Your search resulted in 895 documents. Displaying 25 entries per page.
Preservative treatment of round bamboos by a new technique - Some further studies. Part 1
1990 - IRG/WP 3607
In general, the easy susceptibility of bamboos to wood destroying agencies is a major constraint in its rational utilisation. This is more so in tropical countries like India where wood destroying agencies are quite active. In an earlier publication, it was reported that round bamboo specimens of Bambusa balcooa, having three nodes, could be satisfactorily treated by CCA by a new technique develop...
V R Sonti, B Chatterjee
Multiple-Phase Pressure (MPP) Process: One-stage CCA treatment and accelerated fixation process. 3. Effect of process variables on sapwood treatment and CCA fixation.
1998 - IRG/WP 98-40114
The Multiple-Phase Pressure (MPP) Process achieves treatment and fixation as combined process using hot CCA, within a 2-3 hour time-frame. Timber is treated to saturation with hot CCA using an empty cell process. During the pneumatic pressure phase, hot solution is held in the wood in an otherwise liquid-free treatment vessel until fixation is >95% complete.
This report details a factorial des...
H Pearson, K Nasheri, J A Drysdale, G Durbin, M E Hedley
Sawmill Evaluation of a Bioprotectant against Moulds, Stain and Decay on Green Lumber
2003 - IRG/WP 03-10460
Moulds, stain and decay cause serious problems on wood utilization. Though a growing volume of wood is kiln-dried, the market for green exports remains significant, and environment-friendly wood protection is required to replace traditional chemicals. As a solution to this problem, Forintek Canada Corp. developed a bioprotectant for protecting logs and green lumber from moulds, stain and decay, wh...
Dian-Qing Yang, M Gignac, M-C Bisson
Chromated copper arsenate preservative treatment of hardwoods. Part 1: CCA fixation performance of seven North american hardwoods
1997 - IRG/WP 97-30131
There has been an increased interest in utilisation of hardwoods from eastern North America for exterior applications which require protection with preservatives such as CCA. We have examined CCA fixation at two selected temperatures of seven common North American species: red maple (Acer rubrum L.,), white birch (Betula papyrifera ), yellow poplar (Liriodendron tulipifera L.), trembling aspen (Po...
T Stevanovic-Janezic, P A Cooper, Y T Ung
Survey of North American practice in conditioning forest products before preservative treatment
1972 - IRG/WP 308
Seasoning requirements for the wide range of forest products which are treated with preservatives and fire retardants must be capable of dealing with a very complex set of conditions which are summarized under a number of variables including type and hazard of end use, the most effective distribution of preservative, a wide range of cross sectional dimensions, the possibility of seasoning by a ran...
J Rak, T S McKnight
Identification and inhibitory effect of volatiles from different ages of a Trichoderma aureoviride culture on selected wood decay fungi.
1995 - IRG/WP 95-10110
The ability of a Trichoderma sp. to produce volatile organic compounds (VOCs) over a four week period of growth was examined and the inhibitory effect of these volatiles against four selected basidiomycetes over the same period was assessed. After trapping, on tubes filled with chromatography packing material, VOCs were analysed on an integrated automated thermal desorbtion mass spectrometer syste...
A Bruce, A Kundzewicz, R E Wheatley
Comparative study of lignocellulolytic activities of Pleurotus spp. and white rot and brown-rot fungi
1997 - IRG/WP 97-10209
Field and fungal cellar trials have been set up to assess the biocontrol potential of a selected Trichoderma viride isolate in a situation representative of the end use of treated timber in ground contact situations. These trials are designed to give information about the efficacy of biological control as well as the suitability of existing chemical treatment methods for use with biocontrol fungi....
H L Brown, A Bruce
Effects of the delay in the beginning of treatment on absorption and distribution of water-soluble salts in posts treated by sap-replacement method
1992 - IRG/WP 92-3719
One of the most important matters in green wood treatments, such as sap-replacement method, is knowing the longest time available for beginning treatment without losing efficacy. In this paper, the influence of this factor on absorptions and distribution of the preservative into the wood is analized. Tree start-up times were first chosen: 3-6 hours, 48 h and 120 h after being cut down. The treatme...
M V Baonza Merino
A field evaluation of chromated fluoride as a remedial treatment for creosoted wooden distribution poles
1989 - IRG/WP 3556
A commercial chromated fluoride formulation was applied by injection process to previously inoculated creosoted wooden distribution pole sections at a field site in Scotland and appraisal of the efficacy of the formulation against Lentinus lepideus was undertaken at two month and fifteen month intervals. Preliminary results suggest a rapid elimination of organisms from colonised areas. The usage o...
B King, A Bruce
Diffusion treatment of gauged radiata pine timber using "Boracol 20"
1987 - IRG/WP 3437
Green gauged 100 x 50 mm radiata pine timber was preservative treated by brush application of "Boracol 20" followed by diffusion storage. Preservative retention analyses indicated that retention requirements in the core could be achieved within a six week diffusion period, thus representing a time saving of 25% over conventional boron treatment of rough-sawn radiata pine. Similar treatment of kiln...
D R Page, P Vinden, S Retter
Partial seasoning and preservative treatment systems for pine roundwood
1982 - IRG/WP 3187
Experimental trials at FRI, Rotorua showed that the steaming schedule normally used for steaming and venting is also suitable for steaming and vacuum seasoning. Applying vacuum of up to -84 kPa immediately after steaming did not increase the initial loss of wood moisture significantly in comparison to steam/venting. The main improvement to wood condition by using steam/vacuum appeared to be to dis...
A J Bergervoet
Biological control in termite management – the potential of nematodes and fungal pathogens
2004 - IRG/WP 04-10521
A brief overview on the options for biological control of termites is presented. Many organisms have been identified as being able to kill termites, however, we do not know their real impact on field populations of termites. Most research has focused on some entomopathogenic nematodes and the fungi Beauveria bassiana and Metarhizium anisopliae. To date, only a limited number of field studies have ...
M Lenz
Social and economocal impact of an extension of service life resulting of an adequate preventive treatment. Application to wooden components used in urban areas with a high density of population
1993 - IRG/WP 93-50001-15
Le document évalue les problèmes rencontrés en zone urbaine pour le sauvetage des constructions: coordination de la lutte, délimination des chantieres et des périmètres d'investigation, nuisances causées par les interventions, risques pour la santé, risques pour l'environnement. Coûts. Comparaison socio-économique du traitement préventif et des interventions à posteri...
A T De Lelis, G A C Lopez
Boracol 40 - A potential remedial and preservative treatment for lyctids
1983 - IRG/WP 1192
The paper reports on a preliminary assessment of the efficacy of a diffusion formulation, Boracol 40, when applied as a brush treatment: to the surface of Eucalyptus obliqua against the powder-post borer Lyctus brunneus. After a five month bioassay, Boracol 40 has severely retarded the progress of active infestations of Lyctus brunneus and has been 100 per cent effective as a preventative treatmen...
J W Creffield, H Greaves, C D Howick
Treatment and recycle of CCA hazardous waste
1993 - IRG/WP 93-50007
Chromated copper arsenate containing hazardous materials is generated from the manufacture, treatment of the wood, and from the wood itself, after its life cycle. Laboratory treating of these wastes has resulted in materials suitable for recycle or disposal as non-hazardous residues. The extraction, by both acidic and ammoniacal routes, of CCA production and treating plant waste materials has been...
E A Pasek, C R McIntyre
Survey of practical methods for conditioning of forest products before preservative treatment
1971 - IRG/WP 39
The seasoning of forest products is undertaken for a wide range of end uses and is becoming increasingly required for applications and building construction and secondary manufacturing industries. A wide range of applications of new technology and specifically required seasoning schedules is being actively developed for such requirements, but less attention has been given to the means by which woo...
J Rak, T S McKnight
New research data confirming the suitability of bifenthrin as a wood preservative
1996 - IRG/WP 96-30116
Bifenthrin has been further tested against wood destroying insects, and its behaviour in wood has been extensively studied. Bifenthrin proved to be highly effective as a curative and preventative treatment against Anobium punctatum and Hylotrupes bajulus, after both leaching and evaporative ageing. Results of penetration tests with water and solvent based formulations, applied by brushing, dipping...
S Shires, P Héloir, B Chen, G Rustenburg
Development of a novel treatment process and its applications
1998 - IRG/WP 98-40111
An efficient treatment process called "Isostatic Compression Recovery (ICR) Process" for impregnating liquids into wood has been developed. The process comprises steps of isostatic compression of wood in the liquid at temperatures above its softening temperature and subsequent recovery of its original volume under liquid pressure. A large amount of surrounding liquid is absorbed into the wood in t...
T Arakawa, M Funato, A Hoshino, T Muraki
Hot and cold treatment in fence posts of Eucalyptus globulus, Castanea sativa, Pinus nigra and Pinus pinaster
1988 - IRG/WP 3489
An analysis is made of the treatment of fence-posts of Eucalyptus globulus, Castanea sativa, Pinus nigra and Pinus pinaster by hot and cold immersion in creosote. The temperatures of the different treatments were 60, 70 and 90°C. The posts were heated for one hour and then allowed to cool for 21 hours 30 min., and finally reheated for 1 hour 30 min. The greatest absorption rates were recorded in ...
C De Arana Moncada, A M Navarrete
Accelerating effects of the field biological attacks in a weather controled soil bed room
1997 - IRG/WP 97-20118
For the purpose of the accelerating the field evaluation of the material service life, a weather controlled soil bed room were designed. The room was controlled 30°C, 75%R.H. In this room, water was sprayed 15 minutes a day. The workers and soldiers of termite, Reticulitermes speratus, can be penetrated. The comparison results of preservative brushing coated treated stakes between field ones and ...
K Suzuki, I Momohara, T Nishimura
Borate Protection and Termites: Variation in Protection Thresholds Explained
2006 - IRG/WP 06-20324
Laboratory and field data reported in the literature are confusing with regard to ‘adequate’ protection thresholds for borate timber preservatives against subterranean termites. The confusion is compounded by differences in termite species, timber species and test methodology. Laboratory data indicate a borate retention of 0.5% mass/mass (m/m) boric acid equivalent (BAE) would cause > 90% t...
B C Peters, C J Fitzgerald
Biological variability in the oxalate/oxalate decarboxylase system among five isolates of the wood-degrading fungus Meruliporia incrassate
2006 - IRG/WP 06-10573
The “dry-rot” wood decay fungus Meruliporia incrassata has recently attracted attention, primarily in the western coastal United States, as a particularly destructive pest of building material. Recently, the US Environmental Protection Agency (EPA) has accepted a voluntary withdrawal of the historically effective chromated-copper arsenate (CCA) as a preservative for wood used in residential se...
C Howell, J Jellison
Blue Staining of Coated Modified and Unmodified Wood
2006 - IRG/WP 06-10589
We investigated resistance of unmodified, DMDHEU modified and oil heat treated uncoated and coated Scots pine wood against blue stain fungi. Both EN 152-1 and the reverse exposure tests showed excellent resistance of DMDHEU and especially of oil heat treated wood against blue staining. It is not needed to add any additional protective coating layers to prevent modified wood from staining. However,...
M Petric, M Pavlic, M Humar, M Tomažic
Resistance of pine and spruce heartwood against decay - The effect of wood chemical composition and coating with water-borne wood oil product
2006 - IRG/WP 06-10597
Natural durability of wood has been widely studied, but the combination of the natural durability and different treatments has not been the focus of many studies. The durability of wooden products is mainly based on the water permeability and the resistance against organisms. In this study, the water absorption and decay resistance of sapwood and heartwood of Scots pine and Norway spruce were exam...
H Viitanen, S Metsä-Kortelainen, T Laakso
Study of new wood preservatives from biological origin and low toxicity against wood decay organisms (fungi and termites)
2006 - IRG/WP 06-10600
Wood as an organic material is likely to be attacked by living organisms if no protecting treatment is applied to improve its durability. The biological agents, which in Spain, due to its specific climatologic, cause major damage to wood, are the stain fungi, the rot fungi and the subterranean termites.
The commercialisation of the products actually used to treat wood against fungi and to treat t...
M T Troya, M J Prieto, F Rubio, D Lorenzo, J J Teixidó