Your search resulted in 711 documents. Displaying 25 entries per page.
Evaluation of ACQ-D treated Chinese fir and Mongolian Scots pine with different post-treatments after 20 months of exposure
2010 - IRG/WP 10-30530
The performance of alkaline copper quat-type D (ACQ-D) treated Chinese fir (Cunninghamia lanceolata Hook.) and Mongolian Scots pine (Pinus sylvestris Linn. var. mongolica Litv.) stakes after 20 months exposure in Chengdu and Guangzhou of southern China were evaluated according to AWPA standard E07-07. The ACQ-D treatments used two concentration levels (0.5 and 1.0%) and four different post-treatme...
Lili Yu, Jinzhen Cao, Wei Gao, Haitao Su
The Effects of Natural Weathering on the Properties of Heat Treated Alder Wood
2010 - IRG/WP 10-40484
Heat treatment is an effective method to improve the dimensional stability and biological durability of wood. The heat treatment technology and the heat treated wood products were recently introduced to Turkey. However, only a few studies have been reported on the effect of natural weathering on the properties of heat treated wood in both Turkey and the world. In this study, heat treated alder (Al...
S Yildiz, Ü C Yildiz, E D Tomak
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
Wood protection by means of electro osmotic pulsing technology (PLEOT)
2010 - IRG/WP 10-40505
Wood protection is mainly based on chemical protection of wood. The disposal of wood preservative treated material causes restrictions in its later use or recirculation into the eco-cycle. A new protective system, electro-osmotic pulsing technology on wood, called PLEOT, is tested in a fungi test and in soil contact. Mass loss and moisture content of Scots pine sapwood samples was calculated after...
A Treu, E Larnøy
Wet and dry adhesion of coatings on modified and unmodified wood: comparison of the pull-off test and the cross-cut test
2010 - IRG/WP 10-40524
The objective of this paper is to study the influence of several types of modification (acetylation, furfurylation, thermal modification) on coatings adhesion and to compare two methods of assessing the adhesion: the cross-cut test and the pull-off test both tested in dry and wet conditions. The study also investigates the effect of other parameters of the wood substrates on adhesion like the ring...
L Podgorski, G Grüll, M Truskaller, J D Lanvin, V Georges, S Bollmus
Comparison of laboratory and semi-field tests for the estimation of leaching rates from treated wood
2010 - IRG/WP 10-50274
The authorization of wood preservative formulations in the European Union according to the Biocidal Products Directive (BPD) includes the assessment of environmental risks by the emission of active ingredients. This risk assessment includes scenarios for preserved wood (e.g. house scenario, noise barrier), in which the predicted environmental concentration (PEC) for soil and water is calculated, u...
N Morsing, M Klamer, B Seidel, J Wittenzellner, M Maier, J Habicht
NHA Choice test: Feeding dilemma for Reticulitermes flavipes (Kollar)
2011 - IRG/WP 11-10746
An AWPA laboratory choice test was performed with Reticulitermes flavipes (Kollar) to determine the role of feeding stimulation or aggregation by N’N napthaloylhydroxylamine (NHA). Pine blocks were vacuum treated with aqueous concentrations of NHA ranging from 250-10,000ppm and exposed to one gram R. flavipes workers in the dual block choice test which included one treated and one untreated ...
F Green III, S N Kartal, P K Lebow, R A Arango
Decay hazard mapping for Europe
2011 - IRG/WP 11-20463
In this study, two different dose-response models for above-ground decay as well as a model transferring macro climate data to wood climate data are presented. The models base on data from field trials, which had been conducted at 28 European test sites, and were used to calculate the relative risk for decay caused by climate variability in Europe. The two dose-response models give coherent result...
C Brischke, E Frühwald Hansson, D Kavurmaci, S Thelandersson
Service life prediction of wooden components - Part 3: Approaching a comprehensive test methodology
2011 - IRG/WP 11-20464
This paper is the third in a series on 'service life prediction' of wooden components and should be considered as a discussion paper. The authors tried to analyze the topic with a look from a distance and comment sometimes with a smile on the current controversial discussion about SLP issues. Nevertheless, the viewpoints of different groups, such as natural scientists, engineers, approva...
C Brischke, C R Welzbacher, L Meyer, T Bornemann, P Larsson Brelid, A Pilgård, E Frühwald-Hansson, M Westin, A O Rapp, S Thelandersson, J Jermer
Above ground testing at tropical test sites, what have we learned?
2011 - IRG/WP 11-20473
Three different above ground test methods have been utilized at a selection of five tropical and sub-tropical test sites with a variety of treated and untreated material. The results show that a multi-site approach to above ground field tests presents the opportunity for exposure to un-predicted biodeterioration hazards, which may be important for developmental products of poorly characterized fu...
A Preston, A Zahora, Y Cabrera, L Jin, C Schauwecker, P Walcheski
Ten Year Field Tests of Borate-Treated Wood Against Subterranean Termites
2011 - IRG/WP 11-30557
In the mid 1990s, Forintek Canada Corp. initiated a study of the termite resistance of borate-treated lumber above ground, protected from rain in Canada, Japan and Hawaii. Predominant termite species at three test were Reticulitermes flavipes in Canada, and Coptotermes formosanus in both Japan and Hawaii. The material included hemlock and amabilis fir lumber treated with disodium octaborate tetrah...
P I Morris, J K Grace, K Tsunoda
Novel Approaches to the Development and Testing of Anti After-glow Additives for CCA-based Treatments of Poles
2011 - IRG/WP 11-30561
In this paper, a field fire stake testing screen method is described. This method uses stake samples from matched wood sources allowing replicates from different boards to be included. The method is easy to control and can provide quick comparative fire resistance test results. The parameters measured from the tests are percentage weight loss, minimum residual circumference and residual thicknes...
L Jin, P Walcheski, A Preston
Comparison of rates of wood decay from four different field test protocols following 4-5 years exposure at a site in New Zealand
2011 - IRG/WP 11-30565
The rate of decay of Pinus radiata was evaluated using four different field test protocols at a site near New Plymouth, New Zealand. The average Scheffer index was 86 over the five year period of testing. The field tests were an in-ground stake test (AWPA Std E7-01) and three above ground tests – lap-joint (AWPA Std E16-98), decking (AWPC protocol) and ground proximity tests (AWPA Std E18-06) T...
P Lobb, K Day, A Siraa
The case for using borates in termite control in tropical Australia
2011 - IRG/WP 11-30573
A brief historical overview of boron based wood preservatives efficacy against subterranean termite management worldwide, and in Australia, is presented. The boron based compounds to be used in H2 hazard conditions, may be applied as a surface treatment by dip, flood coat or spray, and rapidly penetrates to the centre of timber substrates, whether containing sapwood or heartwood. However, section ...
B M Ahmed (Shiday), J R J French
Challenges and new developments in testing electro osmotic pulsing technology (PLEOT) by means of conventional laboratory methods
2011 - IRG/WP 11-40555
A new wood protection system, electro-osmotic pulsing technology, called PLEOT, is tested in lab trials using different test setup. The technology is tested on Scots pine sapwood and beech wood samples exposed to brown- and white rot fungi. Mass loss and moisture content is calculated after testing and a chitin analysis are performed on the sample powder.
Two different electrodes are used in ord...
A Treu, E Larnøy
Wet and dry adhesion of coatings on modified and unmodified wood: influence of 18 months of natural weathering on the pull-off test and cross-cut test results
2011 - IRG/WP 11-40569
The objective of this paper is to study the influence of several types of modification (acetylation, furfurylation, heat treatment) on coatings adhesion after 18 months of natural weathering according to EN 927-3 in Vienna (Austria).
The paper compares two methods for assessing the adhesion: the cross-cut test (EN ISO 2409) which is the conventional method used and recommended in EN 927-3 and th...
L Podgorski, G Grüll, M Truskaller, J D Lanvin, S Bollmus
Laboratory and Field evaluation on Natural Resistance and Feeding Preference of Different Wood Species to Subterranean Termites (Isoptera: Rhinotermitidae, Termitidae) in Pakistan
2012 - IRG/WP 12-10769
The resistance of twenty four different woods to attack and damage by subterranean termite species Heterotermes indicola (Wasmann) and Coptotermes heimi (Wasmann) was evaluated by choice and no choic in laboratory and field trials. Mean wood mass loss was calculated for both laboratory and field trials results using Analysis of Variance (ANOVA). Mean percentage termite mortality was calculated fo...
S A Malik; F Manzoor, B M Ahmed (Shiday)
Long term durability of the heartwood of seven common softwood species in above ground conditions
2012 - IRG/WP 12-10771
The natural durability for wood in above ground use has been evaluated based on results after 11 years of exposure in a test site situated at the Danish Technological Institute in Taastrup, Denmark. Selected results for seven common softwood species exposed horizontally are reported. The test results cover samples with direct rain exposure (use class 3 of the European standard EN335-1:2006) and sa...
E Tang Engelund, M Klamer, T Mark Venås, B Lindegaard
The Technical Criteria on Biological Evaluation of Wood Preservatives for Use Category C4.1 in Southern China
2012 - IRG/WP 12-20481
According to the Regulations on Pesticide management of the People's Republic of China, wood preservatives belong to agrochemicals. The establishment of registration system on wood preservatives would be benefit to management of preservatives, including the market entrance and safety insurance to the human beings, livestock and the environment associated by the application of these preservati...
Xingxia Ma, Mingliang Jiang
Use of the durable species Coast Redwood as a reference system for field testing of Wood Protection systems
2012 - IRG/WP 12-20486
Data is provided and discussed for a number of field exposure tests where the naturally durable wood species Coast redwood, Sequoia sempervirens, was included along with untreated pine and standard preservative treatments. In general, there is potential for higher variability of results with this naturally durable species, but it does suggest that redwood can be a useful reference material for te...
A Zahora, A Preston, L Jin
Evaluation of fungal infestation and decay in a simulated use class 3 situation (block test) after some years of exposure
2012 - IRG/WP 12-20487
The so named “block test” was designed as part of the assessment methodology for testing the behaviour of natural and modified wood used under use class 3 (EN 335-2) conditions. The test was developed to expose the wood close to the ground to an environment with high humidity and high biological activity, but not in soil contact.
The present study describes the evaluation of fungal infestatio...
A Gellerich, K Röhl, S Adamopoulos, H Militz
Effects of microclimate, wood temperature and surface colour on fungal disfigurement on wooden claddings
2012 - IRG/WP 12-20490
Wooden claddings are common in façades in Norway, and Norway spruce (Picea abies) is the most frequently used species. The cladding is a major part of the facade, and it has visual requirements that may define the aesthetic service life. The visual changes that occur during weathering can be colour changes, abrasion or wear, blistering, flaking, and even cracks in the wood or coating, but more of...
L Ross Gobakken, G I Vestøl
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
In-ground variability of decay intensity within a test field
2012 - IRG/WP 12-20496
Timber exposed in the ground faces most severe conditions in terms of exposure to wetting and fungal decay in the terrestrial environment, therefore wood durability tests are often conducted in test fields preferably ensuring the occurrence of all relevant decay organisms. One can also expect differences in decay within an individual field-test site due to localized distribution of certain organis...
C Brischke, S Olberding, L Meyer, T Bornemann, C R Welzbacher
Durability of timber products – Part 2: Proposal for an IRGWP - Durability Database
2012 - IRG/WP 12-20497
A proposal for a web-based platform for scientific exchange of test data in the field of wood durability and wood protection has been made. The overall aim of the durability data base is to improve the usability of existing test data and to create an added value for durability research and service life prediction.
The database allows for test results from standardized and non-standardized laborat...
C Brischke, L Meyer, G Alfredsen, M Humar, L Francis