Your search resulted in 803 documents. Displaying 25 entries per page.
Recent development in North American industrial wood preservation plants
1988 - IRG/WP 3467
After remaining static for many years there have been a number of changes in plant design and treating cycles in recent years. This has been particularly true in the USA where few restrictions are placed on plant treating cycles by specifications; since only results type specifications are used. It is also important to realize that the AWPA Specifications for Southern Yellow Pine only call for tre...
J F Bridges
The evaluation of the effectiveness of wood preservatives by means of IUFRO's method for field tests with wooden stakes
1985 - IRG/WP 3348
Pinus elliottii and Eucalyptus saligna stakes treated with CCA-A, CCA-C, CCB, Cashew Nut Shell Oil and Benzotar solutions were exposed in seven test sites in Sao Paulo State, Brazil. After five years of exposure, between oil-borne preservatives Benzotar show better performance than CNSL (cashew nut shell liquid), and within waterborne preservatives the performance of CCB is not so good as that of ...
G A C Lopez, A M F Oliveira, E S Lepage
Current status of AAC preservatives in New Zealand
1980 - IRG/WP 3141
Two types of alkylammonium compounds (AAC) have been approved as commercially acceptable wood preservatives by the NZ Timber Preservation Authority (TPA). They are alkyldimethylbenzyl ammonium chloride and alkyldimethylamine acetate, both of which must contain either (a) 70% alkyl chains of C12 + C14 and less than 10% of any other individual chain length, or (b) 85% alkyl chains of C12 + C14 with ...
J A Butcher
An observation of seasoning, preservative treatment and storing of CCA treated 30 bangladeshi hardwood species for crossarms
1995 - IRG/WP 95-40058
Observed kiln seasoning, preservative pressure treatment and storing of CCA treated 30 Bangladeshi hardwood species for crossarms. It revealed that it was very difficult to kiln season and preservative pressure treatment of thirty species together in a single charge and found that when species of different specific gravity kiln season together there occur some objectionable seasoning degrades, and...
G N M Ilias, M D Rokib-ul-Hafiz
Time limits for holding logs to achieve successful antisapstain treatment
1997 - IRG/WP 97-30126
The purpose of these trials was to determine the maximum time that logs can be left in winter and summer before treatment if sapstain, caused by pre-treatment infection, was to be prevented. Pre-treatment storage conditions representative of average temperature and humidity for the winter months of June, July and August, and of moderately severe summer conditions, for the Bay of Plenty, New Zealan...
D R Eden, R N Wakeling, C M Chittenden, J G Van der Waals, B Carpenter
Laboratory Evaluation of the Formosan Subterranean Termite Resistance of Borate-treated Rubberwood Chipboard
2004 - IRG/WP 04-30359
Both no-choice and two-choice 4-week AWPA laboratory tests were performed to evaluate the resistance of borate-treated rubberwood (Hevea brasiliensis) chipboard prepared from a commercial mill run, against the Formosan subterranean termite Coptotermes formosanus. Boric acid (technical granular) was incorporated into the boards during manufacture to achieve loadings of 1.0% or 1.1% boric acid equiv...
A H H Wong, J K Grace
A comparison between high and conventional incision densities for improving preservative treatment of Douglas-fir heartwood lumber
1993 - IRG/WP 93-40009
Incising is required for the preservative treatment of most wood species from the western United States; however, there is considerable debate about the density of incisions required to achieve adequate treatment. Previous studies have shown that the incision effect on treatment is relatively narrow, suggesting that incision densities should be significantly increased over current practices and st...
S T Lebow, J J Morrell
Accelerated diffusion treatment of sawn Sitka spruce grown in the UK
1986 - IRG/WP 3395
The treatment of 'green' sapwood and heartwood of Sitka spruce by diffusion methods was investigated. Steam/dip treatment processes gave increased solution uptakes and depths of penetration of copper in comparison with a simple dip treatment. Further investigation is required to reduce diffusion gradients with copper based formulations and to improve the penetration of '...
R J Murphy, D J Dickinson
Applicability of supercritical carbon dioxide to the preservative treatment of wood-based composites
2001 - IRG/WP 01-40199
Treatability of five structural-use wood-based composites (medium density fiberboard, hardwood plywood, softwood plywood, particleboard and oriented strand board) was evaluated when supercritical (SC) carbon dioxide (CO2) was used as a carrier solvent. Treatments were conducted at three temperature 32 levels (25, 35 and 45°C) and two pressure levels [80 kgf/cm2 (7,845 kPa) and 120 kgf/cm2 (11,768...
M Muin, A Adachi, K Tsunoda
Clean creosote - its development, and comparison with conventional high temperature creosote
1983 - IRG/WP 3235
Pigment emulsified creosote (PEC) is presently being tested and shows considerable stability in terms of water content, pigment level, pH, viscosity, rheological behaviour and microscopy. Timber samples from several eucalypt species have been treated with PEC and side matched samples treated with conventional high temperature creosote (HTC). The PEC treated specimens showed higher weight retention...
C W Chin, J B Watkins, H Greaves
Sawn timber of fir (Abies alba Mill.) - Treatability and usability for the Hazard Classes 3 and 4
1999 - IRG/WP 99-40147
Within a national research project, tests on the treatability on sawn timber of fir (Abies alba Mill.) in oscillation pressure, vacuum pressure and double-vacuum processes have been worked out with 95 trunks taken from 3 different altitude levels (up to a height of 590 metres, 600 to 990 metres and over 1000 metres) and from 4 different regions of Switzerland. As the treatability of round wood can...
E Graf, T Bör
New applications of silafluofen to termite control
2001 - IRG/WP 01-30274
Silafluofen-based termiticides are widely used for soil and timber treatments in Japan, as silafluofen possesses advantageous properties of low fish toxicity and high chemical stability (to light, in soil, in alkaline environments, etc) in addition to high termiticidal activity and low mammalian toxicity. As new applications of silafluofen to termite control, we have developed another type of prod...
K Nakayama, Y Minamite, S Koike, Y Katsuda, K Nishimoto
Development of a disinfection treatment for oak logs to be imported from the USA
1984 - IRG/WP 3283
The European veneer industry depends greatly on oak supplies from the USA. To prevent the accidental introduction of the American Oak Wilt Disease (Ceratocystis fagacearum) into the member states of the EC, a disinfection treatment was developed for oak logs under consideration of the technical requirements of veneer production. Laboratory experiments and field trials in Germany and in the USA sho...
W Liese, M M Ruetze
Improved preservative penetration of spruce after pre-treatment with selected fungi. II. Creosote treatment, analysis and strength testing
1998 - IRG/WP 98-40106
This paper describes the creosote treatment and analysis of logs pre-treated with selected fungal agents as a method of increasing the porosity of the wood prior to preservative treatment. The paper also reports the subsequent strength testing of the timber to evaluate the effects of the fungal pre-treatment on the structural integrity of the wood.
European spruce logs were pre-treated with eithe...
E J Tucker, A Bruce, H J Staines, B Rosner, K Messner
Effect of point of preservative addition on the mechanical and physical properties of strandboard treated with Tanalith 3485
2000 - IRG/WP 00-40152
Preservative has been added to a PF bonded strandboard at various different stages in the manufacturing cycle and the physical and mechanical properties of the boards have been evaluated (modulus of elasticity, modulus of rupture, thickness swelling, water absorption, internal bond strength, and shear strength). Preservative addition has been examined at five different stages namely green strand d...
G J Goroyias, M D C Hale
Evaluation of copperised Cashew nut shell liquid and Neem oil as wood preservatives
2005 - IRG/WP 05-30368
An effort has been made to develop eco-friendly wood preservatives using naturally available plant by-products with less toxicity. Copper was incorporated into Cashew nut shell liquid (CNSL) and Neem seed oil. Rubber wood samples were treated with these solutions employing dipping and pressure techniques in 3 different levels. These samples have been evaluated to find out the effectiveness as wood...
D Venmalar, H C Nagaveni
Improved preservative penetration of spruce after pre-treatment with selected fungi. I. Fungal pre-treatment of pole sections
1998 - IRG/WP 98-40117
European spruce logs were pre-treated with either Phanaerochete chrysosporium, Dichomitus squalens, Trichoderma viride and Trichoderma aureoviride for incubation periods of between 1-4 weeks prior to pressure treatment with creosote in a commercial treatment plant and analysed for strength and creosote uptake (see part II Tucker et al.). A method to pre-treat logs was optimised. The pole sections ...
B Rosner, K Messner, E J B Tucker, A Bruce
Remedial treatment of creosoted railway sleepers of redwood by selective application of boric acid
1980 - IRG/WP 3134
An ideal preservative for remedial treatment must primarily be characterized by two requirements. First, it must have an ability to diffuse and distribut evenly into the wood and secondly, it must be fixed properly so that it does not leach out too fast. However, these two characteristics conflict with each other, and the choice of preservative must of necessity be a compromise. Wood preservatives...
C Bechgaard, L Borup, B Henningsson, J Jermer
Preservative treatment of rubber wood (Hevea brasiliensis) to increase its service life
2005 - IRG/WP 05-40320
Rubber wood (Hevea brasiliensis) possess excellent properties for interior designing, wood working and furniture making. But it is very much susceptible to sap stain and mould fungi which decreases the service life. For profitable uses , it is necessary to increase the service life of rubber wood. To protect the rubber wood from wood degrading agents, the sawn timber were treated with Borax – b...
K Akhter
Revised South African standards for wood preservation: Protocols for approval of wood preservatives
1995 - IRG/WP 95-20072
In 1994 the South African timber treatment industry completed its revision of the South African Bureau of Standards (SABS) Code of Practice for the preservative treatment of timber. These revisions were undertaken in parallel with changes to the SABS specifications for preservative treated timber. As a result of shortcomings in the previous wood preservative classification system which was based o...
D Conradie, P Turner, W E Conradie, A D Currie, I S J Burger
Proposal for a simple methodology for the evaluation of the preventive effectiveness of protectors applied in superficial treatments against basidiomycetes fungi
1999 - IRG/WP 99-20167
Due to the considerable effect that the relation between the lateral surface and the volume of wood blocks has on superficial treatments, this work has attempted to determine the ideal size which allows to evaluate the effectiveness of a preservative in the shortest possible time. Three wood blocks of different dimensions were tested. In addition, as it is necessary to neutralise the effect of the...
M T De Troya, A Navarrete, F Rubio, M Yuste, C Rodríguez-Borrajo, D Muñoz-Mingarro, F Llinares
Utilization of coconut timber from north Sulawesi, Indonesia. Part 2: Treatability
1994 - IRG/WP 94-40025
Under tropical conditions coconut wood is quickly degraded by mold and blue stain fungi. Low density wood in ground contact is commonly decomposed by wood destroying fungi within a period of only a few months, higher density wood from the outer stem regions within 24 to 30 months (MOSTEIRO, CASIN, SERIBAN 1976; McQUIRE 1975). Moreover, according to McQUIRE (1975) green wood of lower density is hig...
R-D Peek
Collaborative soft rot tests: Statistical treatment of results of soil analyses
1971 - IRG/WP 29
Institutes taking part in the collaborative experiments already reported forwarded samples of the soils employed in the tests to the Forest Products Research Laboratory, England. The soils were then autoclaved sterilised under uniform conditions and sent to the Department of Forest Soils, the Royal College of Forestry, Stockholm, Sweden. The results of the soil analyses are given in Table 1, toget...
A F Bravery
A report on the development of "Technical Recommendations Document for the Canadian wood preservation and protection facilities"
1987 - IRG/WP 3447
The wood preservation and wood protection industry uses chemicals which are similar. However, because the methods of applications of preservatives are different in wood preservation (pressure treatment) and wood protection (surface treatment) plants, their problems need to be resolved separately. As a part of a federal strategy to protect the environment and human health from potentially toxic com...
G Das, V N P Mathur
Screening of modified linseed oils on their applicability in wood protection
2004 - IRG/WP 04-30346
In this study modified linseed oils, rape oil and three waxes were screened on their efficacy as wood protecting agents. By testing all products when impregnated with high retentions in Scots Pine sapwood on water repellence qualities, additionally an accelerated weathering test, drying quality, accelerated brown rot and blue stain test, an indication is formed of the capability of these products ...
A Treu, J Lückers, H Militz