Your search resulted in 243 documents. Displaying 25 entries per page.
Evaluation of the european standard ENV 12038 for durability testing of plywood
2001 - IRG/WP 01-20237
The latest improved version of the standard ENV 12038 drafted as document N44 by CEN Technical Committee 38 (WG 7 - WG 23) is used to evaluate the effect of wood composition and structure on plywood durability. The method described is based on the agar-block test of the EN 113 standard used for the determination of the efficacy of wood preservatives and the assessment of the natural durability of ...
J Van Acker, M Stevens, E De Clercq
The remaining concentration of inorganic wood preservative components in EN 252 stakes after ground contact
2000 - IRG/WP 00-50159
In order to determine the biological efficiency and the remaining concentration of different inorganic and organic active ingredients during service, EN 252 specimens were impregnated with 3 copper based wood preservatives. The stakes were installed in the test field of the DESOWAG GmbH, Rheinberg, for at least 7 years. At the end of the field test some of these stakes were divided into 10 uniform...
E Melcher, H-W Wegen
Artificial weathering exposure as an alternative for standard ageing according to EN 84 (leaching) and EN 73 (evaporation)
2002 - IRG/WP 02-20254
In order to verify potential weaknesses of wood preservatives fungal tests are carried out after ageing of wood preservative treated test blocks. The European standard EN 599 as a framework for efficacy assessment of wood preservatives includes the use of two ageing methods prior to fungal testing, namely a leaching method (EN 84) and an evaporation method (EN 73). The European research project "F...
J Van Acker, M Grinda, D J Dickinson
Determination of fungitoxic value of preservatives in laboratory wood-block tests. Part 1: Standard procedures
1989 - IRG/WP 2326
By applying a modified agar-block method, a comparative analysis was made on the toxic value of the wood preservative CCA against the test fungus Serpula lacrymans. The procedure applied to determine the results accounted for different standards: EN (Toxic limit), ASTM (threshold retention), GOST (threshold retention and protection probability), PN (toxic doses) and JIS (value of efficiency). Desp...
J Wazny, J D Thornton
Aggressiveness of Reticulitermes species in laboratory test
1993 - IRG/WP 93-10026
In European Standards concerned with the preventive action of wood preservatives against termites, i.e. EN 117, EN 118 the obligatory test species is Reticulitermes santonensis. It is argued that this species is more aggressive than the second European Reticulitermtes species, Reticulitermes lucifugus. Since Reticulitermes santonensis is confined to certain smaller areas in France and thus not rea...
H Hertel, S Pantos, D Rudolph
Some Experiences with Stake Tests at BAM Test Fields and in the BAM Fungus Cellar
Part 1: Comparison of Results of Visual Assessments and Determinations of Static Moduli of Elasticity (MOE)
2005 - IRG/WP 05-20319
With examples of routine in-ground stake tests differences are shown in the performance of wood preservatives at the BAM test fields Lehre and Horstwalde and in the BAM fungus cellar. Signs of attack of micro-organisms were assessed visually according to EN 252. Periodical determinations of static moduli of elasticity (MOE) revealed the influence of the attack on the elastic properties of the wood...
M Grinda, S Göller
EN 152: Is this Standard Relevant for today’s Wood Preservatives? A Critical Review.
2006 - IRG/WP 06-20331
The paper critically reviews the Blue stain test method described in EN 152 including possible test variables. Whereas EN 152 has been successfully used for solvent borne wood preservatives, it appears that the methodology is not suited for modern water borne products, where the majority fail.
The paper will show that there exist different quality claims not concordant with EN 599-1 within diff...
B Jensen, F Imsgard, J Larsen
Testing durability of treated wood according to EN 252. Interpretation of data from Nordic test fields
2006 - IRG/WP 06-20341
To evaluate the effectiveness of new wood preservatives intended for treated wood in ground use there is a European standard, EN 252. The test shall run for five years before any formal interpretation of the results can be made.
Due to environmental concerns, the use of wood preservatives based on copper, chromium and arsenic (CCA) has been restricted in recent years. As a consequence of restrict...
M L Edlund, F G Evans, K Henriksen, T Nilsson
Overview of European discussions on Standardisation and list of proposed standards for WPC performance qualification
2006 - IRG/WP 06-20345
The standardisation is a driving force to promote the development of Wood Polymer Composites (WPC) by giving confidence to users and consumers. In Europe, the high interest of WPC require at this time a diffusion of information concerning the performances of WPC products. The WPC performances must be assessed according relevant standards in order to qualify the intrinsic properties of WPC (mechani...
G Labat, M Vernois, T Gay
Microscopy evaluation of microbial decay patterns in wood stakes after 6 years in soil contact
2010 - IRG/WP 10-10715
Most studies on wood modification have so far been concerned with service life predictions rather than investigating the decay protection mechanism. Very little is known about the mode of action of these new treatments and about the strategies used by wood degraders in order to utilize the wood material despite a treatment. Access to such knowledge would allow further modification and improvement ...
A Pilgård, C G Björdal
Fouling and Boring Organisms Deteriorating Various European and Tropical Woods at Turkish Seas
2010 - IRG/WP 10-10741
This study aims to investigate the diversity of fouling and boring organisms damaging wood material at Turkish coasts. Trials were carried out at six harbour sites throughout the seas surrounding Turkey. Wood samples were hanged down at a depth of six meters in the sea, for a period of one year. Identification of the organisms obtained from wood plates revealed the presence of five wood borer and ...
S Şen, H Sivrikaya, M Yalcin, A Kerem Bakır, B Öztürk
Biological degradation of acetylated wood after 18 years in ground contact and 10 years in marine water
2010 - IRG/WP 10-40522
This paper addresses the resistance to biological degradation of acetylated wood.
Firstly, it presents results from an EN 252 test after 18 years’ exposure. The test is still running in Nordic NWPC test fields, Simlångsdalen in Sweden and Viikki in Finland. Results from this test were presented after 5 years’ exposure ( IRG/WP 97-30139), and showed that the resistance of acetylated wood wit...
P Larsson Brelid, M Westin
Visual Inspection – How Important is the Influence of the Evaluator?
2013 - IRG/WP 13-20521
Visual inspection is often a crucial means of judging the efficacy and performance of a preservative. It is used in non-destructive testing in long term exposure trials or simply, when the practical use and precision of the human eye is a good means of measure. As for the procedure described in EN 252, the impression of softness due to decay of the wood has also to be considered. Although, a thumb...
M Klamer, P Larsson Brelid, I Stephan
Potential valorization of wood extractives from waste products of steam distillation of Aniba rosaeodora: antitermitic activity
2013 - IRG/WP 13-30629
Aniba rosaeodora, is a slow growing evergreens of the Lauraceae family which are indigenous over a wide range of the Greater Amazon Region (the Guianas and Venezuela, Brazilian Amazon…). The essential oil obtained from the wood has a characteristic aroma and is a long-established ingredient in the more expensive perfumes. The wood is also composed with alkaloid compounds like anibin. These compo...
N Amusant, A Digeon
Estimation of service life of treated wood in ground contact based on early indicators
2013 - IRG/WP 13-20536
A well-known problem with field testing is that it takes a long time before meaningful and reliable results are achieved. Only when a trial has come to an end the so called average life for the samples in a group can be calculated and compared with other samples. The aim of the present study was to investigate if it is possible to get a reasonable and good estimation of the average life long befor...
M Hansson, J Jermer, P Larsson Brelid, N Terziev
Resistance against marine borers: About the revision of EN 275 and the attempt for a new laboratory standard for Limnoria
2020 - IRG/WP 20-20669
Wood protection technology in the marine environment has changed over the last decades and will continue to do so. New active ingredients, newer formulations, and novel wood-based materials including physically- and chemically-modified wood, together with increasing concerns over environmental impacts of wood preservatives, urgently demand a major revision of EN 275 “Wood preservatives – Deter...
S Palanti, S Cragg, R Plarre
Copper-octanoate - a potential reference preservative replacement for CCA in field test standards?
2022 - IRG/WP 22-20688
Finding a CCA reference replacement for use in standardised test methods is of high priority since this chemical is being phased out and may in the near future be banned also for experimental and approval purposes. In this paper we assess the possibility to replace CCA reference preservative with an historical copper octanoate product. There is a huge amount of lab and field test data available fo...
R Ringman, M Westin, M Klamer, A Christof, F Friese
Mini-stakes – an alternative test method for EN 252?
2023 - IRG/WP 23-20691
Market approval of wood treatment products requires knowledge and prove of long-term durability. Efficiency of wood treatment with a specific product is evaluated based on variety of tests, including penetration evaluation, leaching studies as well as decay tests. EN 252 standard test is a core method for wood durability evaluation in a ground contact, both for commercial product approval and scie...
R Digaitis, P Larsson Brelid, N Terziev, M Klamer, A W Christof, J Stenaek, N Morsing
Field durability testing of wood above ground - Part 1: 15 years’ experience with the Bundle method
2023 - IRG/WP 23-20695
A ‘jack of all trades’ method for above-ground wood durability testing has been sought for decades, but until now no method has found its way into standardization. The method of choice shall be applicable for untreated and treated wood – ideally also for wood composites. It shall be reproducible, objective, fast, easy, and inexpensive. Finally, it shall provide high predictive power.
This s...
C Brischke, G Alfredsen, L Emmerich, M Humar, L Meyer-Veltrup
Field durability testing of wood above ground - Part 2: The full guideline of the Bundle method
2023 - IRG/WP 23-20696
To determine the biological durability of wood above ground, numerous approaches for test methods have been pursued and tried out in the field in the past. So far, no method has managed to find its way into a European standard. During the last 15 years, experience with the Bundle method has been gained. As described in Part 1 of this paper, the method is recommended as a suitable tool for determin...
C Brischke, G Alfredsen, L Emmerich, M Humar, L Meyer-Veltrup
JWPA method for testing effectiveness of surface coatings with preservatives against decay fungi
1981 - IRG/WP 2164
In 1979 JWPA established a new method for testing effectiveness of surface coatings in accordance with practical use of preservative-treated lumber. Comparing the new testing method with JIS A 9302, a few new trials - size of wood specimen, weathering procedure, and decay-test procedure - are incorporated....
K Tsunoda
How to Document the Performance of Super-Critical Treated Wood in above Ground Situations?
2005 - IRG/WP 05-20316
The paper presents practical experiences from the preparation of a new preservative treated wood product for introduction to the market. The product in question is Superwood™, which is treated with organic biocides using CO2 in a supercritical state as a solvent.
The question is how to evaluate the performance of a new product such as Superwood™ in order to get an acceptance on the market a...
N Morsing, A H H Wong, F Imsgard, O Henriksen
European Biocides Directive (98/8/EC): Programme for systematic examination of all active substances of biocidal products on the market on May 13, 2000 Article 16(2)
2001 - IRG/WP 01-50166-03
PPT-Presentation...
K Rasmussen, A B Payá Pérez
Comité International Permanent pour la Recherche sur la Préservation des Matériaux en Milieu Marin. Information from the Wood Group
1980 - IRG/WP 460
E G B Jones
Report on the activities of the European Standardization Committee CEN/TC 38 'Methods of Testing wood preservatives'
1980 - IRG/WP 279 E
G Castan