Japan, The building standard law was amended in 2000.1) The use of metal joint was obligated by this law. Since then, metal joints have been largely used for wooden buildings. Also, Act on the Promotion of Popularization of Long-life Quality Housing was enacted in 2009 and leaving Long-life Quality Housing has been focused on2). However, leaving houses to posterity for a long time causes severa...
R Nakano, D Nakano, H Ishiyama
Service trial of different materials exposed in jetties at Öresund. Progress report No. 5
2022 - IRG/WP 22-30764
This report contains results of the fifth inspection on the performance of different decking materials – preservative-treated wood, modified wood, natural durable wood, re-cycled plastics and wood-plastic composites (WPCs) - available on the market and exposed since 2013 (some since 2014 and 2016) by the City of Malmö in two jetties near the Øresund Bridge, south of central Malmö in Sweden. T...
J Jermer
Effect of Moisture Cycles and Timber Treatment on the Performance of Screwed Connections
2023 - IRG/WP 23-20694
The impact of moisture in timber structures is associated with the deterioration of timber, and loss of mechanical performance. Methods have been developed to treat timber using chemicals to inhibit deterioration, however, water intrusion has much more immediate effects on the mechanical properties of timber associated with swelling and shrinkage of the wood. The effects of moisture on the mechani...
L Yermán, M Xiao, Z Yan, L-M Ottenhaus
Performance of a noise barrier with different wood materials – results from a service trial after 25 years of exposure
2023 - IRG/WP 23-30776
In connection with the construction of the railway connection between Stockholm Arlanda airport and Stockholm city, an 11 km long noise barrier made of untreated European larch was built along the railway line. This provided an opportunity to implement a full-scale study comparing different untreated wood species and preservative treatments. Thus, in March 1996 ten test sections including untreate...
J Jermer, M Westin
Long-term field performance of a carbon-based preservative in ground contact test conditions
2023 - IRG/WP 23-30781
Carbon-based preservatives have demonstrated reasonable long-term field performance in above ground testing. This study examines the performance of a carbon-based preservative formulation containing quaternary ammonium compounds and tebuconazole as a treatment for three softwood species exposed in ground contact at two sites in Canada. The treatment was associated with improved decay resistance an...
C Wilson, J Zhang, R Stirling
Confocal laser scanning microscopy of a novel decay in preservative treated radiata pine in wet acidic soils
1997 - IRG/WP 97-10215
Light microscopy of radiata pine (Pinus radiata D. Don) field test stakes (20x20x500mm3) exposed in wet acidic (pH 3-4) soil for 12 - 24 months showed predominance of an unusual type of decay characte-rised by tunnelling attack of wood cell walls. After two years decay was moderate to severe in wood treated to ground contact CCA specifications and also equivalent retentions of creosote, and a numb...
R N Wakeling, Ying Xiao, A P Singh
Proposed method for out-of-ground contact trials of exterior joinery protection systems
1981 - IRG/WP 2157
Methods for testing the efficacy of preservative treatments for exterior joinery are described using the format of a European Standard. Commercially used treatments applied to jointed test units (L-joints) which are then protected by conventional finishes are exposed to normal outdoor hazards out of ground contact. Assessment is made a) by determining eventual failure through decay and b) by destr...
J K Carey, D F Purslow, J G Savory
Status of the research and development of a new preservative system (EFPL) for pressure treatment of spruce in Canada
1975 - IRG/WP 348
Our work has been to develop a system which would have the stability of the ACA system and the formulation flexibility of the CCA system enabling properties such as fixation of arsenic, water repellency, appearance and cost to be controlled. Our permeability studies of spruce using a method previously developed indicated that an ammoniacal solution of copper arsenate is an excellent candidate for ...
J Rak, M R Clarke
Manual of a mini treating plant for waterborne preservative treatment of timber and bamboo
1999 - IRG/WP 99-40130
This contributional article includes machinaries and equipments necessary for a small wood treating plant for the pressure treatment of tim bers with waterborne preservatives along with the cost and design. The preservative treatment limitations, treatment schedules and specifications for different products have been described. The cost of a mini treating plant will be 6,00,000 Tk. (13,000 US$), s...
A K Lahiry
Performance of treated fence posts after 6 years in five test plots in the State of Sao Paulo - Brazil
1976 - IRG/WP 376
Fence posts treated with creosote, pentachlorophenol and creosote/ pentachlorophenol mixtures showed good performance after 6 years of exposure in five test plots located in the State of Sao Paulo - Brazil. Good results were also achieved with copper sulphate/sodium arsenate and copper sulphate/potassium dichromate mixtures. Fungi and termites were the main destroying agents found attacking the po...
M S Cavalcante
Testing of wood preservatives against marine borers (Part 1). Method of testing wood preservatives against marine borers (Part 2)
1971 - IRG/WP 37
P C Trussell, C C Walden
Improved techniques designed for evaluation of fungicides in soil for control of dry rot fungus Serpula lacrymans
1985 - IRG/WP 2238
Improved techniques provide a laboratory method for the evaluation of chemicals in soil for control of dry rot fungus Serpula lacrymans. Results with their application to three chemicals were reported. These techniques are useful to eliminate chemicals lacking the necessary toxicity and weatherbility for dry rot control when the chemicals have been applied to the soil....
M Takahashi, K Nishimoto
Collaborative soft rot tests: PRL tests of Cu/Cr/As preservative using method of Document No: IRG/WP/208
1973 - IRG/WP 223
These tests were undertaken as a preliminary to the next series of collaborative soft rot tests. An interim report has already been presented at Berlin in 1972 as Document No: IRG/WP/211...
J K Carey, J G Savory
Registration and approval of wood preservatives in Australia and New Zealand
2001 - IRG/WP 01-50166-06
Wood preservatives are treated as agricultural chemicals in Australia and, at the time of writing, as pesticides in New Zealand. Antisapstain products are currently considered to be agricultural chemicals in New Zealand while wood preservatives in the future will be considered as hazardous substances under the Hazardous Substances and New Organisms Act when this Act is fully implemented. They are ...
H Greaves
How to Document the Performance of Super-Critical Treated Wood in above Ground Situations?
2005 - IRG/WP 05-20316
The paper presents practical experiences from the preparation of a new preservative treated wood product for introduction to the market. The product in question is Superwood™, which is treated with organic biocides using CO2 in a supercritical state as a solvent.
The question is how to evaluate the performance of a new product such as Superwood™ in order to get an acceptance on the market a...
N Morsing, A H H Wong, F Imsgard, O Henriksen