Your search resulted in 859 documents. Displaying 25 entries per page.
Natural durability of larch heartwood against decay
1997 - IRG/WP 97-10201
Larch heartwood has been promoted in Sweden and in other European countries as an alternative to preservative treated timber. It has even beeen stated that larch heartwood is more durable than preservative treated timber. This paper presents a compilation of facts from scientific reports on the durability of larch heartwood. Some recent data from this department are also reported. All data suggest...
T Nilsson
New ways of chemical wood preservation
1997 - IRG/WP 97-40087
Synergistic effects pertaining to wood preservation have been investigated by combining different polymerizing agents with modifying chemicals, modifying chemicals with known preservatives and new types of preservative chemicals with each other. One of the investigated methods is the use of impregnating solutions based on furfuryl alcohol (produced from biomass), in which the chemicals polymerizes...
M Westin, T Nilsson, B Ohlsson, R Simonson
Evaluation of the effectiveness of defence anti-stain in the control of sapstain in laboratory and field tests
1990 - IRG/WP 3593
The anti-sapstain product Defence Anti-stain (DAS) has been evaluated internationally in laboratory and field tests during the years 1988 and 1989. Results of tests carried out by institutes and by own companies in countries like Indonesia, Ivory Coast, Japan, Portugal, Belgium, The Netherlands and Spain will be presented. In the several tests Defence Anti-stain showed a high fungicidal activity t...
G Rustenburg, C J Klaver
Standard principles of testing termiticides: A discussion paper
1991 - IRG/WP 1502
Recent restrictions and banning of termiticides such as organochlorines in some countries has focussed attention on the need for new and novel compounds as termiticides. However, this poses problems for both wood preservative manufacturers and termitologists. Test procedures have to be devised to evaluate the new termiticides so that the tests are practical, encourage vigorous termite activity, an...
J R J French
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 19: Report on the condition of specimens at Sekondi, Ghana after 42 months
1984 - IRG/WP 4109
The results of the first formal inspeation of CCA- and CCB- treated test panels exposed at Sekondi, Ghana, in June 1980, are presented. All untreated control panels of both reference and local species have been destroyed. Of the% CCA- treated specimens, only those of Pinus sylvestris (reference species) and Mitragyna stipulosa (local species) have not been attacked. 3% CCB-treated local species ha...
F F K Ampong
Mobility and bioavailability of wood preservation chemicals in soil - actual field measurements
1998 - IRG/WP 98-50101-11
Wood material intended for outdoor use is often impregnated with chemicals to withstand attack from fungi and bacteria. Both inorganic and organic substances are used to protect the wood, and they are used in a toxic and bioavailable form. At wood preservation facilities severe soil contamination can be encountered due to spills and deposition of sludge, especially at old sites. Two sites, one whe...
S Andersen, G Rasmussen
Characterization of Poria indoor brown-rot fungi
1995 - IRG/WP 95-10094
The heterogeneous group of "Poria" fungi causing brown rot in buildings and also of wood in ground contact comprises Antrodia vaillantii, Antrodia serialis, Antrodia sinuosa, Antrodia xantha and Tyromyces placenta. These fungi have similar morphological appearance and biology. Their nomenclature has a confusing history and is still not uniform. As a consequence, misinterpretations may occur. SDS p...
O Schmidt
Protection of rubberwood timber. Part 1: Impregnation with boron preservatives
1989 - IRG/WP 3551
Rubberwood (Hevea brasiliensis) were treated with a 3% proprietary mixture of borax/boric acid using three different treatment schedules i.e. full-cell, full-cell to refusal and full-cell with 12 cycles of vacuum/pressure. Freshly cut samples had mean preservative retentions of 187 kg/m³, 214 kg/m³ and 178 kg/m³ respectively. Pre-air dried samples for one week had retentions of 252 kg/m³, 308 ...
L T Hong, C C K Liew
Natural resistance of twenty-five timber species to marine borer attack in Goa waters (India)
1992 - IRG/WP 92-4178
Natural durability of 25 species of Indian timbers has been discussed, based on data collected from test panels exposed in Goa waters (west coast of India. for a period of 7 months. All the timber species, except Cleistanthus collinus, were heavily destroyed within 7 months on account of the combined attack by Martesia striata (Linnaeus) and Lyrodus pedicellatus (Quatrefages). Cleistanthus collinu...
L N Santhakumaran, G Srimannarayana, K Nagaiah
Step-wise pressure process for reducing surface roughness in Japanese cedar timber
2003 - IRG/WP 03-40256
Sixteen dried sawn-timber (10.5 x 10.5 x 360 cm) were cut into half. The half of them was treated by step-wise pressure process with 2.5 MPa maximum, and the other half was treated by conventional pressure process with 2.5 MPa maximum. Average DDAC preservative absorption was 461 kg/m3 in the former and 525 kg/m3 in the later. Surface roughness was expressed as the profile element height of collap...
K Yamamoto, M Nozoki
Domestic wood preservation - Remedial treatments in Australia
1978 - IRG/WP 3128
Domestic construction in Australia relies heavily upon timber. Because of availability, local conditions and building practices, the timbers and other materials employed vary considerably between the States. In recent years, the timber floor has given way to 'raft construction' (concrete slab-on-ground). Not surprisingly, there is a tendency in each State to use local timbers for...
J Beesley, H Greaves
Service Life Prediction of Wood Claddings by in-situ Measurement of Wood Moisture Content
2004 - IRG/WP 04-20304
The Danish Technological Institute is in co-operation with industry partners running a project aiming at predicting the service life of different wood protecting systems.
The project focuses on examining the moisture reducing effect of different wood claddings and the ability to maintain the appearance of the surfaces, when the wood is used in service class 3.
A façade construction is exposed t...
B Lindegaard, N Morsing
Suitability of propiconazole (R 49362) as a new-generation fungicide
1989 - IRG/WP 3529
Propiconazole (R 49362), an anti-fungal triazole-compound of Janssen Pharmaceutica, has been extensively tested to determine its potential use as a wood preserving fungicide. Various tests in both private laboratories and official institutes indicate a good activity against Basidiomycetes (brown and white rot) and Ascomycetes (blue stain-in-service). The active ingredient seems very resistant to w...
A R Valcke
Gaseous treatment of timber with allyl isothiocyanate. Fungicidal and insecticidal effects
1996 - IRG/WP 96-30108
Gaseous treatment with allyl isothiocyanate (AIT) was tested for its effects on the growth of microorganisms on the wood substrate and the mortality of subterranean termites and powder-post beetles. Toxic limits of AIT were determined as concentrations in the air when an AIT-treated filter paper was placed in a sealed container with fungus-inoculated wood specimens. Those were <3.8 ppm for Aure...
K Tsunoda, T Yoshimura
Dutch work programme for environmental measures in wood preserving industry
1993 - IRG/WP 93-50001-30
Since the carly eighties, it has emerged that somewhat severe environmental problems exist in a significant number of wood-impregnating plants. Regular, structural emissions of such materials as hydrocarbons, and e.g. substances defined as requiring urgent attention, occur into the air, soil and water, including groundwater. This has been established by various investigations and an orientative in...
P Pasveer, H Militz, W J Homan
Wood Preservation in the Federal Republic of Germany
1981 - IRG/WP 3157
The report gives some statistics about the forest products industries in the Federal Republic and a general review of the wood preservation industry. The trend in the use of wooden railway sleepers is decreasing, as is the use of poles. The sale of other pre-treated timber, mainly fence posts, palisades and domestic fences, is however slightly increasing. Apart from the use of pressure treatments ...
R Cockcroft, H Willeitner
Fouling assemblage development on copper-chromium-arsenic-treated timber submerged in European waters
2002 - IRG/WP 02-50181
The effect of the anti-marine-borer timber preservative CCA on community development of non-target marine fouling animals was investigated. Panels of Scots pine treated to target retentions of 12, 24 and 48 kg CCA per m3 of wood, plus untreated controls were submerged at seven coastal sites (Portsmouth, UK; La Tremblade (2 sites), France; Ria Formosa, Portugal; Sagres, Portugal; Kristineberg, Swed...
C Brown, R J Eaton, S M Cragg, P Goulletquer, A Nicolaidou, M J Bebianno, J Icely, G F Daniel, T Nilsson, A J Pitman, G Sawyer
Assessing health risks to occupants following remedial insecticidal treatment of timber in dwellings
1998 - IRG/WP 98-50101-27
Experiments have been carried out to assess (i) the aerial concentrations of volatile wood preservative constituents, and (ii) the potential for contamination from treated surfaces, following in situ insecticidal treatment of timbers in dwellings. Using white spirit as a model for volatile constituents in the treatment of free-standing, wood-lined chambers indicated that temperature and air exchan...
R J Orsler, E D Suttie, V Rijckaert
Deterioration and preservation of Japanese pampas grass as a roofing material
1991 - IRG/WP 1490
The deterioration and preservation of Japanese pampas grass as a roofing material were investigated. The pith of stem and sheath were more rapidly decomposed. The vessels were the most important pathway of microbial prevalence. Hyphae invaded into the cell wall of fiber and parenchyma, and made the cavities with conical ends. The contacting cell wall of parenchyma in pith with hyphae was decompose...
K Fukuda
Report on the efficacy and performance of the insecticide candidate termiticide in H2 field trials
2004 - IRG/WP 04-10516
This paper explains the field results of phenol pyrazole treated timber against in an above ground mound colonies of Coptotermes acinaciformis (Froggatt). C. acinaciformis (‘termites’) are the major pest of human structures throughout tropical and sub tropical regions, causing billions of dollars in damage to timber-in-service worldwide. The result of this field test have shown that candidate ...
B M Ahmed, P Vinden, J Hann, J R J French
Facts or feelings to decide on wood preservation
1988 - IRG/WP 3480
Feelings against the use of chemicals in general and of wood preservatives in special get increasing importance within the population. They are based mainly on an uncertain fear for unknown health risks and vary between different countries and regions. No straight line can be traced. Nevertheless feelings often will influence a decision against chemical wood preservation. Therefore they have to be...
H Willeitner
New methods for nondestructive inspection of timber in buildings
1995 - IRG/WP 95-20070
In these years older buildings are renewed in most European countries on a large scale, and new techniques are needed for both inspection and eradication of fungal attacks. Heat treatment as a means of eradicating the dry rot fungus has been used in Denmark during the last decade. This technique minimises the structural damage to the building, whilst at the same time reducing costs by up to 50%. T...
B Madsen, O V Frederiksen
Termatrac: microwave technology for non-destructive detection of insect pests in timber
2002 - IRG/WP 02-20253
Termatrac is a microwave instrument that has been developed in Australia to detect termite movement within timber and wall cavities. We present data from an investigation into the usefulness of the instrument in detecting drywood and subterranean termites in timber. The West Indian drywood termite Cryptotermes brevis (Walker) was detected in a wooden chair. The subterranean termites Coptotermes ac...
B C Peters, J W Creffield
Wood Preservation in Belgium
1981 - IRG/WP 3170
The report reviews wood preservation activities in Belgium and notes the number of authorized treatment depots has doubled during the past five years. It lists the timbers that are allowed to be used for joinery and constructional building purposes and the preservatives and treatments with which these timbers may be protected. In Belgium not only have the wood preservative product and its treatmen...
M Stevens, R Cockcroft
Preservation of wood composites with zinc borate
1995 - IRG/WP 95-30074
Inorganic borates such as boric acid, borax, disodium octaborate tetrahydrate, and zinc borate can be incorporated into wood composites such as waferboard to impart decay and insect resistance to the final product. Zinc borate is especially well suited for this application due to its efficacy and leach resistance. The paper summarizes the work performed to date in this area. The effects on strengt...
P E Laks, M J Manning