Your search resulted in 114 documents. Displaying 25 entries per page.
Development of a rapid screening method to determine the susceptibility to mould growth of novel construction and insulation products
2015 - IRG/WP 15-20562
Wood-based materials are commonly used in building construction/insulation as a replacement for solid timber. However, these materials are susceptible to microbiological growth and different environmental conditions influence the vulnerability of wood-based materials. Moulds are a common problem found within homes and cause aesthetic damage, health problems and can increase material vulnerability ...
B K Stefanowski, S F Curling, 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
Acceptance levels of surface disfigurement - tolerance to defects of coated wood
2015 - IRG/WP 15-20564
Service life planning (PSL) has become an important issue in performance based building and substantial progress has been made in recent years. The role of predicting the aesthetical service life of wooden building components has been underestimated for quite long time but is recently attracting more and more notice. It is influenced by numerous factors such as discoloration, fading, flaking, crac...
C Brischke, P Kaudewitz
The combined effect of wetting ability and durability on field performance – verification of a new prediction approach
2015 - IRG/WP 15-20565
Comprehensive approaches to predict performance of wood products are requested by international standards and the first attempts have been made in the frame of European research projects. However, there is still an immanent need for a methodology to implement the durability and moisture performance of wood in a performance classification system. The aim of this study was therefore to establish an ...
C Brischke, G Alfredsen, P-O Flæte, M Humar, T Isaksson, L Meyer
The potential of 2D NIR imaging for wood protection research
2015 - IRG/WP 15-20566
Investigating wood and wood-based materials using infrared spectroscopy has since long been explored. Recently, image-based systems have been developed that are used in food and pharmaceutical industries for rapid screening. Such hyperspectral cameras are able to collect spatial and spectral information simultaneously, resulting in a volume with a spectral profile for each pixel of the image. We p...
J Van den Bulcke, N Defoirdt, W Li, J Van Acker
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
Colonization of treated and untreated decking materials by bacteria, fungi and algae quantified by qPCR
2015 - IRG/WP 15-20568
The use of durable wood species for wood decking in outdoor applications, e.g. garden terrace (use class 3) is gaining more and more interest on the part of consumers and architects. To get detailed information on the practical use of deckings, a project was started in 2010. In total 71 different decking materials (0.03 m²) were installed and evaluated over 30 months. Beside other parameters, the...
E Stoyanova, B Schmöllerl, A Steitz, N Pfabigan, R Gründlinger
Interaction between Aspergillus niger fungus and other filamentous fungi on salt-agar medium and their growth on natural wood and wood treated with fungicide
2015 - IRG/WP 15-20569
Aspergillus niger (An) is very often used alone or in mixture with other filamentous fungi of the genus in testing biocides in disinfection procedures, safety, hygiene, medical fields as well as for testing resistance of wood and wood-based materials to moulds. Softwood species as well as hardwood are overgrown with An fungus very easily, causing drop of mainly the aesthetic value of wood product....
A Fojutowski, A Kropacz, A Koziróg
Non-destructive monitoring of structure and moisture dynamics of plywood exposed outdoors to improve service life prediction and fit-for-purpose design
2015 - IRG/WP 15-20570
Plywood is an important construction material yet prone to water uptake, which can decrease strength and increase decay risk. To predict service life and improve fit-for-purpose design, it is crucial to understand the moisture behavior and structural changes of plywood. In this research, several plywood specimens were exposed outdoors for approximately one year. During this period, the moisture di...
W Li, J Van den Bulcke, I De Windt, M Dierick, J Van Acker
Evaluation of color and gloss in decorative applied to cases of Pinus radiata wood impregnated (D. Don) copper type C azole micronized
2015 - IRG/WP 15-20571
Six treatments (one control and five decoration coatings) were applied to radiata pine wood treated with micronized copper azole (uCA-C), for outdoor use (R3) at a rate of 3.08 kg/m3 retention (T2). One decoration coating was applied before impregnation treatment: Prestain P (T3), and two, were applied in mixture with the uCA-C preservative Black Cylinder (T5) and Red Cylinder (T4). Two varnish we...
R Garay, M Inostroza
Performance of bio-based building materials – viewpoints from the first year of COST Action FP1303
2015 - IRG/WP 15-20572
Maintaining and expanding the market potential for bio-based building products in indoor and outdoor construction uses remains a key activity for industries in the forestry and biotechnological sector, particularly in Europe. Whilst there are ongoing activities within IRG for collecting and populating a database on performance on wood, the performance data for many other (i.e. non-wood) "environme...
D Jones
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
Wood protectors to control Bursaphelenchus xylophilus
2015 - IRG/WP 15-30661
Bursaphelenchus xylophilus, the pine wilt nematode (PWN), is a quarantine organism with a high potential to damage Conifer forests in Europe. The European Union is concerned in the protection of forest stands from the propagation and dispersion of this pathogen. In this line, the current control measures have been unsuccessful in preventing the dispersion of this organism, as it continues to be de...
M T Troya, C S Arcos, A Navas, L Robertson, M Conde, F Llinares
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
Effect of a wood stabilizer on checking of red oak log sections
2015 - IRG/WP 15-30664
Abstract: Reduced check development and dimensional stability can be important attributes in wood products used for decorative applications. The potential for using a silane-based stabilizer product to reduce checking was assessed on red oak stem and log sections. Pressure treatment produced the largest uptakes, although the levels suggested that the solution had failed to completely penetrate th...
C S Love, J J Morrell
Functional silicones used as a potential tool for the development of non-biocidal wood treatments
2015 - IRG/WP 15-30665
The increase of wood resistance against biological agents for outdoor use is conventionally performed by deep impregnation with preservatives. However, some of the traditional wood preservatives, used for decades for wood protection and regarded as the most effective, are currently subjected to severe restrictions because of their toxicity. In fact, new preservation technologies are constantly ent...
F Lhumeau, C Delaite, F Marchal, F Pochon, M Kutnik
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
Tall oil – performance after a decade of field exposure
2015 - IRG/WP 15-30672
Water repellents have the potential to enhance biocidal activity by reducing leaching and lowering the moisture levels in wood exposed to rains. A range of studies have been performed in order to evaluate the potentials of tall oils as wood protective systems. The general conclusion has been that tall oil can provide some protection but that they cannot compete with the copper and organic biocide ...
G Alfredsen, P-O Flæte
Search for an anti-sapstain treatment for fresh radiata pine wood in compliance with European BPD norms: Field Tests
2015 - IRG/WP 15-30673
In response to the impending restrictions on the use of pesticide active ingredients developed to control the staining of fresh wood, as a result of regulation issued in 2009 by the European Union, a project was proposed to test an alternative anti-sapstain treatment that meets both the European restrictions and the performance required for an export-quality radiata pine fresh wood treatment. A se...
P Montes C, T Hanke W
Development of a new characterization method to analyse Cypermethrin penetration in wood material by immunolabelling
2015 - IRG/WP 15-30674
The preservative efficacy of organic biocides is strongly related to their capacity of penetration and retention within wood tissues. The specific detection of the pyrethroid insecticide cypermethrin is currently obtained after extraction followed by chemical analysis by chromatography techniques. However visualizing the insecticide molecule within the wood structure requires specific probes toget...
S Tapin-Lingua, K Ruel, J-P Joseleau, D Messaoudi, O Fahy, M Jequel, M Petit-Conil
The situation of the industrial protection of wood in Argentina (La situación de la protección industrial de la madera en Argentina)
2015 - IRG/WP 15-30675
Argentina holds 33 million hectares of native forests and 1.2 million hectares of cultivated forests, which make it the 3rd Latin American country with the largest surface of cultivated forests of the region. (Ministry of Industry, 2012). The industrial impregnation of wood through vacuum pressure was first implemented in our country in the year 1932, and currently there are over 100 active plants...
D A Gherscovic