Your search resulted in 1646 documents. Displaying 25 entries per page.
Using Commercial Water Repellent Chemicals on Wood Protection
2014 - IRG/WP 14-30656
Lately, researchers have been looking for process and products that use environmental friendly technologies in wood protection. These sorts of innovations on wood protection should be carried out for wood evaluated at outdoor conditions. Using water repelling chemicals is one of those innovations which improve wood durability and dimensional stability by decreasing content of moisture.
In this ...
G Köse, A Temiz, S Demirel, O E Özkan
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
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
Development of new wood treatments combining boron impregnation and thermo modification - Effect on decay and termites durability
2014 - IRG/WP 14-40666
Environmental pressures appeared in most European countries during the last decade has lead to the development of more environmentally acceptable preservation methods. In this context, wood heat treatment has been one of the most investigated alternative methods during the last years. Treated at temperatures ranging between 180 and 220°C, wood components undergo more or less important chemical mo...
S Salman, A Pétrissans, M-F Thévenon, S Dumarçay, B Pollier, P Gérardin
Comparison of untreated plywood and untreated LVL in a field trial against Coptotermes acinaciformis and in laboratory trials against Tyromyces palustris and Coniophora puteana
2014 - IRG/WP 14-40671
In Australasia, efficacy data obtained on plywood is generally acceptable for laminated veneer lumber (LVL) and vice versa. This is particularly the case with glueline treatment approvals. The rationale is that the two wood products have predominately the same basic structure with the key difference being orientation of the veneer. LVL typically has all veneers in parallel while plywood typical...
A Siraa, K Day, S Millward, P Lobb
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
Borate treatment of green ties: An initial report on the effects on mechanical properties
2014 - IRG/WP 14-40686
Borates are increasingly used as components of wood preservative systems for railway cross ties (“sleepers”) in the USA. A variety of methods exist for incorporating the borate component; however, the so-called ‘two-step’ treatment, which involves treating the green tie in borate, followed by a pressure treatment with creosote or copper naphthenate after drying (‘seasoning’), offers th...
A M Taylor, J D Lloyd
Laboratory Study of Relative Leachability of Chromated Copper Arsenate Preservative from Treated Woods among Soil Types of Sarawak
2014 - IRG/WP 14-50307
Wood and soils are important natural resources from the environment and serves mankind well respectively as structural materials and natural platform erecting such materials. With shortfalls of naturally durable timber species for protected in-ground uses under Malaysian environments, Chromated Copper Arsenate (CCA) treated woods are widely used instead, incurring serious potential threats of pres...
A H H Wong, P K F Chong
Influence of the moon phase on durability against wood decay fungi of Larix kaempferi and Pseudotsuga menziesii wood species
2015 - IRG/WP 15-10836
The analysis of the natural durability of wood is essential when establishing the level of protection required, depending on the designated end use of timber. On the other hand, there is a popular belief based on the influence of the moon phase in felling timber, recommending the waning moon as the optimum for felling trees. In fact, some companies now offer among their products, sawn timber felle...
M T Troya, M Conde, M J Barriola, F Llinares, V Dorronsoro
Interpretation of moisture monitoring data - Relevance of moisture content thresholds for fungal decay
2015 - IRG/WP 15-10839
It is widely accepted that besides temperature wood moisture content (MC) is the key factor when it comes to durability of wooden structures exposed to weathering. Many approaches to predict the service life of wooden structures have therefore been based on using wood MC as one major input-variable to develop dose-response relationships between material climate and decay response. However, to impr...
L Meyer, C Brischke
Short-term protection of palm wood against moulds and decay fungi by environment-friendly organic acids
2015 - IRG/WP 15-10843
Felled palm trunks are susceptible to fungi as long as their moisture content is above fibre saturation. During this period, it has to be protected against moulds and decay fungi. The study tested environmental-friendly organic acids for their protecting efficiency. Small samples of Date palm (Phoenix dactylifera) and Oil palm (Elaeis guineensis) wood were treated with weak organic acids and subse...
M Bahmani, O Schmidt
An update on durability of New Zealand grown timber
2015 - IRG/WP 15-10851
Classification and predication of in-service performances of naturally durable timber is much more difficult than preservative treated timber due to the variability of wood properties within and between trees of the same species and the variable nature of the hazard to which the timber will be exposed. A combination of field test and in-service testing has been used to classify the suitability of ...
D Page, T Singh
Applicability of wood durability testing methods to bio-based building materials
2015 - IRG/WP 15-20561
It is well known that organic materials may be susceptible to attack from a range of fungal organisms and any bio-based material used in locations where there is the possibility of microbiological activity must be expected to be able to withstand or prevent such attack. There are a wide range of test methods and standards in place to test susceptibility although most of these test individual compo...
S F Curling, B K Stefanowski, E Mansour, G A Ormondroyd
Durability of treated wood Corymbia torelliana and Eucalyptus grandis x Eucalyptus urophylla against subterranean termite
2015 - IRG/WP 15-20563
This work aimed to analyze the durability of woods against termite Nasutitermes corniger Motsch. Fence posts from this study were collected in Pinheiros, north of Espírito Santo state, Brazil. Used the Corymbia torelliana and Eucalyptus grandis x Eucalyptus urophylla species with 11 and 9 years, respectively and plant spacing of 3.00 x 2.00 m. Were used 72 samples from discs removed the 0.50 m of...
D Junior Verly Lopes, J Benigno Paes, P N de Medeiros Neto, G dos Santos Bobadilha
Introduction of the COST FP 1303 Cooperative Performance Test
2015 - IRG/WP 15-20567
COST Action FP 1303 “Performance of bio-based building materials” successfully started in October 2013 and an ambitious program was set up for the four year programme. COST Actions provide an excellent opportunity for collaborative research, e.g. in the frame of Round Robin tests. The idea of this respective test was to distribute a fairly simple test set up to as many places in Europe as poss...
M Humar, C Brischke, L Meyer, B Lesar, N Thaler, D Jones, S Bardage, C Belloncle, J Van den Bulcke, J M Abascal, G Alfredsen, D Baisch, B Brunnhuber, G Cofta, E Grodås, E Frühwald Hansson, M Irle, H Kallakas, J Kers, M Klamer, P Larsson Brelid, A B Maider, K C Mahnert, E Melcher, R Möller, M Noël, L Nunes, G A Ormondroyd, S Palanti, N Pfabigan, A Pilgård, A O Rapp, P Schumacher, E Suttie, T Teppand, M Touza, J Van Acker
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
Factors Affecting Performance of Preserved Wood Decking Against Decay Fungi
2015 - IRG/WP 15-30663
Decking is the largest market for residential preserved wood in the United States. Preserved decking must be resistant to colonization by decay fungi initiating from spores, and occasionally from mycelia due to elevated soil levels or adjacent untreated wood. The most vulnerable parts of a preserved wood deck are untreated, or under-treated, wood that becomes exposed by field cuts and checking. Fi...
R Stirling, P I Morris
Potential of teak heartwood extractives as a natural preservative against Nasutitermes corniger termite
2015 - IRG/WP 15-30666
Most low durability timber are treated with waterborne preservatives consisting of metallic salts, however, these substances make the process expensive and are harmful to man and the environment, requiring cares with handling, dosing and leaks. Due to these facts, several researches have shown the use of natural substances, extracted from the wood of various naturally durable species, as potential...
V Fassina Brocco, J Benigno Paes, L Gonçalves da Costa, S Brazolin
The effect of preservative treatment on mechanical strength and structural integrity of wood
2015 - IRG/WP 15-30667
The use of wood for demanding construction applications is increasing in Europe. Wooden constructions are frequently designed of susceptible conifer wood, which is endangered by wood decay fungi in wet applications. Therefore in many cases treating wood with preservatives is unavoidable to ensure the desired service life. However, chemical treatment of wood can result in changes of its mechanical ...
M Humar, D Kržišnik, C Brischke
Durability of Fence Posts of Four Wood Species After 20 Years in Field Test
2015 - IRG/WP 15-30670
In the past years, wood consumption from native forests has drastically reduced the availability of wood. Fast-growing species such as Pinus and Eucalyptus suitably impregnated with chemicals may show a service life equal or higher than hardwood with high natural durability. The field tests have been an alternative widely used to evaluate the durability of wood and the efficiency of preservatives....
A Florian da Costa, A C Salgado de Freitas, E Meneses Oliveira
Mould growth on spruce claddings and the effect of selected influencing factors after 4 years of outdoor testing
2015 - IRG/WP 15-30671
Norway spruce (Picea abies) is the most frequently chosen wood species as claddings in façades in Norway, and is used both coated and uncoated. The visual changes that occur during weathering can be colour changes, abrasion or wear, blistering, flaking, and even cracks in the wood or coating, but more often growth of mould and blue stain fungi is the main challenge. A field test with synchronous monitoring of relative humidity, air temperature, material temperature and wood moisture content in Norway spruce claddings has been performed in southern Norway as part of the ClimateLife project. Visual evaluation of blue stain and mould growth according to EN 927-3 was performed, and evaluation data after 46 months exposure is presented. The objectives were to study the effect of 1) environment, 2) cardinal direction and 3) colour of the coated surface on growth of blue stain and mould fungi and to study the variation in relative humidity, air temperature, wood moisture content and material temperature. After 46 months exposure, the red coating system had generally the lowest mould ratings and the uncoated claddings had the highest. Of the white coloured claddings the ones facing south had lower mould ratings than those facing north, but the opposite were found for red coloured claddings. The relative humidity was higher in front of claddings exposed northwards and in a shaded environment compared to an open environment against south. In an open environment red coloured claddings had the lowest wood moisture content and highest material temperature, and red coloured claddings against south had the highest maximum material temperature.
L Ross Gobakken, G I Vestøl
Antifungal properties of wood treated with IPBC and organosilicone compounds against Coniophora puteana
2015 - IRG/WP 15-30676
The aim of the research was to increase durability of Scots pine wood treated with 3-Iodo-2-propynyl butylcarbamate (IPBC) through organosilicon compounds. The IPBC was combined with organosilicon compounds (alkylsilane and alkylsilane with amino groups) for supporting its antifungal properties. The mycological examination against Coniophora puteana was performed to determine the resistance of woo...
W Perdoch, B Mazela, A Waśkiewicz
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
Some comments on durability testing of WPC according to EN 15534-1
2015 - IRG/WP 15-40695
The standard EN 15534-1 (2014) gives advice for broad characterization of WPC materials and products. It contains instructions for test procedures concerning different properties e.g. mechanical properties, thermal properties, as well as durability.
In this paper some WPC materials from the market were tested for their resistance against brown rot. Furthermore, the water uptake and bending prope...
S Bollmus, A Gellerich, H Militz