Your search resulted in 792 documents. Displaying 25 entries per page.
Outdoor performance of Tanalith® K treated timber: Dimensional stability and corrosivity towards metal fasteners
2023 - IRG/WP 23-30798
This study was carried out to investigate dimensional stability and corrosivity towards metal fasteners in radiata pine (Pinus radiata D. Don) treated with Tanalith® K to Hazard class 4 (H4) retentions in comparison with chromated copper arsenic (CCA) treated timber. For corrosion test, untreated and treated matched specimens were prepared from Australian-grown radiata pine, tested with mild stee...
G Rassam, J Hague, D Humphrey
Adhesion and performance of exterior wood coatings on chemically and thermally modified wood – Results from 5.5 years outdoor exposure
2023 - IRG/WP 23-40964
Non-durable softwood and hardwood species were treated with the water-soluble cyclic N-methylol compounds 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU) and methylated DMDHEU. One half of the modified specimens were coated with a waterborne acrylic coating system prior a natural weathering for 5.5 years according to EN 927-3 (2020). By frequent evaluations, the impact of chemical modifications ...
L Emmerich, H Militz
Estimation of single shear strength performance of screw joints with decayed wood
2023 - IRG/WP 23-40968
In order to use existing wooden structures for a long term, it is necessary to evaluate appropriately the damage degree of bio-deterioration of the structural performance including the members and joint systems. As one for them, it is necessary to estimate more accurate the single shear strength performance of screw joints with decay. Therefore, we proposed the model considering the yield strength...
R Inoue, K Tanaka, T Mori
Through-boring to improve the performance of low durability Eucalyptus species for utility poles: 10-year field test results of pole stubs exposed in Southeast Queensland
2023 - IRG/WP 23-40972
An impending shortage of naturally durable hardwood electricity pole timbers in Australia has encouraged investigation of alternatives containing less durable, untreatable heartwood. Through-boring or drilling holes perpendicular to the long axis before treatment, has been used successfully on refractory softwood poles in North America and might have application in Australia. The use of through-bo...
J Norton, L P Francis, J J Morrell
Optimization of furfurylic alcohol/tannin ratio to improve the performance of biosourced thermoset resins for wood protection
2023 - IRG/WP 23-40994
This study concerns the chemical modification of wood with different ratios of tannin and furfuryl alcohol (FA) in the presence of maleic acid as catalyst. Tannins were used not only as cross-linking agents, but also as co-monomers to improve wood durability, while reducing the amount of FA used. Different aqueous formulations were prepared containing decreasing amount of FA (from 45.45% to 0%) an...
E Azadeh, A Pizzi, P Gérardin, C Gérardin-Charbonnier
What products are architects using? Relationships between deterioration part and structural performance in wooden houses
2023 - IRG/WP 23-50374
Architects work in the development of ideas around buildings and all the nuclei where human activity is generated. It is a work of organization of matter, in time and space, where the conceptual world of ideas and the aspirations of inventions, the interior world interact with the exterior in many kinds of realities.
But as architects, we have always been interested in why and how things have bee...
I de las Casas
Relationships between deterioration part and structural performance in wooden houses
2023 - IRG/WP 23-50376
Based on the survey examples, there are four patterns of deterioration that tend to occur in plywood bearing walls of wooden houses in Japan. The first is a pattern in which wall is in a whole deterioration. It is a no damage wall or test specimen. The second is a pattern in which only the sill is deteriorating. It is caused by moisture or termites from ground to the base. In addition, there is a ...
Y Ota, H Ishiyama, S Okamoto
Efficacy performance of Pea Extract as bait toxicant for termite control in Reunion Island
2024 - IRG/WP 24-11050
This study was carried out to determine the toxicity of Pisum sativum L., extract (Pea Extract) for the subterranean termite, Coptotermes gestroi (Isoptera: Rhinotermitidae). Yellow field peas (Pisum sativum L.) are particularly rich in protein. A solid-liquid hydroalcoholic extraction process was employed on the dried form of pea seeds to obtain one particular peptide PA1b (Pea Albumin 1, subunit...
J Vuillemin, D Messaoudi, A Robert, P da Silva
Effectivity of zinc borate in medium density fiberboard (MDF) for ground proximity testing
2024 - IRG/WP 24-20723
Medium-density fiberboard (MDF) is one of the most used and versatile wood composites. Most of its use has been focused on interior applications. Adhesives such as p-MDI (polymeric methyl diphenyl diisocyanate) provide MDF with a better performance against moisture, but resistance against decay is also required for outdoor use. A mix of wood fibers, p-MDI, and 0.75%-1.5% of ZB was made to produce ...
S M Vega Gutierrez, T Olivadoti
Elevated pressure hybrid wood modification: Synergistic effects on durability performance
2024 - IRG/WP 24-20725
The combination of different wood modification technologies to obtain improved performance is increasingly receiving attention in research. In this study, Scots Pine was impregnated with furfuryl alcohol (FFA) in pure aqueous 20, 40 and 60% solution strength without adding any catalyst. In a second step, the FFA was polymerized while simultaneously performing thermal modification in a closed syste...
P Klaas, D Jones
Preliminary investigation of the durability and performance of 1,3-dimethylol-4,5-dihydroxyethylene urea (DMDHEU) treated aspen strandboard
2024 - IRG/WP 24-30804
Wood modification technologies are growing in popularity because of their potential to improve wood properties by permanent covalent chemical modifications rather than chemical impregnation. These features can be utilized in wood composites to help improve dimensional stability and composite resistance to fungal decay. In this study, 1,3-dimethylol-4,5-dihydroxyethylene urea (DMDHEU) was used to m...
S Johnson, F Kamke, G Presley
International joint field trial on the moisture performance of wood – Set up and first results
2024 - IRG/WP 24-40996
Wood durability to decay stems from its inherent resistance to fungi resistance to fungi. In this regard, wood's ability to withstand moisture uptake plays an important role as the lower threshold for wood decay is a moisture content of 25%. However, the aspect of moisture resistance is not yet sufficiently emphasized as a durability factor, both in the assessment of durability as a material prope...
C Brischke, et al. (33 co-authors)
Outdoor termite resistance performance of zinc borate (Borogard® ZB) treated parallel strand lumber (PSL) – 15 years field test results
2024 - IRG/WP 24-40999
This report discloses the outdoor termite resistance performance of PSL samples treated with zinc borate at a dosage of 0.85% BAE and 1.72% BAE in Wuxi, China. The outdoor field trial lasted for 15 years and observations were made after 6 months, 3 years, 5 years 1 month, 6 years 6 months and 15 years. The retaining rates of B2O3 and ZnO in the final samples were also tested, and the hypothesis wa...
S Shi, E Laval, K Lung, F Ascherl, R Williams, W Li, X Li
Evaluation of mass timber materials for military and commercial trailer decking
2024 - IRG/WP 24-41009
In this study, CLT trailer decking was manufactured to current military trailer decking specifications, verified using PRG320 performance criteria, and treated with either waterborne or oil borne wood preservatives. Preliminary results show adequate uptake of preservative solution and subsequent testing shows minimal effect due to treatment. Field durability tests are also being conducted of treat...
G Kirker, A Senalik, X Wang, K Ohno, R Arango, M Mankowski, X Xie, J Eskola, N Kamprath, S Karwaczynski, M Weaver
Performance of Douglas-fir cross laminated timber (CLT) subjected to elevated humidity in a ground proximity field test for 6 years
2024 - IRG/WP 24-41010
The ability of insecticidal soil drenches or spray-on insecticide/fungicide treatments to protect mass timber elements exposed in a high moisture environment but out of direct soil contact was assessed using a modified AWPA ground proximity test established in 2017. Three-ply Douglas-fir CLT pieces measuring 305 x 355 x 105 mm (L x H x W) were installed at the Harrison Experimental Forest (HEF) (S...
M E Mankowski, J J Morrell, T G Shelton, G T Kirker
Analysis and performance of spruce alternative species and discarded wood for windows production
2024 - IRG/WP 24-50386
Climate change is having a significant impact on European forestry, particularly on the softwood species used for window frames. This study investigates potential replacement tree species for spruce (Picea abies), the predominant material for window frames. We evaluate Douglas fir (Pseudotsuga menziesii), Scots pine (Pinus sylvestris), thermally modified poplar (Populus nigra) and discarded silver...
B Lesar, J Levanič, M Humar, A Treu
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