Your search resulted in 3405 documents. Displaying 25 entries per page.
The treatability of five Indonesian wood species with BFCA preservative
1987 - IRG/WP 3428
This paper deals with a preliminary study on the treatability of five Indonesian wood species, i.e. Altingia excelsa (AE), Rhodoleria teysmanii (CA), Litsea odorivera (LO), Schima wallichii (SW) and Cratoxylon arborescens (CA). Wood samples measuring 4 x 4 x 100 cm³ were dipped into BFCA preservative solution for about 30 seconds. Preservative penetration and the surface area of treated zone were...
Nana Supriana, T K Waluyo
The economics of saving standing wood poles. Labour saving system for pole groundline retreatment
1980 - IRG/WP 3160
This paper consists of 3 contributions
First:
There are still people who consider wood poles a disposable commodity much the same as paper cups and toilet paper. The idea of conservation is still new in this field, but soon conservation will be a necessity. Only two percent of the forest recources of North America are being replaced. What does it mean? We will run out of poles a lot sooner than ...
W V Inkis
IPBC - A new fungicide for wood protection
1984 - IRG/WP 3295
3-iodo-2-propynyl butyl carbamate (IPBC) is presented as a potential low toxic alternative to pentachlorophenol and the sodium chlorophenoxides. Data on its effect against basidiomycetes is shown. Tests according to both the European standard method, EN-113, and American, ASTM D-413, have shown its potential. The chemical gives protection against both the wood destroying fungi, blue stain, mould and algae. It is possible to have it formulated in both water-based and organic solvent-based products. Treatment of wood out of ground contact (vac-vac products, pretreatment products, primers, stains, etc.) and sapstain control are some of the most potential end use areas within wood protection. Besides wood protection, the IPBC is used as a fungicide in paint, adhesives, caulks and sealants, cement, leather, paper, cutting oil, ink and in different roofing materials.
J Hansen
Trust in the durability of preserved wood during and after the reclamation of the Zuiderzee
1987 - IRG/WP 4134
A firm belief in the durability of preserved wood must have existed during the reclamation of the Zuiderzee, because thousands of m³ have been utilized. The wood is exposed to attacks of marine borers and other organisms in the marine environment. Was this trust right or wrong? A recent examination was made of creosote impregnated pine posts after 65 years service in a dam, near the Barrier Dam a...
H Visscher
Potential for using dip/supercritical fluid treatments for wood impregnation
2004 - IRG/WP 04-40276
While supercritical fluid impregnation offers tremendous potential for impregnating wood species that resist conventional liquid preservative treatments, the resulting treatments are often not uniform among samples in a charge or between charges. One factor that influences treatment is the dynamic change in pressure that occurs during introduction of the biocide laden supercritical fluid into the ...
Sung-Mo Kang, J J Morrell
Deterioration of wood viewed from iron nail
1991 - IRG/WP 2368
Deterioration of nail was graded by a five - rank numerical - rating. The rating of nail moisture content and decay of wood were inspected in a mortal-wall of 34-year-old house. The wood was mostly in decay, when the rating of the nail was above about 4, and the moisture content was above about 20%. Nailed wood specimens kept in several humidity room of 20°C for 4 years showed that the rating of ...
H Imamura
Dimensional stability and decay resistance of wood upon modification with some new type chemical reactants
1994 - IRG/WP 94-40028
Solid wood of home grown species can be upgraded by chemical modification with environmentally acceptable chemicals. The best kwown example of modification reaction is acetylation with acetic anhydride. A continued search for reactive chemicals other than acetic anhydride is ongoing, aiming at the improvement of technical properties of wood. This contribution deals with the results of a screening ...
P Goethals, M Stevens
Six-year Report on the Performance of Borate-treated Lumber in an Above-ground Termite Field Test in Hawaii
2004 - IRG/WP 04-30343
We report the fifth and sixth years of field study results from a protected above-ground field test in Hawaii simulating the sill plate (dodai) used in conventional Japanese housing construction. Field tests were established in both Hawaii and Japan to examine the efficacy of disodium octaborate tetrahydrate (DOT, 2% and 3% BAE shell and through) wood treatments. In Hawaii, chromated copper arsen...
J K Grace, A Byrne, P I Morris, K Tsunoda
Leaching of arsenic, copper and chrome from preservative-treated timber in playground equipment
1984 - IRG/WP 3149
Samples were taken from CCA-treated timber in sand play boxes and other play ground equipment. Sand was also sampled. Sand and wood samples were analysed for copper, chrome and arsenic by AAS. About 20-25% of the arsenic had leached from the timber after 2-4 year's exposure in the playgrounds. Very little of the copper and chrome had been leached. Sand collected in the close vicinity of t...
B Henningsson, B Carlsson
Evaluation of tropical wood by-products as a potential source for termite control products
2001 - IRG/WP 01-10408
Termites damaging in houses represent an ever growing threat in Europe, where the phenomenon has accelerated during the last ten years, as well as in the tropics, where infestations are permanent. To fight against this plague, the current methods used, through injection of organochloric or organophosphorized products into the timber structures and walls, are belonging to the past due to the toxici...
A Zaremski, S Robert, J-L Clement, D Fouquet
Soft-rot in Tabebuia sp. wood used in water cooling tower:
identification and degradation capacity of the fungi
1998 - IRG/WP 98-10253
Tabebuia sp. (ipe), a native Brazilian wood, is considered of high natural resistance to decaying fungi, and has been used in harsh environments, as cooling towers. Fifty-one fungi, belonging to mitosporic fungi group (Fungi Imperfecti), were isolated from deteriorated Tabebuia sp. wood samples, collected from the mist eliminator and packing of a cooling tower in operation for about 23 years. The ...
S Brazolin, M Tomazello, I H Schoenlein-Crusius
Remedial wood preservative efficacy of BORA-CARE against the Formosan subterranean termite and eastern subterranean termite (Isoptera: Rhinotermitidae)
1991 - IRG/WP 1504
When a spruce board (3.8 cm x 8.8 cm x 2.4 m) was surface-sprayed with BORA-CARETM solution (containing 23% disodium octaborate tetrahydrate) and stored in an air-conditioned room (24 ± 2°C and 60 ± 5% RH) for eight months, ca. 40% of the wood (measured by the cross section surface proportion) contained borates at the rate of >2,500 ppm BAE (boric acid equivalent). In a choice bioassay, term...
N-Y Su, R H Scheffrahn
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
Marine wood-borer test with preservatives on the coasts of Turkey
1995 - IRG/WP 95-10091
Marine wood-borer tests were carried out on the coasts of Turkey (Marmara, Mediterranean Sea and Black Sea). Sapwood blocks of 8 x 15 x 30 cm³ in size from Scots pine, Bornmüller's fir oriental beech and sessile oak were used. The test blocks were treated with CCB-salts by full cell process and coal tar creosote by empty cell process. The test blocks were installed on exposure sites bef...
A Bobat
The effect of of sorbitol on the decay of boric acid treated Scots pine
1991 - IRG/WP 1509
The tetra-hydroxy borate ion is known to undergo complexation with polyols of biological importance and probably protects treated timber by this action. The inhibitory effect of boric acid upon fungal growth and dehydrogenases has been shown to be prevented by the addition of certain polyols. This work was extended, with a study of the effects of a polyol on the performance of boric acid in treate...
J D Lloyd, D J Dickinson, R J Murphy
Soft rot fungi found in copper/chrome/arsenic treated hardwood power transmission poles in Queensland
1978 - IRG/WP 185
In Queensland the effective service life of copper/chrome/arsenic (CCA) treated hardwood telegraph and power transmission poles is being dramatically shortened due to attack by soft rot decay fungi. The Australian Wood Preservation and Pole Industries are funding research into this serious soft rot problem involving C.S.I.R.O. and the University of Queensland. The C.S.I.R.O. is actively engaged wi...
L E Leightley
Assessing the bioresistance conferred to solid wood by chemical modification
1997 - IRG/WP 97-40099
The chemical modification of wood using straight chain alkyl anhydrides can considerably enhance its durability. This paper presents an assessment of the effectiveness of these modifiers in improving the biological resistance of a susceptible softwood when exposed to four different basidiomycete fungi, soft rots and the larvae of the house longhorn beetle (Hylotrupes bajulus). It was clear that so...
E D Suttie, C A S Hill, D Jones, R J Orsler
Soft rot decay in CCA treated eucalypts in Queensland - A comment
1986 - IRG/WP 1301
A survey has been completed concerned with the distribution and severity of groundline soft rot decay in the CCA treated sapwood of eucalypt poles in Queensland. The survey encountered some 1000 poles of which 55% were slightly, 28% moderately and 17% severely decayed. Soft rot decay was more severe in urban than rural locations. Embedment of poles in concrete resulted in severe soft rot. No signi...
L E Leightley
Decay resistance of Siberian larch wood against brown rot fungus. - Part 3. The variation between plus trees and their grafted clones
2000 - IRG/WP 00-10350
The aim of the study was to estimate the variation in the decay resistance of Siberian larch (Larix sibirica Ledeb.) wood using mature plus trees and their grafted clones. Samples were collected with an increment core borer from 11 original plus trees and their 25-year-old grafted seed orchard clones. A typical brown rot fungus, Coniophora puteana (Schum. ex Fr.) Karst. (BAM Ebw. 15), was used as ...
H Viitanen, L Paajanen, M Venäläinen, A Harju, P Velling
Inhibitory effects of leachates from Scots pine wood on germination of some wood rotting fungi
1986 - IRG/WP 1282
Leachates from sapwood of Pinus sylvestris inhibited or reduced the germination of basidiospores of the wood decay fungi tested. The fungi were selected among those preferentially colonizing hardwood or softwood, representatives for brown rot and white rot fungi, early basidiomycete colonizers and late basidiomycete colonizers in above-ground parts of pine as well as fungi found in high frequencie...
J Bjurman
New principles for the protection of wood: Impregnation with waterborne resins
1995 - IRG/WP 95-40047
The environmental impact of classical wood preservatives as well as the use of tropical wood species with high natural durability is regarded increasingly critically in the public. Therefore other partially new principles for the protection of wood, like chemical modification, or treatment with resins were examined especially in USA, Japan and in Europe with promising results predominantly in the ...
A O Rapp, R-D Peek
The effect of a chelator mediated fenton system on activation of TMP fibres and decolorization of synthesized dyes
2004 - IRG/WP 04-50223
The purpose of this work is to improve our current knowledge of the non-enzymatic mechanisms involved in the brown rot degradation of wood, but also to study the potential applications of a chelator-mediated Fenton system in activation of wood fibers and decolorization of synthesized dyes. In this work, Electron Spin Resonance (ESR) spin-trapping techniques were used to study the generation of hyd...
Yuhui Qian, B Goodell, J Jellison
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
Mercury porosimetric evaluation of the impregnability of wood
1985 - IRG/WP 2234
Mercury porosimetric measurements for specimens of a given length can not be used to evaluate the treatability of wood. The reason is that the permeability for low permeable woods deviates from Darcy's law with the specimen length. This paper presents a method of evaluation which respects this phenomenon in indicating not only pore size but also a factor describing the pore size as a func...
J P Hösli