Your search resulted in 627 documents. Displaying 25 entries per page.
Coula edulis baill an unknown wood species as an alternative to the main durable wood species used in Gabon
2019 - IRG/WP 19-10945
The Congo Basin hosts an exceptional biodiversity of trees, flora and fauna. However, the immense natural heritage of the forests in this area is increasingly threatened by many anthropogenic factors, due to selective exploitation of certain wood species. In Gabon, whose ecosystem is representative of this area, the forest represents nearly 80% of the national territory. Only a minority of wood sp...
C S A Bopenga Bopenga, S Dumarçay, P Edou Engonga, P Gerardin
From fungal detoxification systems to wood durability in neotropical forests
2019 - IRG/WP 19-10946
White-rot fungi are able to mineralize all the wood components due in particular to an efficient detoxification system. We hypothesised that components of this detoxification systems, glutathione transferases, could be used as tools to explore the natural durability of neotropical wood species. Analysis of the interactions between six glutathione transferases of Trametes versicolor and extracts of...
T Perrot, G Salzet, N Amusant, J Duchene, E Gelhaye
Wood natural durability an asset to the circular economy of wood industry: valorization of waste from sawmills for the cosmetics sector through the ValorExtr@ct project
2019 - IRG/WP 19-10954
The French Guiana ‘s forest is characterized by its incredible biodiversity; more than 1200 wood species have been listed to date. Some argue that this diversity would be linked to the hot, humid climate with no seasonal variation, which would be ideal conditions for the installation of a constant "arms race" between predators and prey. Thus, to cope with biotic and abiotic attacks, wood species...
N Amusant, J Passelande, D Fernand, J Beauchene, E Houel, M Royer
Performance of wood decking after 5 years of exposure: verification of the combined effect of wetting ability and durability
2019 - IRG/WP 19-20647
Wood is one of the most important construction materials and its use in building applications has further expanded in recent decades. In order to enable even more extensive and reliable use of wood, factors affecting wood’s service life need to be understood. More recently, a new concept to characterize the durability of wood-based materials and to predict the service lives of wood was proposed,...
M Humar, D Krzisnik, B Lesar, C Brischke
Durability by design – a case study of the performance of wooden decks after 9.5 years of natural weathering
2019 - IRG/WP 19-20648
The service life expected for wood decking manufactured with poorly durable wood species, left untreated and exposed to severe environmental conditions such as high humidity and active biological agents, is usually assumed to be short (less than 10 years). The current classification of wood’s natural durability is based on EN standardised tests which do not fully reflect the real end-use conditi...
M Kutnik, M Montibus
Durability classification of preservative treated and modified wood
2019 - IRG/WP 19-20659
EN 350 (2016) allows formally to determine durability classes (DC) for wood products and wood-based materials, which was previously only possible for untreated wood in the form of natural durability. In a first study, the University of Goettingen carried out the durability classification of chemically modified (modified with 1,3-dimethylol-4,5-dihydroxyethyleneurea, DMDHEU) and preservative-treate...
S Bollmus, L Bachle, C Brischke, H Militz
Performance based specification of wood – Introducing project CLICKdesign
2019 - IRG/WP 19-20661
This paper introduces the new ForestValue research project CLICKdesign – delivering fingertip knowledge to enable service life performance specification of wood. This European consortium is working on the primary innovation to move from the complex, fragmented and general to the easy-to-use, consolidated and specific by provision of an accessible digital tool for specifiers. Competing materials ...
E Suttie, C Brischke, E Frühwald Hansson, S Fortino, J Sandak, M Kutnik, G Alfredsen, C Lucas, R Stirling
Preservative Treatment of CLT: An Example at Shimojishima Airport
2019 - IRG/WP 19-30748
Cross laminated timber (CLT) is a relatively new construction method that allows multi-storey construction using solid wood instead of concrete or steel. It is a method favoured by progressive architects and recognized for its much lower environmental footprint. Wood is an excellent construction material and is a long-term carbon sink that also performs well in the event of earthquakes and fire....
J Lloyd, N Yamashita, A Taylor
Using X-ray scattering to elucidate the mechanisms behind the moisture and fungal decay resistance of epoxybutene modified wood
2019 - IRG/WP 19-40854
Chemical modification of the hydroxyl groups of wood can improve the properties of wood by providing moisture and biological resistance, as well as dimensional stability. Southern pine solid wood was chemically modified to various weight percentage gains (WPG) with epoxybutene (EpB, 8%-38% WPG). After modification, specimens were extracted with a toluene: ethanol (2:1) solution for 2 hours or wate...
R E Ibach, N Plaza
Study on the ability of wood-destroying fungi to grow through chemically modified wood
2019 - IRG/WP 19-40858
Over the last decades, chemical wood modification technologies were developed to increase the resistance against attack by wood-destroying organisms without using biocides. Most of those technologies are based on an impregnation step initially. In most treated wood products, mainly by using solid wood in thicker dimensions as in posts, poles, sleepers, deckings etc. it is known that wood impregnat...
L Emmerich, S Strohbusch, C Brischke, S Bollmus, H Militz
Potential of totora and derivatives as sustainable lignocellulosic material
2019 - IRG/WP 19-40859
Totora (Schoenoplectus californicus C.A. Mey. Soják) is a macrophyte from the Cyperaceae family that grows in the Americas from California to Chile. This plant has long been used by several cultures such as the Ohlone in California, the Moche in Peru, or the Incas in Los Andes. Some communities have maintained its traditional use until the present, such as the communities living nearby Lake San P...
J F Hidalgo-Cordero, D Casado, J García, L Robertson, M T Troya
Improvement of wood decay and termite durability resulting from combined treatments based on borax/phenol-formaldehyde impregnation followed by thermal modification
2019 - IRG/WP 19-40871
This study determined the factors influencing the boron content after leaching of pine blocks impregnated with aqueous solution of phenol-formaldehyde (PF) resin with or without borax and subjected to heat treatment by response surface methodology. An experimental design permits to analyze the effects of heat treatment temperature (150, 185 and 220°C), curing time (5, 12, 5 and 20 hours), resin c...
S Salman, M-F Thevenon, A Petrissans, S Dumarcay, P Gerardin
Natural durability and performance of Eucalyptus globulus single family house in Spain after 17 years exposure
2019 - IRG/WP 19-40873
From last century, in the country side in Spain is common to find wooden houses. The reason is mainly due the improvements in glues, materials, design by computer and processing in factories. All these technological advances have facilitated the development industrialized systems cheaper. However, the variety of row materials, designs and construction systems, combined with some hard climates, cou...
D Lorenzo, M Touza, J Fernandez-Golfín, A Lozano, J Benito
Durability testing of mass timber building elements: a call for a collaborative trial
2019 - IRG/WP 19-40875
Mass timber buildings have captured the imagination of architects and engineers seeking more environmentally friendly building materials. The mass timber movement has tremendous potential to markedly increase timber use in mid-rise to high rise buildings. With great promise, however, comes great risk. Most mass timber structures that have been built or are being planned use no protective treatm...
J J Morrell
Adhesion durability of the thinnest CLT in Japan treated by solvent recovery system
2019 - IRG/WP 19-40882
The purpose of this study is to clarify the adhesion durability of the thinnest CLT (36 mm thickness) in Japan impregnated with preservatives (azole neonicotinoid compounds (AZN)) under solvent recovery system so called “dry pressure process” for long-term durability. The adhesion durability tests were conducted in accordance with the Japanese Agricultural Standard (JAS) of Cross-Laminated-Tim...
K Kawakami, W Ohmura
Knowledge exchange and transfer from academia to industry in the field of wood protection research – Activities of the IRG-WP Communications Committee
2019 - IRG/WP 19-50354
The International Research Group on Wood Protection (IRG) was founded in 1969 as a structured group of like-minded scientists and technologists focused on generating knowledge of the science of wood deterioration, and novel solutions to provide sustainably and environmentally responsible products for the protection of wood-based materials. The primary function of the IRG is to provide opportunitie...
F Latorre, B Abbott, C Brischke, M Humar, D Jones, E Larnoy, L Nunes, A Preston, T Singh
Terrestrial laser scanning (TLS) – a potential tool for improved utilisation of the natural durability of Scots pine for solid wood products
2019 - IRG/WP 19-50358
The natural durability of sapwood of most species is generally low, while heartwood can be more resistant to biodeterioration. For the sawmill industry various lumber products require certain diameters and lengths of the logs in addition to requirements for wood properties. When utilising the heartwood, it is therefore important to acquire information already in the forest about which trees that c...
P-O Flaete
Wood Protection in Canada
2019 - IRG/WP 19-50360
Wood Preservation Canada is dedicated to promoting and supporting a stronger Canadian wood treating industry. In this presentation, wood protection in Canada will be reviewed through the lens of IRG’s five sections. Canada has 10% of the world’s forests, harvests 155 million cubic metres annually, and exports more than $17.5 billion CAD of wood products. Decay is the primary cause of wood biod...
M Tauvette, R Sterling
Durability and climate change - implications for wood building structures
2019 - IRG/WP 19-50361
Sustainable building practices are rooted in the need for reliable information on the long-term performance of building materials; specifically, the expected service-life of building materials, components, and assemblies. This need is ever more evident given the anticipated effects of climate change on the built environment and the many governmental initiatives world-wide focused on ensuring that ...
M Lacasse
Performance of naturally durable decks after 15 years of field exposure
2020 - IRG/WP 20-10963
A decking test of Canadian species considered to be naturally durable was inspected after 15 years of exposure at test sites in Ontario and British Columbia. Based on the materials used in this experiment, Douglas-fir and yellow cypress had the greatest decay resistance, followed by eastern white cedar and western redcedar, and then by western larch and tamarack. All materials tested were more dur...
R Stirling, D Wong
Durability of tropical species from Peru according to European Standards
2020 - IRG/WP 20-10964
Natural durability is defined as the intrinsic resistance of wood against the attack of destructive organisms. There are standardized methods to estimate a durability value. In Europe, the standard EN-350 is responsible for establishing the basic guidelines, as well as the necessary tests to determine this value, which is essential to know the degree of protection needed for the tested wood to ext...
J Valdivia, P Gómez, M T Troya, L Robertson, J A Martín, A Loayza
Durability of Eucalyptus globulus floating structures mussels trough in marine environment against marine borers in the Atlantic coast of Spain
2020 - IRG/WP 20-10965
In Spain, since forever damages caused by marine borers are frequent in wood elements and wood structures located in sea water conditions. Galicia is a region located in the North West of Spanish, above Portugal, characterized by their typical estuaries, where since ancient times, the natural production of mussels from floating structures mussels trough. Since ever, wood species selected to build ...
D Lorenzo, M Touza, J Fernández-Golfin, A Lozano, J Benito
Performance of bio-based building materials – durability and moisture dynamics
2020 - IRG/WP 20-20666
When exposed to conditions favourable for decay, bio-based building materials can be susceptible to degradation. Their ability to withstand deterioration over time (performance) depends on the intrinsic or enhanced durability of the material as well as its wetting and drying behaviour. The effect of fungicidal components in wood is known since long. Other material characteristics, such as the mate...
L De Ligne, J Caes, S Omar, J Van den Bulcke, J M Baetens, B De Baets, J Van Acker
Resistance against marine borers: About the revision of EN 275 and the attempt for a new laboratory standard for Limnoria
2020 - IRG/WP 20-20669
Wood protection technology in the marine environment has changed over the last decades and will continue to do so. New active ingredients, newer formulations, and novel wood-based materials including physically- and chemically-modified wood, together with increasing concerns over environmental impacts of wood preservatives, urgently demand a major revision of EN 275 “Wood preservatives – Deter...
S Palanti, S Cragg, R Plarre
Long-term field exposure of wood-plastic composites processed on a commercial-size extruder
2020 - IRG/WP 20-40894
Wood-plastic composites (WPC) contain wood fiber (or flour), thermoplastics and additives and are exposed to UV light, moisture, and biological deterioration in outdoor installations. Accelerated laboratory tests can help to predict the durability of WPCs, but long term evaluations are needed to validate these results. Field exposed above-ground WPC deck boards (30.5 x 139.7 x 609.6 mm) and in-gro...
R E Ibach, C M Clemmons, N M Stark