Your search resulted in 274 documents. Displaying 25 entries per page.
Three-year field test of preservative-treated Canadian species in Korea
2014 - IRG/WP 14-30646
The purpose of this study was to generate field performance data in Korea on Canadian softwood species preservative-treated to Canadian standards. Two field tests of preservative-treated Canadian softwood species, one in ground contact and one above ground, were installed in Jinju, Korea in November 2010. Western hemlock and white spruce were incised and pressure-treated with alkaline copper quate...
Jieying Wang, Jong Bum Ra, P I Morris
Field performance of wax treated wood
2014 - IRG/WP 14-30649
The durability and outdoor performance of wax treated Scots pine sapwood was investigated in above ground field tests. Therefore wood impregnated with three different waxes was exposed in horizontal lap-joint test which is running since eight years. Durability, wetting resistance and the susceptibility to checking has been investigated. In summary, all wax treated wood performed better compared to...
C Brischke, E Melcher
Borate Redistribution in Glulam in an Above Ground Field Test
2014 - IRG/WP 14-30652
Researchers have refocused on the use of boratesin the wood protection industry in the last two decades due to their broad spectrum effectiveness against fungi and insects, and favourable environmental characteristics. This study was designed to determine borate distribution in a limited number of samples from a large field test of composites protected by a combination of coating and borate treatm...
P I Morris, A Temiz, J Ingram
Effect of polyurea coatings on performance of Douglas-fir in tropical above ground exposures
2014 - IRG/WP 14-40665
The potential for using polyurea barriers to limit fungal and termite attack was investigated on Douglas-fir lumber and timbers. Termites were capable of penetrating the barrier to attack non-treated wood as well as wood dip-treated with disodium octaborate. The coatings were also exposed above ground for 48 months in Hilo Hawaii. Samples were dissected to detect internal decay. Coated non-trea...
S Uysal, J J Morrell
The Physical Properties of Heat Treated Fir Wood and Outdoor Durability
2014 - IRG/WP 14-40677
Wood might be easily susceptible to degrade by biotic and abiotic factors. Therefore, wood should be protected from fungi, insects and other degradation factors by applying treatment methods. Especially, for the wood have used in the external environment. Chemical treatment methods have some disadvantages such as use of toxic chemicals (Arsenic and chromium) and treatability of refractory wood spe...
O E Özkan, H Vurdu, A Temiz, G Köse
Above ground field testing: results of experiments in Brazil after one year
2015 - IRG/WP 15-30660
After the development of new products they need to be field-tested to assess their efficacy under diverse conditions of climate, comparing them with a preservative with proven efficacy. In some testing sites, decay occurs very slowly. The solution would be to bring these tests to locations that are conducive to biodeterioration, like tropical climates. Tropical sites provide higher temperature and...
M F Natale, J M Vidal
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
Moisture induced risk and fungal development in various field test set-ups in and above ground
2016 - IRG/WP 16-20577
A high number of studies on the decay performance of wood in outdoor exposure have been conducted in the past. However, no testing methodology for wooden components exposed above ground reflecting the variety of different loads has been established so far. Many test protocols were modified in different ways throughout the years and results were often published in an encoded or incomplete way. This...
L Meyer-Veltrup, C Brischke
Bundle tests - Simple alternatives to standard above ground field test methods
2016 - IRG/WP 16-20581
Within this study we applied different new above ground test set ups to untreated Norway spruce (Picea abies Karst.) and Scots pine sapwood (Pinus sylvestris L.) which are frequently used as reference or control species in wood durability field tests. The overall aim of this study was to find a simple alternative method to the few standardized above ground field test methods, such as the L-joint a...
C Brischke, L Meyer-Veltrup
Decay of wood in outdoor above ground applications: Preview of results on the effect of climate and species in Spain
2017 - IRG/WP 17-20600
Within the framework of the Project BIA-42434R titled ‘Evaluation of the functional performance of wood in outdoor above ground applications’, seven trials containing seven pieces of sawn wood measuring 750x100x20mm3, belonging to seven different wood species (Scots pine, Radiata pine, Laricio pine, sweet chestnut, eucalyptus, Thermo-treated radiata pine and Spruce), were exposed to unprotecte...
J I Fernández-Golfin Seco, M Conde García, M R Diez Barra, M Conde García, L Acuña Rello, E Torres Álvarez, E Perea Alonso, M T Troya
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
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
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
Comparative studies on the durability of English oak (Quercus robur L.) under in-service, field and laboratory conditions
2017 - IRG/WP 17-10881
The durability of many wood species varies due to differences in extractive content, anatomical features, growth conditions, and not at least in dependence of the respective exposure conditions either under test or in real life applications. And so does the durability of English oak (Quercus robur L.), which has recently been considered in the revised European standard EN 350 (2016) and is now cla...
C Brischke, L Meyer-Veltrup, A Soetbeer, M Höpken, E Melcher, J Trautner
Bio-deterioration of Southern Pine Stakes at Geographically Different Testing Sites
2017 - IRG/WP 17-20609
Southern pine (SP) sapwood is commonly used in preparing the standardized stakes for performance testing as referenced in the American Wood Protection Association (AWPA) Book of Standards. For example, the standardized above ground test methods E16/E18 and the standardized ground contact test method E7 all use sapwood of SP as the preferred wood species for preservative performance test. In this...
Jun Zhang, J Horton
Decay resistance of beams made from thermally modified Scots pine and Norway spruce after 6 years’ exposure in ground contact
2017 - IRG/WP 17-40806
In the present study the resistance of beams treated by ThermoWood® process was studied in ground contact and the results given are based on a “modified” EN 252 test. After six years’ exposure clear differences were found between untreated Scots pine and Norway spruce beams and treated ones. In all cases thermal modification improved the performance. Thermally modified pine heartwood showed...
S Metsä-Kortelainen, H Viitanen
Evaluation of coating applied in treated wood: experiences in Brazil
2017 - IRG/WP 17-40814
Weathering assays study the coating degradation caused by its exposure to the action of ultraviolet radiation, winds, heat and humidity. The use of test specimens in different arrangements and exposure angles is intended to reproduce various conditions in which a product can be used. The purpose of this paper is to present the efficacy of an oil-borne varnish applied on treated wood exposed to wea...
M F Natale, J M Vidal
Long-time efficacy of some soil termiticides tested according to “Modified Ground Board Test”
2018 - IRG/WP 18-10935
Field trials of efficacy of soil termiticides available in Thailand were started back in the 1980s at four different locations representing different unique weather types of the country. The method used in the trials (Modified Ground Board Test) is the compulsory test for every soil termiticides aiming to be registered for termite control in Thailand. The ongoing record reveals that some particula...
C Vongkaluang, K Charoenkrung, N Same Rain
Testing the durability of timber products above ground using the block-test method – A critical review
2018 - IRG/WP 18-20637
The block-test method for testing the durability of wood and wood products above ground is reviewed critically with respect to practical aspects, moisture loads, corresponding decay development, and the possibilities of assessing test specimens by determining the dynamic modulus of elasticity (MOEdyn) of wood. In total, 36 blocks representing different modifications of the original set-up and a wi...
C Brischke, A Gellerich, H Militz
Can CCA be substituted as reference preservative?
2018 - IRG/WP 18-20641
While field testing of wood protective formulations remains probably the best method to find out the effective preservative concentration, the use of chrome-copper arsenate (CCA) as reference becomes debatable due to environmental and legislative reasons. This emerges from the European standardization bodies who have discussed reference alternatives that can omit the use of CCA. The present debate...
N Terziev, M Jebrane, P Larsson Brelid, N Morsing, P-O Flaete, P Torniainen, J S Kim, G Daniel
Long-term performance of DMDHEU-treated wood exposed in ground, above ground and in the marine environment
2018 - IRG/WP 18-40825
Chemical wood modification with N-methylol compounds such as 1.3-dimethylol-4.5-dihydroxyethyleneurea (DMDHEU) has been studied intensively since the 1990s. Research of the past years focused on treatment of Scots pine (Pinus sylvestris L.) and European beech wood (Fagus sylvatica L.) and was shown to be applicable to improve specific material properties. A high resistance against wood-destroying ...
L Emmerich, H Militz, C Brischke
Performance of wood exterior structures above ground in Spain built with softwood species. The situation case of a shelter bridge
2018 - IRG/WP 18-40844
Across Europe is very common to find wood exterior structures build in sawn and glue-laminated wood. Most of these exterior wood structures use softwood wood species such as: fir, spruce, larch and pine. In Spain exterior wood structures, became more and more popular since nineties, when sawn and glue-laminated wood were utilized for building exterior wood structures in overall Spain. This paper s...
D Lorenzo, M Touza, J Fernández-Golfín, A Lozano, J Benito
Identifying the fungal community on western redcedar (Thuja plicata) wood in field tests above and in ground contact exposure: preliminary results
2019 - IRG/WP 19-10939
Western redcedar (Thuja plicata) is a high value species in the Canadian forest industry due in large part to the natural durability of its heartwood. Western redcedar heartwood contains extractives that are inhibitory to the growth of many fungi responsible for decay. In order to gain insights into which extractives are important in long term durability, and which fungi are important to decay of ...
A Dale, S Kus, R Stirling
Performance of untreated timbers in above ground decking tests: Preliminary results from an international collaborative trial
2019 - IRG/WP 19-10940
The ability to accurately predict wood decay risks under varying environmental conditions has long been of interest to timber users. Accurate predictions are difficult owing to the myriad of variables associated with the decay process including wood species, wood inhabiting organisms, timber building element design and environmental conditions. Despite these difficulties, decay predictions have be...
L P Francis, J Norton, E Melcher, A H H Wong, J Kok Lai, M Klamer, M J Konkler, J J. Morrell
Diversity of wood decay fungi isolated from ground-contact wood stakes in Korea
2019 - IRG/WP 19-10952
This study was conducted to investigate wood decay fungi from 5 different ground-contact wood stakes in Korea. A total of 73 basidiomycetes were isolated and identified into 20 genera and 22 species by using molecular method. Among all fungi, only 6 species were brown-rot fungi and the others were white-rot fungi. Pinus densiflora and Quercus variabilis showed high fungal diversity and isolation f...
S-M Yoon, M-J Kim, W-J Hwang, Y-S Choi, D-W Son