Your search resulted in 1435 documents. Displaying 25 entries per page.
How personality traits influence the perception of fungal decay in a wooden cladding – A survey in three Modelling wood moisture content in outdoor conditions from measured data
2024 - IRG/WP 24-41002
This study examined perceptions of fungal decay damage on wooden cladding across Norway, Sweden, and Germany. The majority of respondents across all countries did not find the fungal decay damage in question acceptable, with the least acceptance in Norway. Thi…
G W Gustavsen, G Alfredsen, P B van Niekerk, J Niklewski, C Brischke
Analysis and performance of spruce alternative species and discarded wood for windows production
2024 - IRG/WP 24-50386
…conditions at three different locations, with real-time moisture monitoring using resistometric sensors. Our results emphasise the superior performance of Douglas fir, which outperforms spruce in terms of decay resistance and mechanical strength. The acrylic/polyurethane coating significantly improved the DRd of…
B Lesar, J Levanič, M Humar, A Treu
Determining the minimum water vapor permeability of exterior wood coatings by means of hygrothermal and decay models
2024 - IRG/WP 24-20717
…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 required by the moisture trap to exit the decay risk zone, applying a dose-response model…
U Hundhausen, S Ullah, D Kraniotis
A novel method for assessing radial variation in termite resistance of timber
2023 - IRG/WP 23-11005
…that were peeled to a 3 mm thickness and dried to 10-15% moisture content. The samples were exposed to attack by the economically significant subterranean termite Coptotermes acinacinoformis. Mass losses and visual termite ratings were used to assess termite resistance.
S Kleinschmidt, R McGavin
Effect of Moisture Cycles and Timber Treatment on the Performance of Screwed Connections
2023 - IRG/WP 23-20694
The impact of moisture in timber structures is associated with the deterioration of timber, and loss of mechanical performance. Methods have been developed to treat timber using chemicals to inhibit deterioration, however, water intrusion has much more immediate effects on…
L Yermán, M Xiao, Z Yan, L-M Ottenhaus
Laboratory durability testing of preservative treated wood products – first attempts and observations
2023 - IRG/WP 23-20697
…The spatial distribution of fungal decay and wood moisture content had been investigated. The effect of end-grain sealing and pre-stressing of the specimens on the decay development were examined as well.
Handling of large specimens, e.g. sections of poles or other products, under sterile lab conditions was…
C Brischke, M Sievert, M Schilling, S Bollmus
Simulations of microclimates for wood-decaying fungi in the built environment using environmental analysis
2023 - IRG/WP 23-20703
…exposure over nodes of the common building geometry. The moisture content and temperature variations were then calculated point-by-point using simulation outputs, climate data and various models. A supervised machine-learning algorithm using artificial neural networks was used to calculate moisture content to more…
P B van Niekerk, J Niklewski, S H Hosseini, B N Marais, I Frimannslund, T Kringlebotn Thiis, C Brischke
Moisture performance of wooden shingles tested on the Golobar cable yarding
2023 - IRG/WP 23-20704
…and to accelerate drying after rainfall. In addition, wood moisture monitoring sensors were installed on the roof shingles. Based on three years of the wood moisture content measurements, it can be assumed that the grooves shorten the time when the moisture content of the roof shingles is optimal for fungal decay.…
M Humar, B Lesar, D Kržišnik
Modification of wood by fast pyrolysis bio-oil – the NewWave project concept for bio-based wood treatment
2023 - IRG/WP 23-40990
…CoE building.
The performance of the materials, moisture content, and temperature in envelope layers will be monitored in situ, allowing for observing the deterioration of materials and estimating service life regarding functionality and aesthetics. This information will be used for future optimization of…
A Sandak, J Sandak, F Poohphajai, R Herrera Diaz, A Gubenšek, K Butina Ogorelec, L Kiezebrink, K J Swager, H Heeres, B van de Beld
Eradication of beetles attacking wooden historical buildings by humidity-controlled warm-air treatment
2023 - IRG/WP 23-11028
…- adults, pupae, larvae and eggs - are killed. To prevent moisture content changes in the wood and the resulting shrinkage and swelling, the temperature and humidity of the atmosphere are controlled to follow an equilibrium moisture content curve determined by the initial moisture content. In practices, the space is…
Y Fujii, Y Fujiwara, M Harada, H Kitahara, M Shimada, S Kondo, Y Sato, M Shimada, R Kigawa, H Watanabe, Y Komine, S Hidaka, D Ogura
HCB - a new preservative combination for wood pole maintenance
1996 - IRG/WP 96-30122
…(HCB) applied on hardwood and softwood logs at different moisture content revealed successful diffusion of boron in all sapwoods within 7 days and in all sapwoods plus hardwoods within 15 days. The new cost effective paste sterilizes wood through diffusion and suitable for pole maintenance at groundline and above…
A K Lahiry
Accelerated testing for out of ground contact using natural biological preconditioning
1996 - IRG/WP 96-20088
…laboratory decay testing. Periodic microbial isolations, moisture content, permeability and weight loss tests were also conducted. Bacteria and moulds colonised the vermiculite and miniblocks well. Aureobasidium pullulans was common on TnBTO treatments. Basidiomycetes were isolated from the control miniblocks at 3…
S Molnar, D J Dickinson, R J Murphy
Decay capacity and degradation patterns of Xylaria hypoxylon on different wood species
2022 - IRG/WP 22-10985
…fungal decay including the wood substrate, temperature, moisture, oxygen, light, pH, and nitrogen. Understanding the effects of these factors on fungal decay is important for the effective utilization of wood decay fungi in biotechnological processes and for understanding the role of these organisms in global…
E Bari, G Daniel, A Singh, J J Morrell
Studies into the effect of soil type and soil layer on the in-ground decay of European beech
2022 - IRG/WP 22-20681
…included soil water-holding capacity (WHCsoil) and soil moisture content (MCsoil) of the sampled soils’ mineral layer, as well as soil temperature (Tsoil) and exposure time. The MCsoil of TMCs were set to 95 % of the mineral soil layers’ WHCsoil. The non-parametric Wilcoxon rank-sum test was used to compare…
B N Marais, S Kovacs, M Jansen, C Brischke
Significance of the thermal design and the sorption isotherm shape in hygroscopic wood moisture dynamics and service life
2022 - IRG/WP 22-20682
Moisture dynamics are considered important for predicting the service performance of wood in exterior applications. Above a critical moisture content, water acts a softener on the structural polymer matrix of the wood cell wall, enabling the necessary…
W Willems
Brief introduction to a research project on preparations of various paste formulations from boron, fluoride and copper for supplemental treatments
2022 - IRG/WP 22-30759
…of wood. Diffusible chemicals such as borates move through moisture in the wood but do not move in dry wood. This paper evaluates a recent research project on boron-based paste formulations prepared from boron mineral ulexite and some other actives such as fluoride and copper to be used in supplemental treatments in…
E E Soytürk, D Bakır, E Terzi, C Köse, S N Kartal
Post-layup protection of mass timber elements in above ground protected exposures: 2-year results
2022 - IRG/WP 22-30766
…organisms on this these materials merits attention. The effectiveness of currently labeled soil termiticides and passively applied biocides at post-construction or as remedial agents needs to be evaluated for mass timber used in structures, particularly in areas with elevated risk of termite attack. The ability of…
M E Mankowski, T G Shelton, G T Kirker, J J Morrell
Premature adhesion failure of exterior wood coatings – The influence of substrate temperature at coating application and moisture accumulation during storage
2022 - IRG/WP 22-40937
…of substrate temperature at coating application and moisture accumulation during storage on the adhesion of waterborne coating systems. In the first experiment, 4 batches of wood specimens were submitted to 4 different temperatures (-25°C, 0°C, 10°C, 20°C) before coating. In the second experiment, coated…
U Hundhausen
Evaluation of the physical properties of heat-treated native Peruvian woods for their application as coverings in buildings located in in arid, semi-warm and humid climates
2022 - IRG/WP 22-40943
…and ISO 15148 (2002) were used as methodology to know the Moisture Content and Absorption Coefficient in both species, both untreated and thermally treated. The results showed that the performance of both woods against humidity was different, where the thermal treatment in Cedrelinga catenaeformis Ducke wood was…
K Ayala Castro, A Loayza Argüelles, V J Pilco Mamani
On the biotope of dry rot (Serpula lacrymans) in the wild
1995 - IRG/WP 95-10123
…were interested in studying the natural biotope, i.e. the moisture, temperature and soil relationships. All together 15 fruiting bodies of the True Dry rot fungus have been found in the wild during the last 50 years. This suggests that competition from other species is limiting its occurrence in the wild. For…
J Bech-Andersen, S A Elborne, K Bech-Andersen
Influence of hydrophobic agents on the leachability of boron
1995 - IRG/WP 95-30064
…coat. The results demonstrate that boron diffuses even at moisture contents below 20%. Thus leaching can not be affected by hydrophobic agents placed on the inner surface of wood because diffusion still takes place within the cell-wall. Surface coatings have some protective effect but only during a distinct periode…
A Peylo, H Willeitner
Standardization of CCA treated 45 hardwood species grown in Bangladesh for REB crossarms
1995 - IRG/WP 95-20059
…most dense timbers were found to be kilndried slowly and effectively. Inherent strength, conventional sawing, conventional grading with pilodyn, kilndrying before treatment and slow air-drying before outdoor storing upto EMC (19% MC) at centerline of crossarms and adequate CCA-C treatment in treatable areas would…
A K Lahiry
Treatability of South African-grown Eucalyptus grandis with water-borne copper azole and disodium octaborate tetrahydrate wood preservatives
2021 - IRG/WP 21-40920
…wood applications. The results obtained showed that, at a moisture content of 12 ± 1%, sawn E. grandis sapwood can be impregnated to a mean retention level of 4.61 kg/m3 with CuAz and 7.98 kg/m3 boric acid equivalent (b.a.e) with DOT. The highest mean retentions obtained in the heartwood were 2.10 kg/m3 and 3.52…
A A Alade, Z Naghizadeh, C B Wessels
Application of suberin fatty acids extracted from birch bark for wood coating
2021 - IRG/WP 21-40914
…to improve decay resistance also reduce the equilibrium moisture content (EMC) of wood. The mechanism of this action, however, has been the subject of much debate. Several groups have suggested that decay resistance is a result of lower diffusion rates of fungal degradation agents through the wood cell wall. A…
A Kumar, Risto Korpinen, Veikko Möttönen
Utilization of coconut timber from north Sulawesi, Indonesia. Part 2: Treatability
1994 - IRG/WP 94-40025
…preservative retention, decreasing disproportionately with moisture content, proved ineffective at high moisture levels. On the other hand, an oscillating pressure process for impregnating green softwood has also proven effective with impregnating tropical hardwoods such as Rubberwood (Hevea brasiliensis). There are…
R-D Peek