Your search resulted in 3388 documents. Displaying 25 entries per page.
Statement on laws relating to wood preservation in Brazil
1977 - IRG/WP 399
A set of copies of the laws relating to wood preservation in Brazil (in Portuguese) have been deposited with the IRG Secretariat. Generally speaking, it can be said that all public constructions have to comply with the laws that have been laid down. All organisations (governmental and private) which produce or apply wood preservatives are registered. The private sector is not obliged to abide by t...
P Karstedt
Recycling and disposal of timber treated with waterborne copper based preservatives
1993 - IRG/WP 93-50008
Recycling and disposal technologies are briefly reviewed. Details are given of chemical extraction techniques suitable for recovery of copper from timber treated with a new copper based preservative, and traditional chromium based products. Details of thermal decomposition tests according to the DIN 53436 protocol under flaming and non-flaming conditions are given. The decomposition products were ...
J A Cornfield, S Vollam, P Fardell
Further steps in the development of above ground wood preservative systems
2002 - IRG/WP 02-30300
Metal and organo-metallic wood preservative systems have provided the consumer with cost effective wood preservative systems which satisfy the performance requirements in a wide range of end uses.
With increasing environmental and legislative control, metal-free formulations have emerged as the dominant preservative systems for the protection of timber in the lower hazard classes.
In higher ha...
P Warburton, A S Hughes
Chemostimulatory and chemotropic responses by fungi to preserved and unpreserved wood
1981 - IRG/WP 1134
During experiments to determine the presence of biotic connections between soil and wood at this laboratory, marked chemotropic responses to wood were demonstrated by some wood destroying micro-organism in agar culture. These were shown at some distance from bait, up to 35 mm away, and on some occasions were unaffected by the presence of toxic materials. This paper provides preliminary data on the...
G Mowe, B King
Protection and efficient utilization of plantation grown lesser-known timbers of arid region in India - Acacia tortilis, Prosopis juliflora and Prosopis cineraria
2005 - IRG/WP 05-40321
The plantation-grown timbers are highly susceptible to insects/pests, borers and wood rot fungus. Wood preservatives copper chrome arsenic (CCA) 2% and chloropyriphos 2% solution treated under pressure on three plantation grown timber species viz. Acacia tortilis, Prosopis juliflora and Prosopis cineraria have shown encouraging results in enhancement of shelf life by protection of wood against woo...
S H Jain, H Kumar, R Arya, R L Srivastava
Biological test, AAS and EPR study of copper monoethanolamine complex with quaternary ammonium compounds as a wood preservative
2003 - IRG/WP 03-30321
Experiments were carried out on the wood preservative with a strong fungicidal activity based on Cu(II) carbonate, 2-aminoethanol (monoethanolamine) and quaternary ammonium compound (QAC). The object of the performed investigations was sapwood of Scots pine (Pinus sylvestris L.) treated with Cu-EA-QAC formulation. Mycological investigations were carried out according to EN 113 and EN 84 standards....
B Mazela, I Polus, S K Hoffmann, J Goslar
Inorganic preservative levels in soil under treated wood decks after 8 years natural exposure in Borås, Sweden
2005 - IRG/WP 05-50233
Inorganic preservative components (Cu, Cr and As) were measured to a depth of 150 mm under deck structures made with Scots pine lumber treated with several different wood preservatives and installed in Borås Sweden 8 years ago. Higher contaminant levels were observed mainly under the drip lines and in the top 50 mm of soil. Under CCA treated decks, soil arsenic concentrations increased from ba...
P A Cooper, Y T Ung, M-L Edlund, J Jermer
Performance of water-borne pressure treated fence posts - A practical application of the new Canadian field test data base
1988 - IRG/WP 2305
50 years of test plot data acquisition have been recently set up as a computerized database. The new database which contains information on the service life of a great number of non durable Eastern Canadian wood species treated with various preservatives and many application processes is presented. As an example for its use, a summary of the performance of fence posts treated with waterborne prese...
E E Doyle, R Dubois, J P Hösli
Laboratory versus field tests for evaluating wood preservatives: A scientific view
1995 - IRG/WP 95-20076
The relative merits of field tests versus laboratory tests for evaluating wood preservatives are discussed. Many of the problems involved in interpretation of the results are similar for both types of test. One major problem is to select field sites or laboratory tests that are representative for the practical use of treated timber in ground contact. Decay tests with treated wood in unsterile soil...
T Nilsson, M-L Edlund
Performance criteria for approving new wood preservatives for ground contact
1994 - IRG/WP 94-20021
Protocols for testing novel formulations prior to approval or registration as wood preservatives are being developed in a number of countries, e.g. Australia, New Zealand, USA. One aspect which must be addressed is the effectiveness in tests relative to that of currently approved formulations which would be acceptable to approving authorities. It is assumed that natural exposure testing is a prere...
M E Hedley
Pollution in wood preservation - Aspects and problems
1973 - IRG/WP 55
In the field of wood preservation too, pollution problems have to be considered. They originate with the wood preservatives used. The extent of pollution differs widely with the type of preservative and the treatment process used. Per unit of impregnated timber, pollution will be lower if treatment is performed in treating plants than in distributed places. It will be highest for the old type Bouc...
H Willeitner
Inter-laboratory comparison of assessment methods for wood preservatives against subterranean termites: Determination of protection threshold limits for CCA
1999 - IRG/WP 99-10317
In 1996, several institutes conducted laboratory bioassays on the efficacy of unleached Pinus radiata specimens treated with copper-chromium-arsenic (CCA) and copper naphthenate (Cu Naph) at retentions of 0.5, 1.0, 2.0 and 4.0 kg/m3 (total salt for CCA; elemental copper for Cu Naph) against a range of species of subterranean termites (IRG/WP/96-10174). Each participant employed the standard test m...
J W Creffield, M Lenz
Evaluation of wood preservatives for Nordic wood preservation class AB
2002 - IRG/WP 02-30297
In the Nordic countries there are restrictions in the use of wood preservatives based on chromium and arsenic. For above ground use, class AB according to the Nordic system, only
copper based preservatives are allowed in Sweden. Thus several new preservatives, copper based or metal free are now used. They have been approved by the Nordic Wood Preservation Council after passing laboratory tests ag...
M-L Edlund, J Jermer
Ecotox Testing of Leachates as an Alternative Approach for Environmental Impact Assessment of Wood Preservatives
2002 - IRG/WP 02-50185
Driven by the implementation of the EU Biocidal Product Directive (BPD) in the environmental assessment of treated wood different methodologies and test strategies are at present under discussion within industry, regulatory authorities and standardizing comittees.
Test procedures for the analytical determination of emissions to different environmental compartments according to exposure scenario...
H-W Wegen
Method to determine the depth of penetration of the biologically active components of wood preservatives
1978 - IRG/WP 2108
A time-saving method for determining the depth of penetration of the biologically active components of wood preservatives is described. The test specimens were obtained by cutting thin slices from the wood either parallel or perpendicular to the treated surface. The slices were then exposed to fungal attack. A good correlation was found between the test results obtained by the modified German Stan...
H-P Sutter
A field test on susceptibility of wood-based board materials to moulds
1989 - IRG/WP 3545
A field test on susceptibility of wood-based board materials to mould growth was carried out under practical, but severe, service-conditions. A total of 19 commercially available composite boards were investigated. It was found that all board materials tested were not completely immune to mould attack. Test results revealed that among the three main categories of wood-based boards involved, partic...
Qiao Wang, B Henningsson
International standardisation: a hypothetical case study with stand-alone borate wood preservatives
1998 - IRG/WP 98-20147
The possibility of developing wood preservation standards with a global remit has a number of obvious advantages as well as far reaching ramifications, many of which are undefined as yet. The commercial implications of adopting international standards are clearly considerable, but equally, such a development is likely to focus attention on the conceptual differences in the way that different regio...
M W Schoeman, J D Lloyd
The wood preservative performance of biocide mixtures containing chlorpyrifos
1994 - IRG/WP 94-30055
Chlorpyrifos (O,O-diethyl[3,5,6trichloro-2-pyridyl]phosphorothioate) was evaluated as a wood preservative insecticide in two long term field tests. In the first project, pine sapwood blocks treated with chlorpyrifos (CPF) were exposed to Coptotermes formosanus using an above-ground test format. CPF is effective in protecting wood from attack by this termite, but its activity appears to decrease wi...
P E Laks
Administration of wood preservative usage in New Zealand
1977 - IRG/WP 395
Principal administration of the preservative treatment of timber in New Zealand is by the Timber Preservation Authority (TPA). The TPA was established in 1955 by Act of Parliament and is under the jurisdiction of the Minister of Forests who appoints its members. Its field staff are Forest Service employees. The Authority comprises twelve members and includes representatives of timber trade associa...
M E Hedley
Biological resistance of wood-based composites under protected, aboveground conditions
2005 - IRG/WP 05-20312
Five kinds of wood-based composites (density fiberboard=MDF, hardwood plywood=HP, softwood plywood =SP, particleboard=PB and aspen oriented strand board=OSB) were tested for their resistance against subterranean termites and decay under protected aboveground conditions. The exposure method was previously developed for evaluating performance of sill plates (dodai) in Japanese homes. Ten replicates ...
K Tsunoda
A comparison of fungal strains used in the bioassay of wood preservatives
1984 - IRG/WP 2220
Previously published data are presented relating to a number of strains of wood-destroying basidiomycetes (Coniophora puteana, Coriolus versicolor, Gloeophyllum abietinum, Gloeophyllum sepiarium, Gloeophyllum trabeum, Lentinus lepideus, Poria placenta, Fibroporia vaillantii and Serpula lacrymans) commonly used as test fungi in the bioassay of wood preservatives. The data, which has not been statis...
J Wazny, H Greaves
The association of bacteria with the increased permeability of water-stored spruce wood
1973 - IRG/WP 325
A microbiological investigation was undertaken to check our earlier work on patterns of bacterial counts and pH changes in water-stored wood. A survey of industrial activity was conducted upstream from the storage site with a view to explaining the existing bacterial flora. Further experiments were carried out with spruce bolts in enclosed tanks, using lake water with its natural bacterial flora a...
J A Dunleavy, J P Moroney, S E Rossell
Microdistribution of water-borne preservatives in blue gum treated by full-cell process
1990 - IRG/WP 3617
The present work deals with the study of the microdistribution of copper, chrome and arsenic elements in Eucalyptus globulus Labill. sapwood, treated with a CCA water-borne preservative by full-cell process, with the help of scanning electron microscopy together with energy dispersion X-ray analysis technique. The work shows that the retention of CCA elements is high in vessels and vasicentric par...
D De Sousa Castro Reimão, J M Palacios
The present status, characteristics and problems of wood based turning handicrafts industry in Bangladesh
2005 - IRG/WP 05-40298
Cottage industry is an important sector both socio-economically and environmentally, because such industries provide jobs and income, which restricts destruction of forest and increase of agri-land. Study on the present status, characteristics, and growth potential of wood based turning handicrafts industry in Bangladesh revealed that in Khulna District, there are 20 (twenty) numbers of turning wo...
A K M A Bosunia, M A Islam, M M Rahman, A K Lahiry
Field test of wood preservatives with Nasutitermes rippertii RAMBUR in Cuba
1996 - IRG/WP 96-10181
A field test of wood preservatives was carried out with Nasutitermes rippertii RAMBUR in the vicinity of the Material Testing Centre „Alexander von Humboldt" in Santiago de las Vegas/ Havana (Cuba) for 12 and 24 months. Test specimens of Pinus sylvestris L., Picea abies (L.) Karst. and Fagus sylvatica L. with dimensions of 25 x 25 x 490 mm³ were arranged vertically or horizontally in a circle o...
W Unger