Your search resulted in 111 documents. Displaying 25 entries per page.
Performance of preservative-treated wood not in ground contact
1975 - IRG/WP 254
Experimental sash units of Pinus strobus L. and Pinus resinosa Ait. wood were removed from a test fence at Ottawa, Canada after outdoor exposure of over 20 years. The units were superficially treated, prior to painting, with preservatives containing either copper naphthenate, pentachlorophenol or a combination of zinc naphthenate and pentachlorophenol. Results indicated that all treatments were ef...
J K Shields, J Krzyzewski
A bioassay for appraising preservative protection of wood above ground
1978 - IRG/WP 2124
A bioassay, using the mold fungus Aspergillus niger, gave results that were correlated with amounts of pentachlorophenol and tributyltin oxide in pine sapwood treated with solutions ranging in strength from 0.016 or below to 5%. Limited bioassay estimates of penta in commercially treated millwork corresponded to estimates by lime ignition. The assay fungus exhibited somewhat greater tolerance of t...
T C Scheffer, L Gollob
Pentachlorophenol and tributyltin oxide - the performance of treated Pinus radiata after 12 years' exposure
1986 - IRG/WP 3361
Pinus radiata samples were impregnated with a range of light organic solvent preservatives and copper/chrome/arsenic salt and exposed with no surface coating both in and above ground for 12 years. Inspection of the test samples revealed that some formulations of light organic solvent preservatives will give good fungal protection and reduce splitting in Pinus radiata exposed externally without a s...
R S Johnstone
A bioassay to determine preservative retention in hardwoods and southern pines
1982 - IRG/WP 2183
In this paper the author discusses and suggests a new method of evaluating preservative retention in treated woods by means of bioassays. Twelve North American species were tested with different retention levels of pentachlorophenol (PCP) and copper/chrome/arsenic (CCA) preservatives. The results observed in this work show that among other fungi, Aspergillus niger responds to both preservatives, w...
J C Moreschi
Adequate preservative treatment of kiln dried Eucalyptus camaldulensis and Acacia mangium for tropical and subtropical wood poles
1996 - IRG/WP 96-40075
The Eucalyptus camaldulensis and Acacia mangium round timbers kiln-dried at EMC and full cell pressure treated with CCA-C ensured requisite penetration and adequate dry retention (30 kg/m³ or 4% w/w). The sufficient inherent strength, seasoning property, treatability of sapwood and heartwood equivalent to 44% of radius, natural durability of heartwood, and field investigation on service performan...
A K Lahiry
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
Étude de l'impact d'un xénobiotique sur le milieu aquatique: Approche méthodologique
1990 - IRG/WP 3586
L'action de xénobiotiques sur les communautés vivantes des écosystèmes lénitiques a été abordée à des échelles spatiotemporelles différentes. Dépassant le niveau des tests monospécifiques, nous avons effectué des essais en laboratoire sur des microcosmes contenant des végétaux ( Lemna minor ) et des bactéries et également sur des bassins de quelque m³ contenant une gran...
G Blake, G Merlin
Dura-Treet II, a water dispersible pentachlorophenol
1980 - IRG/WP 3165
During the past several decades, penta petroleum wood treating has become increasingly popular. Penta is an effective chemical compound against wood organisms causing decay and rot, is safe to handle, also clean and easy to use. In terms of preservative cost, it has been and remains by far the least expensive of the three major preservatives. However, when the cost of petroleum carrier is added, t...
D B Hatcher
Preliminary testing of an improvised wood preservative mixture applied against dry wood beetles
1986 - IRG/WP 1308
An improvised wood preservative mixture was preliminarily tested in situ against some dry wood beetles which had infested structural timbers in a semi-finished building. The results obtained should encourage further research towards mobilizing/improvising locally available resources in the face of scarce standard wood preservatives, against the background of a dilemma in wood utilization in the de...
M O Akanbi, E M Bayode, A A Alabi, J Gbadebo
The potential for reuse of treated wood poles removed from service
1993 - IRG/WP 93-50001-18
Poles removed from service in Ontario and Quebec, Canada were characterized by age, wood species, preservative type, residual preservative, dimensions and condition. Based on this charactarization, the potential for reuse as round poles or posts, sawn posts, timbers and lumber, cedar roof shingles and firewood was assessed. A pilot study was conducted to evaluate the recovery and grade of lumber p...
P A Cooper
Co-operative tests concerning influence of solvent and drying method on the toxic limit of wood preservatives against Basidiomycetes. Preliminary report
1971 - IRG/WP 204
In the Working Group II of the Organization for Economic Co-operation and Development working group on wood preservation (now International Research Group on wood preservation) it was agreed that more knowledge was necessary concerning the influence of the solvent on the toxic limit of organic solvent types of wood preservatives against Basidiomycetes. A test program was drawn up and after discuss...
T Hof
In ground performance of wood treated with a substituted isothiazolone
1990 - IRG/WP 3612
Isothiazolones (I.T.A.'s) are a class of biocides that have potential for use as wood preservatives. The substituted ITA, RH-287, (4,5,dichloro-2-n-octyl-isothiazolone-3-one) is being evaluated as a broad spectrum wood preservative. The evaluation program includes in ground stake tests which were established at two test sites in Mississippi, USA The tests used southern yellow pine treated...
L E Leightley, D D Nicholas
The detection of organic solvent preservatives in wood by thin-layer chromatography
1975 - IRG/WP 357
A simple and rapid method for the detection of common organic solvent wood preservative materials is described. The method uses thin-layer chromatography after leaching of the preservative from sections of timber with chloroform. RF values and the sensitivity of the method are discussed and a routine procedure for identification of the organic and organometallic preservatives is proposed. Methods ...
B G Henshaw, J W W Morgan, N Williams
A report of the Technical Recommendations documents for the Canadian Wood Protection and Preservation Facilities and an environmental study of storm water runoff from anti-sapstain treatment plants
1988 - IRG/WP 3478
With the completion of the Final draft of the Technical Recommendations (TR) documents for the Wood Preservation and Wood Protection Industry, there are naturally questions on what is expected from these documents and how Environment Canada and Provincial regulatory agencies may interact with the wood preservation industry. In general, it is expected that the Canadian Wood Preservation and Protect...
G Das, V N P Mathur
Immunoassays for detecting and tracking wood-protecting chemicals
1998 - IRG/WP 98-50101-10
To respond to new environmental regulations, forest products industries are reducing or eliminating the release into the environment of chemicals used to protect wood products. For this, mills need tools that support practical and reliable programs for monitoring concentrations of wood protectants in processes and the environment. Conventionally, wood preservatives are detected mainly by gas-liqui...
C Breuil, J Bull
Evaluation of the protective means of some wood preservatives by means of accelerated tests
1973 - IRG/WP 232
In site conditions of the eastern site in the forest-steppe part of the Krasnovarsk region, the relative effectiveness of a series of wood preservatives was obtained by means of field tests. To obtain a more accurate evaluation of the protective qualities of these accelerated tests were carried out in laboratory conditions. In 9 boxes filled with non-sterile soil taken from the site, 72 samples of...
I A Petrenko
The relationship between preservative type and surface degrade in Pinus radiata
1980 - IRG/WP 3158
Samples of Pinus radiata D. Don were impregnated with one of two preservative types, a copper chrome arsenic salt and a light organic solvent preservative. The panels were exposed to the weather for 4-5 years at a site near Sydney, Australia. Macroscopic and microscopic examinations showed different rates and patterns of weathering between the samples treated with each preservative and an untreate...
R S Johnstone, R K Bamber
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
Blue stain in timber in service. Preliminary results of the IRG collaborative tests to compare natural and artificial weathering
1978 - IRG/WP 286
The collaborative programme was initiated at IRG Meetings in Wildhaus, 1976. The six collaborators were BAM (Berlin), Cuprinol Ltd (UK), EMPA (Switzerland), GORI (Denmark), PRL (UK) and Imperial College (UK). Experimental plans were finalised in December 1976 and panels treated by Cuprinol Ltd early in 1977. Natural weathering was carried out by BAM, Cuprinol, EMPA, GORI and PRL during April-Septe...
A F Bravery, D J Dickinson
Glue-line additives for protecting plywood. A review
1978 - IRG/WP 2102
The conclusions of this review are: 1) Insecticidal glue-line additives can be used satisfactorily to protect plywood against insect attack. 2) It is uncertain, in spite of some claims, wether fungicidal glue-line additives can be similarly used to protect plywood against fungi under damp conditiones. There is a need for further work to validate the mycological tests that may be used to investigat...
R Cockcroft
PCP in aquatic environments arising from historic contamination at wood processing and preservation sites
1995 - IRG/WP 95-50040-14
Three different studies are reported that assess the impacts of Pentachlorophenol (PCP) in aquatic environments arising from its historic use at sawmilling and wood preservation sites. These studies involved New Zealand wood processing facilities, and collectively they aimed to measure the transport of PCP from sawmill sites into the aquatic environment, determine the background environmental conc...
J S Gifford, P N McFarlane, M C Judd, S M Anderson
A bioassay of remedially treated pole material
1987 - IRG/WP 3453
Stubs prepared from treated and untreated utility poles were installed in a test plot and pressure spade treated at the groundline with one of four preservative greases. At one and three year intervals, core samples were removed from the stubs and the improvement in the preservative efficacy due to the greases was assessed. The bioassay investigation showed that only bis(tributyltin) oxide (TBTO) ...
J N R Ruddick, L Parker
The effect of kerfing on check formation in treated white spruce (Picea glauca) poles
1981 - IRG/WP 3167
62 white spruce poles, 6 m in length, were cut from full size utility poles commercially pressure treated with preservative. 21 of the poles were treated with pentachlorophenol, while of the remainder, all of which were treated with ammoniacal copper arsenate, 22 were kerfed and 19 were unkerfed. The poles were installed in the Westham Island field test site, near Vancouver, and inspected annually...
J N R Ruddick
Pentachlorophenol - The US and Canadian experience
1995 - IRG/WP 95-50040-26
Pentachlorophenol ("Penta") is a highly effective and economical wood preservative. The principal use in the United-States and Canada is pressure-treatment of wood; major applications are for railroad ties, pilings, posts, cross arms, and poles. Treatment of wood products with pentachlorophenol typically extends the functional life of wood by at least eight times. Because of the presence of certai...
J Wilkinson