Your search resulted in 146 documents. Displaying 25 entries per page.
Quantitative and qualitative losses in wood of oriental spruce, Picea orientalis (L.) Link., induced by insects from forest to utility
2008 - IRG/WP 08-10647
In this study, some quantitative and qualitative losses in wood of oriental spruce, Picea orientalis (L.) Link., induced by insects from forest to utility were evaluated. In experimental plots, volume of trees damaged by Dendroctonus micans (Kug.) was 34% of the volume of total standing spruce trees in the oriental spruce forests of Turkey. The volume of standing trees that D. micans damaged was ...
H A Akinci, M Eroglu, G E Özcan, Ü C Yildiz
Influence of boiling on the quality of oakwood during peeling processes
2008 - IRG/WP 08-10656
Peeling process may be an efficient technology to transform secondary quality trees into veneer. After cutting and drying, veneer can be used for plywood or LVL production. If natural durability of these new panels is sufficient, they may be used for joinery production without preservative treatment. With the collaboration of ENSAM Cluny, Zvolen University and Pau University, we have investigated ...
M Svoradová, F Charrier, R Marchal, L Bléron, B Charrier, J-C Butaud
The susceptibility of hardwood plywood to white rot
2008 - IRG/WP 08-40397
The subject of the tests was resistance of veneer hardwood plywood to activity of pure culture of white rot fungus Trametes versicolor. The tested plywood was made with the use of the following glues: urea-formaldehyde (UF), melamine-urea-formaldehyde (MUF) or phenol-formaldehyde (FF). 4, 12 and 15 mm thick plywood was tested. External veneer of the plywood was mostly alder and the inner veneer (c...
A Fojutowski, A Kropacz
Chemical Analysis in Production Quality Control at Wood Treatment Plants
2008 - IRG/WP 08-20396
Analysis methods for quality control analysis in wood treatment plants have evolved with the changes in treatment preservative chemistries and analytical instrument technology. The basic hydrometer specific gravity measurements used for solution strength and classic wet chemistry methods for wood have given way to instrumental techniques such as X-ray fluorescence, automatic titrator, and HPLC. No...
P Walcheski, L Jin
Control de calidad eficiente de proteccion superficial sobre madera
2008 - IRG/WP 08-20397
Quality control is important to assure efficient protection of wood surfaces. When wood is exposed to the environment, it degrades due to weathering or environmental factors alone. Aging tests are utilized to test coating products. Quality control techniques are performed on exposed products according to standardized methods (NCh, ASTM, ISO, DIN, EN, FTMS, NTF, NBINT, or equivalents). Certified l...
A M Fernández S
The Present Situation and Future Development in Quality Assurance for Wood Protection in China
2009 - IRG/WP 09-20418
This paper provides a comprehensive review of the quality assurance program for wood protection industry in China in term of guiding policies, standardization and implementation activities. The potential deficiencies with the existing practices regarding to the quality of wood protection products and suggestions for the further research and development directions to improve the system are also dis...
Kang Hua Cheng
Colour change monitoring of photodegradation in Scots pine (Pinus sylvestris) – a short term focus
2009 - IRG/WP 09-40442
Colour change monitoring of photodegradation is a quick and easy method for monitoring rates of photodegradation in timber. A study was undertaken to compare this technique to other monitoring methods, including microtensile strength changes and weight loss. Colour changes due to accelerated sunlight exposure were monitored using a Datacolor check spectrophotometer and compared with a set of contr...
V Sharratt, C A S Hill, D P R Kint
Biological Treatment to Improve Wood Product Quality and Durability - Fifteen Years of Effort and Experience at FPInnovations-Forintek Division
2009 - IRG/WP 09-40444
Wood plays an important role in the world economy. However, wood is subject to attack from wood-degrading fungi and insects and durability and quality of wood products are becoming increasing concerns for consumers. Development of effective and low environmental impact technologies to improve wood product quality and durability will be required to address these concerns. The application of a bio...
Dian-Qing Yang
Estimating the heat treatment intensity through various properties of thermally modified timber (TMT)
2009 - IRG/WP 09-40459
The suitability of different measures for prediction of the heat treatment intensity was investigated. Therefore, the resistance to impact milling (RIM), the lightness L*, the equilibrium moisture content (EMC), the anti swelling efficiency (ASE) and the total amount of soluble carbohydrates (TSC) of heat treated specimens were correlated with corresponding fungal resistance achieved by heat treat...
C R Welzbacher, C Brischke, A O Rapp
Morphological and Impregnability Properties of Narrow-Leaved Ash (Fraxinus angustifolia Vahl.) Wood Taken From Plantations with Different Spacings
2009 - IRG/WP 09-40475
Narrow-Leaved Ash, an important hardwood in Turkey, (Fraxinus angustifolia) is one of the fast growing species. In Turkey, several plantations have been established for 40 years. Narrow-Leaved Ash grows very fast and produces 25 (m3/year) mean increment. Except for eucalyptus and poplar, this increment is the highest compared to the other imported fast growing wood species. Until 1980, the spacing...
C Güler, H Ibrahim Sahin, S Sen
Third Party Quality Control and Laboratory Procedures in the United States
2010 - IRG/WP 10-20430
With over 5 billion treated board feet produced in the United States each year, there is a need for an established set of Quality Control and Laboratory procedures for independent agencies. These QC procedures ensure retailer and consumers that treated wood products have met conformance standards. These procedures provide treating facilities with guidelines on the production and service of treated...
C Barber, T Greer
Impact of climate change on wood deterioration - Challenges and solutions for cultural heritage
2010 - IRG/WP 10-20441
Deterioration of wood in cultural assets follows the same physiological mechanisms as in modern structures. Therefore rules and data for prediction of service life derived from old wooden structures can be used to model the service life of recent wooden structures and vice versa. The latter is done in this paper: From experimental test set ups in the field spread over Europe, climatic data, wood t...
C Brischke, A O Rapp, M Hasan, R Despot
DNA-based tools for rapidly detecting, quantifying and monitoring ophiostomatoid fungi on beetles, in trees and wood products
2010 - IRG/WP 10-20450
Approximately half of the trees harvested for commercial purposes are lost because of native or introduced insects or insect-vectored microorganisms. Ophiostomatoid fungi, which are well adapted to dissemination by insects, include ~140 species of saprobes and pathogens. They are present worldwide, have high economical impact and many are subject to quarantine regulation. Thus, it is necessary to ...
L Khadempour, Young Woon Lim, S Massoumi Alamouti, C Breuil
Preventing decay in termite monitoring stations
2010 - IRG/WP 10-30546
In-ground monitoring stations and termite baits are widely used in the southern United States with the intent of detecting and eradicating subterranean termite activity near buildings. These stations comprise a wood (or other cellulose material) substrate (monitor) and perhaps a termiticidal toxicant (bait) held in a plastic cage that allows for both easy examination and access by termites. The us...
A M Taylor, Jae-Woo Kim, S Duarte, L Nunes, J D Lloyd
Influence addition of boron compounds to adhesives on the bonding quality and fungicidal properties of glued wood
2010 - IRG/WP 10-40497
Wood is one of the most important construction materials. However, users of wood face two issues: limited dimensions and insufficient durability. These issues have been overcome with the development of bonding and wood preservation. The preservation of glued wood is elucidated in this paper. Through the addition of boric acid to adhesives, we tried to improve the fungicidal properties of glued woo...
M Humar, B Lesar, A Ugovsek, M Kariz, P Kralj, M Šernek
TMT–Interlab–Test to establish suitable quality control techniques - Structure and first results
2010 - IRG/WP 10-40503
As a result of growing quality demands from manufacturers and end-consumers of thermally modified timber (TMT) recent scientific research activities are increasingly focussed on modification mechanisms and by this on the development of suitable quality control methods. To deepen the knowledge in modification mechanisms and to obtain a larger variety of scientific data for TMT depending on the trea...
C R Welzbacher
Effect of borax-boric acid Treatment of simul (Bombax ceiba) Veneers on Glue-Bond Quality of Plywood
2010 - IRG/WP 10-40525
The glue-bond quality of plywood made of treated simul (Bombax ceiba) veneers was investigated. The veneers were treated with cold and hot water solution of borax-boric acid (BB) of different concentrations and treatment durations. The plywoods were made at three different pressures in hot press using urea formaldehyde glue. The glue-bond strength of untreated plywood in dry shear-test was found t...
K Akhter, Md Abul Hashem, S Akhter
Slice - Cut and Analyze Laser Microdissection (LMD): A method to produce sample material from modified wood for chemical quality analysis
2011 - IRG/WP 11-20478
Wood modification with its various systems is an established way to enhance a wood products’ service life in outdoor applications. Per definition, selected material properties are enhanced by means of modification without producing toxic substances or residues during service life and combustion afterwards. The systems of impregnation modification include a physical and often chemical alteration ...
K Zimmer, E Larnøy, A Treu, M Fongen
Thermally modified timber (TMT) for decking applications – determination of relevant surface properties
2011 - IRG/WP 11-40544
In recent years thermally modified timber (TMT) entered various market segments. It is used for facades, horticultural equipment, garden furniture, and also for kitchen and bathroom cabinets. However, flooring turned out to be the most important application for TMT, either as interior parquet or as exterior decking. Besides durability and dimensional stability, which had been the initial target pr...
L Meyer, C Brischke, C R Welzbacher
Implementation of a Quality Assurance System for thermally modified timber (TMT) by the Association of Central European TMT-Producers
2011 - IRG/WP 11-40558
Due to increasing market shares of thermally modified timber (TMT) in Europe, a working group of ten central European TMT manufacturers (TMT-WG) was founded in 2010 to cover public relations and marketing activities. Since the present level of product testing and property declaration was not satisfying, a “task group TMT-quality” was put into action in 2010 to develop a comprehensive quality a...
C R Welzbacher, W Scheiding
Evaluation effect of kiln schedule on Warp, Twist, Bow and surface checks in Poplar Wood
2011 - IRG/WP 11-40565
In this research, to establish a kiln-drying schedule for poplar (Populus nigra) lumber with 75 mm thickness that cut down from North Khorasan province in Iran, with three schedules T5-D2 (Forest Product Laboratory), T5-D3 and T8-D5 were adapted for drying the lumbers down to the final moisture content of 8±2%. primary dry bulb temperature each three schedules was adjusted at 49,49 and 54°C and ...
M. Akhtari, M.Arefkhani
Decay factors in termite in-ground monitoring stations
2012 - IRG/WP 12-10775
Subterranean termites are serious pests of wood in service in much of the world. One of the most common techniques for monitoring and controlling termites is the use of in-ground monitoring stations which comprise a wood or other cellulosic material monitor (cellulosic matrix) and/or a termiticide bait held in a open plastic holder so facilitates examination and the termite access. Wood and other ...
S Duarte, A M Taylor, Jae-Woo Kim, J D Lloyd, M Duarte, L Nunes
Comparative studies on the moisture performance and durability of wooden facades
2012 - IRG/WP 12-20492
Wooden claddings are traditionally used in many parts of the world. Also modern structures are frequently made from timber and timber engineering panel products. However, wood has to compete with other cladding materials and its durability needs to assure sufficient functional and aesthetic service life. Besides many other factors the durability of a wooden facade is dominated by its moisture perf...
T Bornemann, C Brischke, J-M Lück
Moisture performance based wood durability testing
2012 - IRG/WP 12-20495
In the frame of a scientific cooperation within the Swedish research program ‘WoodBuild’ comparative field and laboratory durability studies have been carried out by the Technical Research Institute of Sweden SP and Leibniz University Hannover. One objective was to improve test methods as well as evaluation systems in order to facilitate the use of (field) testing for service life prediction. ...
L Meyer, C Brischke, A Pilgård
Influence of heat treatment intensity on the structural integrity of 14 timber species
2012 - IRG/WP 12-40586
Thermally modified timber (TMT) is characterized by improved durability and dimensionally stability, but strength properties, especially the dynamic ones, are compromised at the same time. Because dynamic standard tests require high efforts and time, the high-energy multiple impact (HEMI) –test was developed for the fast and reliable characterisation of the structural integrity of TMT, showing a...
C R Welzbacher, C Brischke, G Maier