Your search resulted in 485 documents. Displaying 25 entries per page.
Evaluation of the water exclusion ability and inherent bioactivity of heartwood against decay in Japanese and European wood species via above-ground exposure and water absorption tests
2024 - IRG/WP 24-40998
The natural durability of wood has been thought to mainly depend on bioactive extractives and the water exclusion ability. To clarify the contribution of each factor to wood durability, above-ground exposure tests were conducted on Japanese and European wood species. A double-layer test was carried out using heartwood specimens of four wood species, i.e., Japanese cedar, Japanese cypress, Scots pi...
T Osawa, R Noda, K Yamamoto
Determining the minimum water vapor permeability of exterior wood coatings by means of hygrothermal and decay models
2024 - IRG/WP 24-20717
The objective of this study was to determine the minimum water vapor permeability of exterior wood coatings for log homes using hygrothermal and decay modeling. The approach is based on a worst-case scenario assumption, namely a moisture trap at a given wood moisture content in a coated wall log. The minimum limit of vapor permeability of the coating system was determined by simulating the time re...
U Hundhausen, S Ullah, D Kraniotis
The durability and mechanical properties of 40 years old Black locust poles
2024 - IRG/WP 24-11042
This study investigates the durability and mechanical properties of 40-year-old black locust (Robinia pseudoacacia) poles harvested from a vineyard in Slovenia. Wood from these poles was compared to recently harvested black locust wood to determine possible reuse options. Visual inspection, hyperspectral imaging, and laboratory tests were conducted to assess decay, density, mechanical properties, ...
M Humar, J Malik, J Levanic, D Krzisnik, E Kerzic, B Lesar
Multifactorial analysis of the reasons behind wood natural durability
2025 - IRG/WP 25-11065
Physical, chemical and biological properties of several wood species were investigated in order to highlight the main factors involved in wood natural durability and wood characteristic using a principal component analysis. Interaction of wood with water were evaluated using contact angle measurements to determinate wood wettability by water and wood impregnability tests with water allowing to cal...
L-F E Nkogo, M S M Mouendou, S Dumarçay, P E Engonga, F Zannini, E Gelhaye, P Gérardin
Influence of incising methods and wood moisture content on ‘deep penetration treatment’ in Japanese cedar and larch
2025 - IRG/WP 25-20749
To expand applicability of ‘deep penetration treatment’, a solvent-borne and non-pressure treatment that is commonly coupled with roller-type incising using a flat blade, we investigated drill and laser machining as alternative incising methods and examined the influence of wood moisture content on the preservative penetration. Various incising methods were applied to heartwood of Japanese ced...
S Taira, T Miyauchi, S Isaji, H Matsunaga
NTR classified preservative-treated laminated wood
2025 - IRG/WP 25-20750
NTR is a trusted quality labelling system used for the classification and quality control of wood products that have been treated with preservatives or modified. These labels are issued by the Nordic Wood Preservation Council (NWPC) and in recent years, producers of glued laminated timber as well as building material suppliers have shown increasing interest in NTR classification for glued laminate...
J Jermer, F Westin, R Digaitis
The Impact of Drying Techniques on the Quality of Thermally Modified Wood
2025 - IRG/WP 25-30813
The wood drying technique applied before loading the dry wood into the ThermoWood® kiln may affect its properties. For this purpose, Scots pine (Pinus sylvestris) boards were first dried through three drying methods, including radio-frequency/vacuum (RF/V), mild, and moderate conventional drying, and then loaded into a ThermoWood® kiln for thermal modification at 212 °C for 3 hours according to...
M Ghorbanian Far, N Sharifi, A Nikoutadbir, A Tarmian, M Humar
The non-energy utilization of low-quality wood from the invasive species Prunus serotina
2025 - IRG/WP 25-30814
Alien invasive species in Europe, such as Prunus serotina, can significantly impact ecosystem structure and function. This species provides low-quality timber, which is most often used for energy purposes in the form of biomass. In the era of policies focused on a circular economy, seeking methods to extend the life cycle of raw materials and wood products is necessary. For this purpose, the wood ...
W Perdoch, P Kołwzan
Performance Verification of Water-Based Outdoor Wood Protection Coatings Based on Weather Resistance Evaluation
2025 - IRG/WP 25-41015
Recent trends in wood protective coatings: Concerns over volatile organic compound (VOC) emissions and the need to reduce maintenance costs have increased demand for environmentally friendly and highly durable coatings. While conventional solvent-based paints are superior in durability, they have been associated with problems such as environmental impact and odour during application. As an alterna...
N Ikemoto
Experimental characterizing of liquid water uptake and release – key to understand moisture-induced decay risk analysis
2025 - IRG/WP 25-41020
Wood can absorb water vapour (sorption) or liquid water (capillarity). Moisture from liquid water (rain, spray water) is often a problem for the performance of wood products used in outdoor structures. Wood is prone to biodegradation when is it too moist for too long periods. Experimental studies that allow conclusions to be drawn about the practical use of wood water uptake are limited due to the...
M Nopens, J T Benthien, J Trautner, C Brischke