Your search resulted in 333 documents. Displaying 25 entries per page.
Evaluation of coating applied in treated wood: experiences in Brazil
2017 - IRG/WP 17-40814
Weathering assays study the coating degradation caused by its exposure to the action of ultraviolet radiation, winds, heat and humidity. The use of test specimens in different arrangements and exposure angles is intended to reproduce various conditions in which a product can be used. The purpose of this paper is to present the efficacy of an oil-borne varnish applied on treated wood exposed to wea...
M F Natale, J M Vidal
Five-year evaluation of a field trial of Eucalyptus grandis poles treated with zinc and boron
2017 - IRG/WP 17-30721
Round Eucalyptus wood treatment in sequential stages with inorganic borates and metal salts (zinc sulfate and boric acid+borax) was studied; the aims were to form an insoluble precipitate of zinc borate inside wood and to reduce treatment costs by performing the first treatment by simple ascent and diffusion of the preservative, at the same time as it was sought to impregnate the heartwood. The se...
C Ibáñez, A Camargo, C Mantero, M Rabinovich
Evaluation of the Virulence of the Termite Species Occurring in the French Tropical Overseas Territories
2018 - IRG/WP 18-10913
The French tropical overseas territories are strongly affected by termites’ activity, which is especially devastating because the species encountered there are among the most virulent in the world. That is why in these regions it is particularly important that producers and users of wood-based products are provided with materials and preservative products whose durability and efficacy has been t...
M Kutnik, I Paulmier, J Vuillemin
Evaluation of the effect of zwitterionic buffers on termite gut protists
2018 - IRG/WP 18-10933
The thermal modification of wood is recognized as the most commercialized wood modification process. The treatment of wood at temperatures usually greater than 180 ºC results in a product with some properties enhanced (dimensional stability, durability, aesthetical colour) and some diminished (mechanical properties). The loss of mechanical strength is recognized as a limitation to the use of ther...
S Duarte, D Jones, L Nunes
Protocol of intervention against subterrranean termites in urban areas
2018 - RG/WP 18-20640
Subterranean termites are a problem of Mediterranean countries since their climatology favours their development. In Spain, termite attack is very important in cultural heritage and even in new construction, as they can cause serious damage to structural elements (pillars, beams, decks, etc.), carpentry (doors, windows, etc.) and wooden goods (furniture, paintings, libraries, etc.), causing not on...
J Galván, D Lorenzo, C Villagrá, L Robertson, R Viñambres, M T Troya
Visual appearance of unpainted wooden claddings during the first year of outdoor exposure: Evaluation of surface mould growth, lightness (L*) and wasp attack
2018 - IRG/WP 18-40841
This study addresses changes in visual appearance of unpainted wood materials exposed outdoors. Specimens of Norway spruce (Picea abies) Scots pine (Pinus sylvestris), aspen (Populus tremula), acetylated Radiata pine (Pinus radiata) and DMDHEU-modified Scots pine sapwood were exposed facing south in Ås, Norway for 60 weeks. During this period, surface mould growth development and wasp attack were...
S Karlsen Lie, L Ross Gobakken, G I Vestøl, O Høibø
Using X-ray micro-CT to evaluate density loss in anobiid infested wood
2019 - IRG/WP 19-10956
Considering the relevance of wood borers in construction, the present study had as main objective the evaluation of the impact of anobiid damage on timber elements by establishing an empirical correlation between lost material percentage (LM%, consumed by beetles) and apparent density (original – OTD and residual – RTD). Since the beetles’ attack produces a diffuse damage with a set of tunne...
J L Parracha, M F Pereira, A Maurício, P Faria, L Nunes
Validation by micro-computed tomography of an assessment method to measure the residual strength of anobiids infested timber
2019 - IRG/WP 19-20650
In this article a quantitative correlation study of pine timber structural elements, which have been subject to attack by anobiids, is presented. The main objective of the study was to establish a valid empirical correlation between the lost material percentage (consumed by beetles) and original/residual apparent density. Since the beetles’ attack produces a diffuse damage with a set of tunnels ...
J L Parracha, M F Pereira, A Maurício, P Faria, L Nunes
Effect of damage to polyurea coatings on metal losses from ammoniacal copper zinc arsenate treated Douglas-fir pile sections
2019 - IRG/WP 19-40867
Metal-based preservatives remain the most widely used treatments for protecting wood in soil or water contact. While these treatments are highly effective, one drawback is a tendency for small amounts of metal to migrate into the surrounding environment. The greatest risk in this regard is copper because many organisms are highly sensitive to this metal. While post treatment practices can reduce ...
M J Konkler, J J Morrell
Fungal damages in Norwegian massive timber elements – causes and measures
2019 - IRG/WP 19-40879
Massive wood elements are relatively new in Norway but the use is growing quickly, primarily the use of cross-laminated timber (CLT). Moisture performance of massive timber elements has been examined by some researchers, but more knowledge is needed. There is uncertainty regarding the need for vapour barriers or retarders in roof assemblies, and for practical reasons buildings are rarely assembled...
M S Austigard, J Mattsson
Experimental study on compressive strength performance of cross laminated timber with biodeterioration damage
2019 - IRG/WP 19-40883
The mass timber construction has attracted attention around the world. The reasons are due to the environmental impacts and the potential of the strength performance and quantity of the wood. Nowadays, CLT is one of the most important materials for the timber constructions. If we use CLT as a building material, we should consider the biodegradation risk for long time use. From an estimation of fut...
T Mori, Y Otsubo, R Inoue, M Ikeda, K Kambara, W Ohmura
Evaluation of chemical densification of three hardwood species through in-situ electron beam polymerization
2020 - IRG/WP 20-40893
Hardwoods are the most suitable species for wood flooring for their appearance as well as their hardness. Yet, improving hardness can provide substantial benefit for the wood flooring market. Chemical densification of wood and in-situ polymerization through electron beam technology was chosen to increase hardness of three hardwoods (Yellow birch (YB) (Betula alleghaniensis Britt.), Sugar maple (SM...
J Triquet, P Blanchet, V Landry
Application of diverse hyperspectral imaging systems for evaluation of heritage objects
2020 - IRG/WP 20-10971
Advanced imaging techniques are able to non-invasively characterize, monitor and evaluate the impact of conservation treatments on cultural heritage (CH) objects. In this specific field, hyperspectral imaging (HI) allows non-destructive characterization of materials by identifying and characterizing colouring agents, binders and protective coatings as constituents of an object’s original constru...
J Sandak, A Sandak, L Legan, K Retko, M Kavčič, J Kosel, F Poohphajai, R Herrera Diaz, V Ponnuchamy, N Sajinčič, Č Tavzes, P Ropret
Lab-scale termite damage synthesis using least squares generative adversarial networks
2020 - IRG/WP 20-20674
This manuscript investigated the feasibility of least squares generative adversarial networks (LSGAN) to generate synthetic images of lab-scale termite damage based on AWPA E1 standard, to push machine-learning forward into wood science field and to ameliorate the lack of a termite damage dataset. We leveraged LSGAN to learn the distribution of 203 uniquely termite damaged samples from previous ex...
D J V Lopes
Estimation of residual compressive strength on cross laminated timber with biodeterioration damage
2021 - IRG/WP 21-40918
CLT is susceptible to biodeterioration such as fungal decay and termite attack during long-term use for buildings. It is necessary to know the residual strength performance of biodegraded CLT for estimating future performance and aging of CLT. In this study, compression tests of CLT damaged by brown rot fungi and termites were conducted to clarify the relationship between residual strength and mas...
R Inoue, T Mori, K Kambara, W Ohmura
Evaluation of decay and energy properties from thermally modified biomasses during fungal deterioration by NIR-spectrometry
2021 - IRG/WP 21-40922
This study is focused on the prediction of fungal weight loss (WL) and high heating value (HHV) from raw and torrefied waste lignocellulosic feedstocks, according to their exposure duration to wood-destroying fungi, using near infrared spectroscopy (NIR) and chemometrics models.
Sugarcane bagasse, coffee husk, eucalyptus and pine shavings were torrefied at 290 °C in a screw reactor, during 5, 7...
B de Freitas Homem de Faria, P Santana Barbosa, J Valente Roque, A de Cassia Oliveira Carneiro, P Rousset, K Candelier, R F Teofilo
Evaluation of weathering and termite resistance of the Myoung-oil as a Korean traditional coating agent
2022 - IRG/WP 22-10996
This study investigated the applicability of Myoung-oil (MO) as an eco-friendly preservative of Korean wooden cultural properties and buildings. Wood test specimens painted with various concentrations of MO were exposed in the external environment. Then color change and wettability of the wood surface were evaluated and compared depending on the exposure time. As a result of exposure for 12 months...
S-M Yoon, Y Park, W-S Jeon, H-M Lee, J-G Park, K Dal Nam, W-J Hwang
Evaluation of ecotoxicological effects of different coniferous wood treatments on two marine bioindicator species
2022 - IRG/WP 22-10999
Coniferous wood panels (Picea abies) were treated with two concentrations of copper-based impregnating agent to increase its durability in marine and brackish environment. In order to assess the environmental compatibility of the treatments a laboratory experiment was conducted with two marine invertebrate species: bivalve Mytilus galloprovincialis and a gastropod Steromphala albida. The bioindica...
T Marčeta, N Nesto, I Guarneri, D Tagliapietra, V Moschino
Application of an Ultrasound-based Instrument to Evaluate Condition of Drywood Termite Infested Timber Components
2022 - IRG/WP 22-11000
The characteristics of ultrasound waves propagation from non-destructive ultrasound-based instrument on drywood termite infested wooden components were investigated. Features of wave propagation such as time-of-flight, velocity, and peak energy on three orthogonal wooden plane (longitudinal, radial, and transversal) were studied. The wooden components used on this study came from a traditional woo...
S Fauziyyah, L Karlinasari, D Nandika, R Wimmer
Evaluation of Decay Resistance of Copper-based Preservatives Treated-Wood exposed to different field test sites in Korea
2022 - IRG/WP 22-20679
In Korea, preservative treated wood is required to have a stamp on the surface which contains information such as wood species, use categories, and the company that treated the wood. Such stamping is necessary to safely and appropriately use the treated wood. Since majority of treated wood is being used outdoor environment, the treated wood must have efficacy against wood decay fungi or termite. I...
W-J Hwang, S-M Yoon, Y Park, Y-S Choi, H-M Lee, J-W Kim
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
Wood is a material that has properties suitable for its use in construction: as a structural component, cladding or decorative element, however, it is necessary to have knowledge of its physical, mechanical and thermal properties in order to have a logical criterion when applying it. It is known that wood has hygroscopic properties, so it tends to absorb the relative humidity of the natural enviro...
K Ayala Castro, A Loayza Argüelles, V J Pilco Mamani
Joints design considerations in indoor high humidity conditions
2022 - IRG/WP 22-40950
In recent years, a number of cases of degradation by wood destroying fungi have been detected in covered timber structures such as pools, wineries, bathrooms, etc. – in fact, any building where indoor air may reach high humidity values during certain periods of time.
The origin of this kind of decay was not related to water leaks, but to the condensation of the water vapor over the steel connec...
A Lozano, D Lorenzo, M Alonso, F Álvarez, J E Martínez
Evaluation of Decay Resistance for the Larch Wood Heat-treated with Superheated Steam
2022 - IRG/WP 22-40956
Heat-treatment of wood is a process that involves applying heat ranging 160–260°C to improve its physico-mechanical properties and resistance against wood rot fungi. The level of the changes in the wood properties by heat-treatment differs depending on the temperature and duration of heat-treatment, as well as the types of heat transfer media used for heat-treatment. The heat-treatment on wood ...
Y Park, S-M Yoon, H Kim, W-J Hwang
Evaluation of different wood by-products for sustainable building biomaterial production using fungal mycelium
2022 - IRG/WP 22-50373
As human population increases, the demand for new innovative, sustainable, and low impact construction materials also grows. Mycelium-based composites have shown to be an excellent 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 th...
C Charpentier-Alfaro, M Poggerini, S Palanti, G Della Rocca, D Pellegrini, A Crisci
Performance of treated Malaysian semantang bamboo (Gigantochloa scortechinii) - field and laboratory durability evaluation
2023 - IRG/WP 23-30788
Field performance of sematan bamboo, Gigantochloa scortechinii was evaluated under the Malaysian tropical climate, along with laboratory evaluation to white-rot fungi and mold. Starch was removed from the bamboo by submerging the bamboo in the river for 6-8 weeks, kiln-dried and cut to 300 mm (L) round bamboo and 25 mm (W) x 50 mm (L) stripe for the field and laboratory test respectively. Bamboo w...
S Lipeh, T Khadiran, Z Jalaludin, M K Anwar U