Your search resulted in 281 documents. Displaying 25 entries per page.
Results of the resistance of acetylated wood against marine borers at three Italian sites after five years of sea immersion
2022 - IRG/WP 22-10994
…Pinus radiata (radiate pine) in solid and medium density fibreboard (MDF) panels is compared with that of the untreated Scots pine, radiata pine and other untreated wood of European species such as Fagus sylvatica (European beech), Castanea sativa M. (chestnut), Quercus robur L. (European oak) and marine…
S Palanti, F Stefani, M Andrenacci, M Faimali, I Guarneri, M Sigovini, D Tagliapietra
Application of an Ultrasound-based Instrument to Evaluate Condition of Drywood Termite Infested Timber Components
2022 - IRG/WP 22-11000
…fundamental physical and mechanical properties such as density, specific gravity, and dynamic MOR. SylvatestDuo was utilized to evaluate the current state of the wooden component through ultrasound wave propagation means. The wave propagation features (time-of-flight and velocity) were then translated to…
S Fauziyyah, L Karlinasari, D Nandika, R Wimmer
Combining MRI and X-ray CT to monitor fungal decay of plywood and OSB in a lab test
2022 - IRG/WP 22-20683
…specimens before and after the decay experiment, local density decrease due to fungal decay can be assessed easily. However, during the decay experiment, mass loss due to degradation by the fungus (density decrease) is masked by moisture production by the fungus (density increase). In this paper, we explore the…
L De Ligne, T Núñez Guitar, C Vanhove, J Van Acker, J Van den Bulcke
Acetylation of pine wood in Uruguay
2022 - IRG/WP 22-40927
…when subjected to acetylation at a laboratory level. Density, weight percent gain and water content of small samples were determined before and after being impregnated by vacuum-pressure with acetic anhydride-acetic acid, and later cured at 120 °C for 1 or 2.5 hours. To determine the chemical reaction between…
C M Ibáñez, L Castillo
Surface chemical wood densification through in situ electron beam polymerization: description and dose study
2022 - IRG/WP 22-40933
…used to improve wood mechanical properties by increasing density of the material throughout its thickness. While mechanical surface densification has heavily been investigated, surface treatments involving impregnation of monomers remain unexplored. This study describes a new material, surface densified through…
J Triquet, P Blanchet, V Landry
Evaluation of different wood by-products for sustainable building biomaterial production using fungal mycelium
2022 - IRG/WP 22-50373
…alternative for traditional products ranging from low-density objects to semi-structural applications. They also present the advantage of using the waste streams from other productive processes as feedstock, enabling the upcycling of materials that can help us transition into a circular economy. In this study…
C Charpentier-Alfaro, M Poggerini, S Palanti, G Della Rocca, D Pellegrini, A Crisci
Effect of Heat Treatment on Physical and Mechanical Properties of Oriental Beech Wood (Fagus orientalis L.)
2021 - IRG/WP 21-40923
…perpendicular to grain, Janka-hardness, shear strength, density, and swelling were determined following heat treatments. Results indicated that mechanical properties are the function of temperature and duration of modification. Modified samples show lower mechanical properties compared to the control ones.…
M D Ghalehno, D Chu, B N Sheshkal, M Humar, M Bahmani
Decay and water resistance of Siberian and European larch wood
2019 - IRG/WP 19-10941
…difference, which is clearly correlated to the wood density. Combinate effect of wetting ability and inherent durability of tested materials exhibited in resistance dose, where European larch show the highest resistance dose.
B Lesar, D Krzisnik, M Humar
Natural durability of four Tunisian Eucalyptus wood species and their respective compositions in extractives
2019 - IRG/WP 19-10942
In the 50’s, Tunisia government introduced more than 11 Eucalyptus wood species. Eucalyptus species were planted in Tunisia in different arboreta throughout the country for close observation and adaptation to climate and soil. These fast-growing wood specie…
S Ben Ayed, M T Elaieb, S Dumarçay, B De Freitas Homen De Faria, M-F Thévenon, P Gerardin, K Candelier
Coula edulis baill an unknown wood species as an alternative to the main durable wood species used in Gabon
2019 - IRG/WP 19-10945
…edulis could be explained by several reasons like the high density and hydrophobicity of its wood as well as its high lignin and extractives contents. Chemical analysis performed on extractives by GC-MS indicated the presence of gallic acid, quercetin and tannins.
C S A Bopenga Bopenga, S Dumarçay, P Edou Engonga, P Gerardin
Validation by micro-computed tomography of an assessment method to measure the residual strength of anobiids infested timber
2019 - IRG/WP 19-20650
…(consumed by beetles) and original/residual apparent density. Since the beetles’ attack produces a diffuse damage with a set of tunnels in random directions and sizes, this makes quantification more difficult. Micro-computed tomography (μ-XCT) was used to enable better assessment of material degradation…
J L Parracha, M F Pereira, A Maurício, P Faria, L Nunes
Exploring the use of X-ray micro CT as a tool for the monitoring of moisture production and mass loss during lab-based fungal degradation testing
2019 - IRG/WP 19-20654
…play. As this non-invasive technique allows to assess the density of wood in three dimensions, it enables us to obtain localized info inside wood during degradation, without disrupting it.
In this paper, we will describe the challenges associated with X-ray CT scanning for monitoring of fungal degradation during…
L De Ligne, J Van den Bulcke, A De Muynck, J M Baetens, B De Baets, L Van Hoorebeke, J Van Acker
Wood Protection Through Diffusion: Dimensional Stabilisation with Amine Oxides
2019 - IRG/WP 19-30747
…pressures and/or vacuum and increase significantly the density of the treated wood (Reinprecht, 2016). In this project, wood was impregnated through diffusion with amine oxides and organic fungicides. The treated wood evaluated for its dimensional stability and its uptake of chemicals.
S Pepin, P Blanchet, V Landry
Outbreak of timber pest in Philippines: A consequence of frequent typhoons
2019 - IRG/WP 19-50348
…This report presents a preliminary evaluation on pest density of two tree pests such as mound building termite Macrotermes gilvus and Rhinoceros beetle, Oryctus rhinoceros after Typhoon Hainan in 20013 and their control strategies.
P Dhang
Termite resistance of wood-plastic composites made with acetylated wood flour, coupling agent or zinc borate
2018 - IRG/WP 18-10917
…WPC blends of 50% western pine wood flour (WF) and high-density polyethylene (HDPE), and untreated pine solid wood. The study included two unmodified control WPC blends (one with cut surfaces and one with plastic rich surfaces); one blend with 3% coupling agent (maleated polyethylene, MAPE); one blend with…
R E Ibach, Y S Hadi, C M Clemons, S Yusuf
Understanding of the effect of ancestral and natural saltwater treatment on durability, fibers densification and chemical modification of palm wood
2018 - IRG/WP 18-10921
…results showed a significant increase of the air-dried density of palm wood samples which increases after their wood salt water immersion. Salt water treatment allows improving greatly the palm wood MOR in bending and paralleling to the fibers. Termite’s resistance tests highlighted that native and treated palm…
M T Elaieb, A Namsi, M Tella, M-F Thévenon, K Chandelier
Use of x-ray microdensitometry for assessing the resistance to the fungus C puteana of a hybrid larches population
2018 - IRG/WP 18-10923
…purposes but showed, in presence of severe decay, high density due to collapsed cell walls during the conditioning at 65% RH and 20°C. Unfortunately, the X-ray microdensitometry could not able to distinguish, by the means of resistance to Coniophora puteana, the inter-trees variability within the larch…
S Palanti, F Alderighi, F Stefani, J P Charpentier, L E Pâques
Study of the effect of extractives on the natural durability of Eucalyptus bosistoana wood
2018 - IRG/WP 18-10928
…It is a complex phenomenon involving factors such as wood density, chemical composition, particularly the lignin content, and extractives (quantity and type), anatomical characteristics, sapwood / heartwood ratio and others, like environmental factors, growth factors, silvicultural interventions, origin, genetics,…
M Ibáñez, C Mantero, N Silva, F Resquín
Degradation of Eucalyptus transmission poles varies across regions in Zambia
2018 - IRG/WP 18-30727
…used. The detection, identification, fungal richness and density of termites across climatic zones are recommended for further investigations.
P Ng’andwe, D Chungu, E Ncube
Wood-Plastic Composites preservation against fire: Nanofillers as fire retardant alternative
2018 - IRG/WP 18-40843
…The effect of nanofillers on fire retardancy of Wood-High density polyethylene Composites was studied with three nanofillers, an organically modified nanoclay and fumed nanosilica and nanoalumina with percentages of 1%, 3% and 5% respectively. Samples had been prepared by twin-screw extrusion with percentages of…
D Ben Ammar, A Koubaa, S Migneault, H Bouafif
The Study of the Preparation of Overlaid MDF with the Flame Retardant Impregnated Paper
2018 - IRG/WP 18-40848
The preparation of overlaid medium density fiberboard (MDF) was studied. The flame retardant impregnated papers (FRIP) were overlaid on the surface of the MDF for the fire protection. The results showed that: 1) The production of the FRIP was based on the technology of melamine-impregnated…
W Qu, M Wu, Y-Z Wu
Thermally modified timber treated with methacrylate
2018 - IRG/WP 18-40849
…by treatment with the resin probably due to a higher density of the material. Formation of blisters occurred but was reduced by treatment with the resin. Resistance to mould growth by a mixture of Aureobasidium pullulans, Cladosporium cladosporioides, Aspergillus versicolor, Penicillium purpurogenum was…
O Karlsson, O Myronycheva, DJones, D Elustondo, D Sandberg
Durability Testing of a Cattail (Typha spp.) based Insulation Material against Termite Attack
2017 - IRG/WP 17-10879
…sponge-like tissue. The test material has a low specific density of 0.65 kg/m³. Test specimens consisted of sections of insulating panels which would typically be used in walls and roofing areas, as well as inside living areas.
It is especially desirable that cattail-based insulating material is suitable for use…
M Dass, W Unger, T L Woods
Effects of climatic factors and material properties on mould growth on untreated wooden claddings
2017 - IRG/WP 17-10884
…was significant for both pine and spruce. The effect of density on mould growth was tested for the spruce heartwood material, but was not found to reduce the residual variance significantly. However, all the tested climatic factors affected mould growth significantly; relative humidity was most important, while…
S Karlsen Lie, G I Vestøl, O Høibø, L Ross Gobakken
Case study: “Riesenbühlturm”
2017 - IRG/WP 17-20599
…five stem discs were taken and relevant parameters (density, moisture and remaining metal content) were determined at four points (3, 6, 9, and 12 o’clock position).
The results confirm the hard treatability of Douglas fir sapwood. Remaining metal content correlates with the performance of the logs,…
E Melcher, J Müller