Your search resulted in 134 documents. Displaying 25 entries per page.
Effect of impregnation modification treatment on properties of Paraserianthes falcataria wood
2023 - IRG/WP 23-40966
…falcataria). Dimensional stability, mechanical properties, and failure characteristics have all been determined. The batai wood samples with dimensions of 10 mm (thick), 150 mm (length) and 20 mm (width) were treated through impregnation modification with 30% low molecular weight phenol formaldehyde (LMwPF) resin.…
A S Yusoh, A S Boneka, M K Anwar U, S Salim, S H Lee
Changes in topochemistry and mechanical properties of Beech (Fagus orientalis L.) by natural fungus infestation
2022 - IRG/WP 22-10986
…susceptible to fungal attack both in the fresh state and during the storage. Understanding the alteration in chemical and mechanical properties of beech wood during the initial degradation state can lead to improved raw material utilization. Therefore, UV-microspectrophotometer (UMSP) and High-Performance…
H Sivrikaya, M Rehbein, F Divos, S Adamopoulos, R Hosseinpourpia
Mechanical Properties of Thermally Modified Wood after twelve Months of Field Exposure
2022 - IRG/WP 22-40945
This study aimed to evaluate the durability and mechanical properties of two different woood species, namely beech (Fagus sp.) and silver fir (Abies alba), from Bosnia and Herzegovina thermally modified at three different temperatures and duration at maximum temperature. Samples of the mentioned wood…
R Hasanagić, M Bahmani, L Fathi, M Humar
Durability of thermally modified western hemlock lumber against wood decay fungi
2022 - IRG/WP 22-40954
…increase wood durability in the United States. Further standardization and testing of thermally modified North American species is needed to optimize the production of thermally modified products from regionally available resources. This work measures the impact of thermal modification of western hemlock lumber…
G Presley, J Cappellazzi, I Eastin
Marine borer resistance of various wood materials in Japan
2021 - IRG/WP 21-10983
…afterward, as the use of wooden marine structures and ships decreased. Today, however, use of wood as a construction material is officially promoted for its environmental benefits. The author started to immerse some wood materials in the seawater pool at PARI (Port and Airport Research Institute) and has…
M Yamada
Mechanical and biological durability properties against soft-rot and subterranean termite in the field (grave-yard test) of beech wood impregnated with different derivatives of glycerol or polyglycerol and maleic anhydride followed by thermal modification in an opened or in a closed system
2021 - IRG/WP 21-40917
This paper presents mechanical and biological durability properties in soil beg test (soft-rot test) and field test (grave-yard test) against subterranean termite of the wood modified with an aqueous vinylic derivative of glycerol/polyglycerol or maleic anhydride cured in an opened or in a…
M Mubarok, H Militz, S Dumarcay, I W Darmawan, Y S Hadi, P Gerardin
Effect of Heat Treatment on Physical and Mechanical Properties of Oriental Beech Wood (Fagus orientalis L.)
2021 - IRG/WP 21-40923
…to investigate the influence of heat treatment on physical and mechanical properties of Oriental beech wood (Fagus orientalis Lipsky.). Samples were exposed to temperature levels of 130˚C, 160˚C, and 190˚C for 3, 6, and 9 h. Selected physical and mechanical properties including compression strength parallel to…
M D Ghalehno, D Chu, B N Sheshkal, M Humar, M Bahmani
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
…plays a very important role on both the socioeconomic and ecological levels, in Tunisia. There are three million trees in Tunisian palm plantations, ensuring a potential significant wood production, mainly in the craft and furniture industries.
In the past, Date Palm wood (Phoenix dactylifera L.,) was also…
M T Elaieb, A Namsi, M Tella, M-F Thévenon, K Chandelier
Weathering protection of European hardwoods through double modification
2017 - IRG/WP 17-30715
Beech and poplar were thermally modified, treated with melamine resin and both treatments were combined. The weathering performance (cracks and general appearance) of modified beech and poplar was assessed in natural weathering and correlated to material properties…
G Behr, A Gellerich, S Bollmus, H Militz
Impact of heat treatment on physico-mechanical properties of torrefied Antholceistha djalonensis wood
2017 - IRG/WP 17-40811
…an effective method to improve the dimensional stability and mechanical properties of wood. This study was carried out to investigate the impact of heat treatment on the physic-mechanical properties of torrefied Anthocleistha djalonensis wood. Thirty nine defect-free specimens of dimensions 20 mm × 20 mm × 60…
E A Iyiola, B Olufemi, J A Fuwape, J M Owoyemi
Thermoplastic Plywood at Moderately Increased Thermal Conditions
2016 - IRG/WP 16-40735
…of plywood type construction in this manufacturing sector. Bending strength (BS) and tensile strength perpendicular to the surface (TS) at the moderate heat up of this material are presented, specifically BS at 30, 40 °C and TS at 30 °C. All increased temperatures are compared to the room temperature (20 °C).…
R Réh, M Guoth
Estimation of wood degradation determined by visual inspection, mechanical testing and DNA characterisation – report after 3 years of exposure
2016 - IRG/WP 16-30700
…influence of two separate treatments, thermal modification and alkaline copper quaternary (ACQ, Silvanolin©) treatment, on fungal decay, visual disfigurement, deterioration in mechanical properties and fungal community structure was assessed on Norway spruce (Picea abies) and compared with the performance of two…
N Thaler, T Martinović, M Bajc, D Finžgar, H Kraigher, A Sinha, J J Morrell, M Humar
The effect of preservative treatment on mechanical strength and structural integrity of wood
2015 - IRG/WP 15-30667
The use of wood for demanding construction applications is increasing in Europe. Wooden constructions are frequently designed of susceptible conifer wood, which is endangered by wood decay fungi in wet applications. Therefore in many cases treating wood with preservatives is…
M Humar, D Kržišnik, C Brischke
Some comments on durability testing of WPC according to EN 15534-1
2015 - IRG/WP 15-40695
The standard EN 15534-1 (2014) gives advice for broad characterization of WPC materials and products. It contains instructions for test procedures concerning different properties e.g. mechanical properties, thermal properties, as well as durability.
In this paper…
S Bollmus, A Gellerich, H Militz
Evaluation of vessel features on physical and mechanical properties of wood of Common black poplar (Populus nigra L.) grown at different elevations in the region with a continental climate
2014 - IRG/WP 14-40656
…the effect of elevation on the anatomical structure, and the physical and mechanical properties of Common black poplar (Populus nigra L.) wood. The scope of the study was to observe the variability of vessel element features on physical and mechanical properties of Common black poplar (Populus nigra L.) in…
I Usta
Changes of fungicidal, mechanical and sorption properties of wood during above ground outdoor exposure
2013 - IRG/WP 13-20513
…was to investigate differences in mechanical, fungicidal, and sorption properties of four different wood species (sweet chestnut (Castanea sativa), common beach (Fagus sylvatica), Norway spruce (Picea abies), and copper-ethanolamine (CuE) impregnated Norway spruce (Picea abies)) that were exposed in the 3rd use…
N Thaler, M Humar
Pre-treatment decay and strength loss of railroad ties, and their prevention
2013 - IRG/WP 13-30610
…properties was confirmed by evaluating the impact bending toughness of wood samples taken from untreated tie stock air dried in the southern United States. These results suggest that careful consideration should be given to tie drying methods and the timing of treatments with diffusible preservatives in…
A M Taylor, B Jordan, J D Lloyd
Copper leaching from copper-ethanolamine treated wood during exposure to terrestrial microorganisms
2013 - IRG/WP 13-30621
…of three different concentrations (cCu = 0.125%; 0.25% and 0.5%) were exposed to three different soils according to the ENV 807 procedure for periods between 12 weeks and 32 weeks. After respective periods of exposure, samples were isolated and their mass loss, bending strength and modulus of elasticity were…
M Humar, N Thaler, B Lesar
Combined effects of thermal modification and ACQ-D impregnation on properties of southern yellow pine wood
2013 - IRG/WP 13-40637
…southern yellow pine sapwood were first thermally modified and then treated by the alkaline copper quat-type D (ACQ-D) wood preservative. Two heating temperature (180℃ and 220℃) and two concentrations of ACQ-D solution (0.9% and 1.35%) were used in the experiments. The combined effects of thermal modification and…
Wang Wang, Yuan Zhu, Jinzhen Cao
Study on the Effect of Combined Nanosilver-Hygrothermal Treatment on Wood Properties
2012 - IRG/WP 12-40581
…was carried out to investigate its effect on some physical and mechanical properties of Iranian beech (Fagus orientalis Lipsky) and Russian imported spruce (Picea abies). Wood specimens were impregnated with nanosilver solution (400ppm) in an impregnation tank under pressure of 0.25 Mpa, for 20 minutes. Hygrothermal…
G Rassam, H Reza Taghiyari, A Karimi, B Jamnani, M Ebrahimi
Effects Of Wood Preservative On Mechanical Properties Of Glulam Manufactured From Lower Density Malaysian Tropical Timber
2012 - IRG/WP 12-40590
…has been known to interfere with mechanical properties and strength performance of wood. Therefore, to achieve the objective of the study 5-ply of glulam beams with 100mm(w)x 150mm(t) x3000(l)mm dimension were manufactured using sawn timber treated with wood preservative copper chrome arsenate (CCA)(Tanalith).…
L Francis, Z Ahmad
Improvement of the biological performance and dimensional stability of two tropical woods by thermal modification
2012 - IRG/WP 12-40605
Pink cedar wood and rubberwood were thermally modified at 230°C in air for 4 h or for 8 h, and then subjected to bending, compression and hardness tests to evaluate the effect of the treatment on these mechanical properties. The biological performance of the modified wood…
M M González-Peña
Study on the Effect of Combined Nanosilver-Hygrothermal Treatment on Wood Properties
2012 - IRG/WP 12-40581
…was carried out to investigate its effect on some physical and mechanical properties of Iranian beech (Fagus orientalis Lipsky) and imported Russian spruce (Picea abies). Wood specimens were impregnated with nanosilver solution (400ppm) in an impregnation tank under pressure of 0.25 Mpa, for 20 minutes. Hygrothermal…
G Rassam, H Reza Taghiyari, A Karimi, B Jamnani, M Ebrahimi
Effect of preservative treatment on mechanical performance of round and square poles made of small diameter Scots pine
2012 - IRG/WP 12-40612
…originates from the first or second commercial thinning stands. There is a need to find economically viable and high quality wood products that can be manufactured from this raw material. Small log volume means not only demands of increased efficiency for material handling in logistics and manufacturing processes,…
V Möttönen, R Stöd, K Heikkilä, H Heräjärvi
Multilayer hot-press drying and chemical modifying of poplar wood with urea-formaldehyde prepolymer
2011 - IRG/WP 10-40539
…was to determine the technology of chemical modifying and multilayer hot-press drying on poplar wood. The chemicals were impregnated into cell lumen space by pulse-dipping machine to improve the dimension stability and mechanical property of timber. The timbers were compressed and dried by the multilayer…
Guofeng Wu, Yifei Jiang, Sheng Yao, Junwen