Your search resulted in 500 documents. Displaying 25 entries per page.
Influence of bark damage on bluestain development in pine logs
1997 - IRG/WP 97-10197
Mechanized harvesting of conifers can lead to extensive bark damage, with the resulting wounds providing suitable entry points for bluestain fungi that are not associated with bark beetle vectors. However, the amount of bluestain colonisation can vary greatly between the different types of wound. To evaluate the effect of wound type seven different types of wounds were artificially created on fres...
A Uzunovic, J F Webber, D J Dickinson
Weather testing of timber - discoloration
2001 - IRG/WP 01-20221
The brightness and color saturation of the timber were reduced over time. The perception of an increasingly dark color in the timber over time is due to the gradual reduction in brightness. The period from May to September was characterized by the greatest discoloration of all three periods of the year. Because this period has the largest number of sunlight hours, and the timber is subjected to a ...
T Toyoda, M Azuma, Y Hikita
Maintaining the adoption of the equilibrium moisture content in timber by bifluorides under outdoor circumstance
1989 - IRG/WP 3541
A description is given of the practical application of bifluorides, f. ex. Diffusec in maintaining the adaption of the equilibrium moisture content in timber, as a result of a many years observation of treated timber under outdoor circumstances....
H F M Nijman
Effect of leaching temperature and water acidity on the loss of metal elements from CCA treated timber in aquatic conditions. Part 2: Semi-industrial investigation
1995 - IRG/WP 95-50040-13
In continuation of previous leaching research on the quantification and modelling of metal elements released from CCA treated timber, a series of experiments has been carried out dealing with the influence of temperature and pH of the relative aquatic environment. The leaching method used is the Dutch prestandard for building materials, a long term static leaching test simulating practical bank-sh...
G M F Van Eetvelde, W J Homan, H Militz, M Stevens
Timber Preservation and Sustainable Construction in Australia
2005 - IRG/WP 05-50224-14
Sustainable development has been described as meeting the needs of the present without compromising the ability of future generations to meeting their own needs. (Bruntland 1987) To achieve the sustainable development goal therefore, the maximum performance has to be obtained from existing resources (timber) so that the remaining resource is protected from over-exploitation. Clearly, wood preserva...
J Norton
A laboratory evaluation of the susceptibility to biological attack of glued laminated pine timber
1991 - IRG/WP 2387
In the scope of a research programme concerning the use of maritime pine (Pinus pinaster) to produce glued laminated timber structures in Portugal, the natural durability of this material was checked by using laboratory test methods. An European standard, EN 113, was used to test durability against basidiomycetes and a test method developed at LNEC for termites was adapted for this purpose. From t...
L Nunes, H Cruz
Co-operative Field Experiment: Performance of preservative-treated timber: Report on condition of specimens after seven years installed in New South Wales - Australia
1986 - IRG/WP 3362
R S Johnstone
Work program of CEN/TC 38 (April 1993). Durability of wood and wood-based products
1993 - IRG/WP 93-20012
R Hüe
A risk model for termite attack in Australia
2003 - IRG/WP 03-10468
This paper describes a model to predict the risk of termite attack on a house in Australia. It is based on a survey of expert opinion and data from 5000 houses. The model gives a quantitative estimate of risk, and as such is useful for the development of risk management systems. An example of the application of such a system is given....
R H Leicester, C-H Wang, L J Cookson
Field trials on preserved timber out of ground contact
1978 - IRG/WP 3154
This report describes two different field trials studying the performance of preservative treatments on timber exposed to the weather, but above the ground. Results are presented on the protection afforded against decay, and on the efficiency of water-repellent preservative treatments in controlling the uptake of moisture by the timber. Proposals for a standard field test system are briefly discus...
D F Purslow, N A Williams
Termite standards questionnaire survey - First Report
1988 - IRG/WP 1354
Information contained in replies received from IRG members responding to the termite standards questionnaire survey are summarised. Highlighted in the results of this first report are the major termite species in the various zoogeographical regions, their damage ranking to timber-in-service, the chemicals used in control methods, and the status of termite standards in the respondent countries....
J R J French, J P La Fage
Wood preservation in Spain
1983 - IRG/WP 3266
This report includes some statistical data on the potential of Spanish forests and the country's timber consumption as well as detailing the extent of development of the wood products industries, and will help to give a better understanding of the use of this raw material in Spain. The main biological deteriorating organisms which damage wood are given and the capacity of the industrial t...
A Lopez de Roma, R Cockcroft
Natural durability of some commercial timbers of Sarawak, Malaysia in tropical marine environment
2005 - IRG/WP 05-10561
The abundant supply of timber resources in Sarawak makes timber an ideal choice to be used for marine construction. The natural durability of the main commercial timber species of Sarawak in ground contact is well established but the same is not available for marine environment.
This study was conducted to assess the natural durability of 28 commercial timber species in tropical marine environmen...
K Jenang, Wang Choon Ling
Heat treated timber in Finland
2000 - IRG/WP 00-40158
Heat treatment permanently changes the physical and chemical properties of wood by means of high temperatures (150 - 240°C). Heat treatment darkens the colour of the wood. Heat treatment improves the equilibrium moisture content of the wood and the shrinkage and swelling of the wood is reduced. Very high temperatures improve the resistance to rot and also reduce the susceptibility to fungal decay...
T Syrjänen, E Kangas
Results of field tests on the natural durability of timber (1932-1975)
1976 - IRG/WP 3105
This paper describes a continuing field stake trial to determine the natural resistance of different species of timber to decay. Data are presented for about 180 timbers, covering over 6000 stakes, and the results are discussed in terms of a natural durability classification....
D W Purslow
Recycling of impregnated timber: Part 2: Combustion trial
1999 - IRG/WP 99-50132
Totally 270 m3 (61,3 t) of CCA impregnated wood was chipped and incinerated at the combustion plant of Jalasjärvi. After the normal gas cleaning venture scrubbers were tested. After the trial a metal balance was calculated. Ash was treated at the copper smelter of Outokumpu Harjavalta Metals Oy. Condensate waters were transfered to the Outokumpu's CCA production plant and utilized by the...
L Lindroos
Final report on world survey of sap displacement impregnation of timber
1975 - IRG/WP 345
The present contribution to the World Survey of Sap Displacement Impregnation of Timber covers the information received since the presentation of the interim report to the 6th Annual Meeting of the International Research Group on Wood Preservation held in Vienna, 20th June 1974....
F B Shorland, C G W Mason
Damage by wood-attacking insects in buildings in Sao Paulo State - Brazil. (including errata slip)
1978 - IRG/WP 175
From 1974 to 1978 up to 602 buildings attacked by wood-boring insects were inspected by Instituto de Pesquisas Tecnologicas in Sao Paulo State - Brazil. Damage was caused mainly by subterranean termites, dry-wood termites and wood-attacking beetles. Up to US $ 1000,000 is the amount needed to control such insects in the buildings inspected...
A T De Lelis
The leachability and specificity of the biological protection of timber using Scytalidium sp. and Trichoderma spp
1986 - IRG/WP 1302
The results of field experiments, using biological control against internal decay of creosoted poles, are briefly reviewed and the evidence concerning the leachability of the antibiotics produced by these species is presented. A pure culture miniblock decay test on biological control treated pine sapwood is described and the results compared to previously published data. The protection against Len...
P I Morris, N A Summers, D J Dickinson
IRG/COIPM INTERNATIONAL MARINE TEST - to determine the effect of timber substrate on the effectiveness of water-borne salt preservatives in sea-water. 3rd Interim Report
1983 - IRG/WP 4101
This paper updates the results of microbiological examination and marine borer assessment of untreated wood samples (15 x 2 x 2 cm³) and samples treated with 3, 6 and 10% CCA and CCB preservatives. Three reference species - Alstonia scholaris, Fagus sylvatica, Pinus sylvestris were used at all the test sites in addition to local species chosen by participants in the test....
R A Eaton
Quality control of microwave treatment of timber after dry rot attack
2001 - IRG/WP 01-40205
In Denmark microwave treatment of timber has been used during the last 15 years for eradication of dry rot (Serpula lacrymans). About 1500 microwave treatments have been employed in coorporation with Hussvamp Laboratoriet. Previously all the infected timber was removed plus an extra metre as a safety zone. This meant that all casting boards and plaster had to be removed as well and joists replaced...
J Bech-Andersen, J Andreasson, S A Elborne
Envelope treatment to protect softwood timbers from damage by subterranean termites
2003 - IRG/WP 03-30313
Two aboveground field trials were conducted in Australia to determine the effectiveness of envelope treatments of deltamethrin and permethrin for the protection of softwood framing timbers against termite damage. Radiata pine Pinus radiata D.Don and slash pine Pinus elliottii Englem., were treated with Tanalithä T (a novel solvent) to achieve 5-mm-depth envelopes. Details of a field trial against...
B C Peters, J W Creffield
The potential for accelerated ageing to determine the persistence of active ingredients in timber
2006 - IRG/WP 06-20323
Fast screening methods for evaluating the persistence of active ingredients in timber are proposed. This is an outline proposal which is intended to provoke discussion and further development of the methods. Reliable and accurate analytical methods are key to these tests....
L D A Saunders, M R Powell
Developments in wood preservation processing techniques in New Zealand
1980 - IRG/WP 3143
P Vinden, A J McQuire
Wood preservation in Turkey
1982 - IRG/WP 3216
The report reviews the forestry potential of Turkey and also the historical background of wood preservation in the country. The wood preservation industry in Turkey is mainly concentrated on the treatment of poles and railway sleepers. There is no official body responsible for wood preservation activities, and therefore its promotion depends mainly on the voluntary research efforts carried out by ...
R Ilhan, R Cockcroft