Your search resulted in 722 documents. Displaying 25 entries per page.
A new type of biocide suitable for use in different fields of wood preservation
1993 - IRG/WP 93-30014
A new type of polymeric biocides was developed containing quaternary ammonium and boron ester groups as active structure elements, to overcome the disadvantages of AAC's in wood preservation use and to utilise their good performance due to a broad efficacy against fungi on the other hand. The new biocides called polymeric betains have been tested in laboratory and field tests and especial...
V Barth, H Härtner
Survey of conditioning treatment practices in the Philippines
1975 - IRG/WP 349
The wood preservation industry in the Philippines is at present beset by many problems. An association of the industry similar to those existing in other countries has only been initiated last year by FORPRIDECOM. It is hoped that the formal organisation of this association will bring into focus the importance of this particular industry in the economic and industrial development of the country. L...
R F Casin
Tilting and vacuum treatment - two methods to obtain a non-dripping freshly treated timber
1989 - IRG/WP 3535
Modern impregnation plants are designed to prevent spread of impregnation solutions from the plant through leakage, etc. It is also important that freshly treated timber does not spread solutions through dripping on the storage area. To prevent this, the impregnation procedure is terminated with a vacuum period. In many plants in Sweden this period is minimized or even excluded to gain time. Inste...
I Johansson, M-L Edlund
A new vacuum/pressure plant system
1988 - IRG/WP 3479
In the subtropical regions, the problem of wood supplying becomes more and more difficult to be solved. In that context, the Centre Technique Forestier Tropical had paid a particular attention to the valorization of products issued from plantations in dry zones of Africa. In these plantations, the products of clearings can be used as fencing, stakes or for traditional construction. However in thes...
C Dalois, R Schwartz, G R Y Déon
Chemical and biological investigations of double-vacuum treated windows after 7½ years in service
1985 - IRG/WP 3339
Earlier investigations of double-vacuum treated windows after five years in service have shown that tributyltin oxide (TBTO) degrades to di- and monobutyltin compounds and that the resistance of the wood against decay decreases. An investigation 2.5 years later of the same windows shows that the degradation of TBTO proceeds fast. After 7.5 years in service only 15-35% of the remaining organotin co...
M-L Edlund, J Jermer, B Henningsson, W Hintze
Characteristics of thermally modified wood in vacuum
2004 - IRG/WP 04-40287
In commercial thermal wood modification processes nitrogen, steam or oil has been used for the reduction of oxygen content in the reactor atmosphere. In present study no special heating medium, but an initial vacuuming step has been used for this purpose. Mass loss, resistance to fungal decay, dimensional stability, bending strength and modulus of elasticity of heat treated wood were evaluated and...
G Rep, F Pohleven, B Bucar
Effectiveness of wood preservatives and treatments against marine borers in Philippine waters
1976 - IRG/WP 416
A 5-year exposure test was conducted on the effectiveness of wood preservatives and treatments against marine borers in Philippine waters. Air-dried heartwood samples of apitong (Dipterocarpus grandiflorus) 76.2 x 88.9 x 609.6 mm³ (3 x 3.5 x 24 in³) in size were pressure treated with coal tar creosote and two types of CCA (copper/chrome/arsenic) and CuCZA (copperized chromated zinc arsenate) wat...
F R Siriban, M G Laxamana, P G Mata
Application of paint primers after light organic solvent preservative treatment
1986 - IRG/WP 3381
The application of three alternative paint primers is investigated, including a slow-drying oil-based primer, a fast-drying oil-based primer, and a fast-drying water-based primer. The treatment schedules employed, in particular the evacuation period after treatment, have a marked effect on subsequent paintability. Priming can potentially be carried out immediately after treatment with approved Tim...
P Vinden
The potential of silicone-based formulations to enhance wood properties through industrial treatment for outdoor use
2011 - IRG/WP 11-30578
High hygroscopicity is one of the main weaknesses of wood as far as its susceptibility to biodegradation, and specifically to fungal decay. New wood preservation technologies are constantly entering the wood protection market, competing with traditional, biocide-based preservation. Silicones are commercially used as hydrophobic agents on stones and concrete. They belong to the restricted number of...
F Simon, F Marchal, F Pochon, M Kutnik, I Le Bayon
Limited variability in biological durability of thermally modified timber using vacuum based technology
2011 - IRG/WP 11-40567
The SmartHeat® thermal timber treatment is a new technology based on the process parameters being steered very precisely mainly due to the vacuum applied and heating system involved. Timber treated with this technology shows a potential for less variability of biological durability in one batch. Several batch treatments were sampled and assessed on statistical variability of decay resistance agai...
J Van Acker, S Michon, J Van den Bulcke, I De Windt, B Van Swaay, M Stevens
Effect of the nature of the inert atmosphere used during thermal treatment on chemical composition, decay durability and mechanical properties of wood
2013 - IRG/WP 13-40625
Wood heat treatment is an attractive alternative to improve decay resistance of low natural durability wood species. Nowadays, several types of thermal treatments of wood exist. These treatments differ mainly by the nature of the inert atmosphere used to avoid wood combustion which may correspond to: nitrogen, vacuum, steam or oil. Decay resistances as well as mechanical properties are strongly co...
K Candelier, S Dumarçay, A Pétrissans, M Pétrissans, P Gérardin
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 such as work in bending (WB) and Brinell hardness. In addition, the equilibrium moisture content after exposure of 12 months and subse...
G Behr, A Gellerich, S Bollmus, H Militz
Treatability of beechwood railway sleepers with potential creosote substitutes
2017 - IRG/WP 17-40790
Maintenance of an efficient railway infrastructure still requires the use of wooden railway sleepers, particularly because wooden sleepers have more favourable properties for intensified vibrations than concrete or steel sleepers. Creosote, used for decades for the impregnation of railway sleepers, will possibly no longer be available for this application due to European legislation. This reveals ...
N Pfabigan, E Habla, R Gründlinger
Review on protection of timber bridges in Norway and other countries
2017 - IRG/WP 17-40809
Wood plays a major role in design and construction of modern bridges in Norway. Typical elements of those bridges are double impregnated glued laminated members, stress laminated timber decks, slotted-in steel plates, metal cladding of the surfaces of loadbearing members, and cross girders made of steel. Selected examples of timber bridges in Norway are presented. This review paper gives an overvi...
K-C Mahnert, U Hundhausen
Non-vacuum/pressure ACQ treatment
2023 - IRG/WP 23-40971
Many developing countries are located in sub-tropical or tropical regions where rapid wood deterioration results in early failure of many structures. Whilst preservative treatment would help to reduce these losses and extend the forest resource commercial vacuum pressure treatment systems are often too expensive. The use of lower technology treatment systems, while not as quick as vacuum pressure ...
J Norton
Proposal for further work on accelerated ageing
1988 - IRG/WP 2314
M-L Edlund
Status of the research and development of a new preservative system (EFPL) for pressure treatment of spruce in Canada
1975 - IRG/WP 348
Our work has been to develop a system which would have the stability of the ACA system and the formulation flexibility of the CCA system enabling properties such as fixation of arsenic, water repellency, appearance and cost to be controlled. Our permeability studies of spruce using a method previously developed indicated that an ammoniacal solution of copper arsenate is an excellent candidate for ...
J Rak, M R Clarke
IRG/COIPM INTERNATIONAL MARINE TEST - to determine the effect of timber substrate on the effectiveness of water-borne salt preservatives in sea-water. Progress Report 2: Report of treatment and installation in Australia
1978 - IRG/WP 440
The purpose of this test and the procedures to be followed have been fully set out in documents distributed by the International Research Group on Wood Preservation and numbered IRG/WP/414 and IRG/WP/420. The prescriptions set out in these two documents have been closely followed....
J Beesley
Field test evaluation of preservatives and treatment methods for fence posts
1985 - IRG/WP 3347
This work presents the field test results after fifteen years exposure of Eucalyptus saligna fence posts treated with six different preservatives and five treatment methods. All the combinations with oil-borne preservatives presented the best results and among the waterborne preservatives, the fence posts treated by immersion method were with the lowest performance in the field test....
G A C Lopez, E S Lepage
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
Performance of treated fence posts after 6 years in five test plots in the State of Sao Paulo - Brazil
1976 - IRG/WP 376
Fence posts treated with creosote, pentachlorophenol and creosote/ pentachlorophenol mixtures showed good performance after 6 years of exposure in five test plots located in the State of Sao Paulo - Brazil. Good results were also achieved with copper sulphate/sodium arsenate and copper sulphate/potassium dichromate mixtures. Fungi and termites were the main destroying agents found attacking the po...
M S Cavalcante
The dry rot fungus Serpula lacrymans. Examples of attack and remedial treatment
1988 - IRG/WP 1347
The film deals with several aspects of dry rot attack and eradication in buildings. The detailed biology and morphological charasteristics of the fungus are portrayed. The various forms of mycelial growth, the role of the strands in the nourishment and spread of the fungus, as well as the many types of fruitbody formation are outlined. Environmental and nutritional requirements of the fungus as we...
G Buchwald, B M Hegarty, W Metzner, R Pospischil, H Siegmund, P Grabow
Strength loss associated with steam conditioning and boron treatment of radiata pine framing
1987 - IRG/WP 3438
The combined effect of included defects and wood moisture content on the strength loss of second rotation radiata pine framing following conventional steam conditioning is investigated. The green Modulus of Elasticity (MOE) is reduced by approximately 13% after steaming. When dried after steaming, however, neither the MOE nor MOR is significantly different from unsteamed dried controls....
M J Collins, P Vinden
Soft rot penetration - Effect of groundline maintenance treatment on poles in sevice
1983 - IRG/WP 3263
R S Johnstone
Improved techniques designed for evaluation of fungicides in soil for control of dry rot fungus Serpula lacrymans
1985 - IRG/WP 2238
Improved techniques provide a laboratory method for the evaluation of chemicals in soil for control of dry rot fungus Serpula lacrymans. Results with their application to three chemicals were reported. These techniques are useful to eliminate chemicals lacking the necessary toxicity and weatherbility for dry rot control when the chemicals have been applied to the soil....
M Takahashi, K Nishimoto