Your search resulted in 678 documents. Displaying 25 entries per page.
Comparative studies on the species effects of wood preservatives
1989 - IRG/WP 3521
For the examination of the resistance against fungal attack, wood blocks of 3 softwood species were treated with CCA (type 3), CFK, AAC and IF-1000 independently. The wood blocks were exposed to the fungal decay with Tyromyces palustris. The degradation of the wood blocks treated with these preservatives was quite widely different among wood species examined in this study. Hem-fir treated with CCA...
K Yamamoto, S Matsuoka
Interim report on world survey of sap displacement impregnation of timber
1974 - IRG/WP 329
At the 4th Annual Meeting of the IRG held in West Berlin in October 1972 it was suggested that a survey of sap displacement impregnation of timber would be of interest. Accordingly through the courtesy and co-operation of the New Zealand Department of Trade and Industry a questionnaire was circulated to the Trade Commissioners for transmission to the relevant organisations in various parts of the ...
F B Shorland, C G W Mason
Leaching of active components from preservative-treated timber - Ongoing research: Status after approx. 4 months’ out-door exposure
2003 - IRG/WP 03-20276
The Danish Technological Institute is together with manufacturers of active ingredients and formulators of wood preservatives running a project aiming at finding realistic leaching rates from preservative treated wood in hazard class 3 (above ground). The project is focussed on developing a field trial method for investigating leaching.
According to BPD hazard assessment has to be carried out f...
N Morsing
Bacterial brown stain on sawn timber cut from water-stored logs
1992 - IRG/WP 92-1532
Brown stains which appear on the surface of sawn radiata pine cut from water-stored logs were identified as tannin-like compounds. They are derived from bacterial breakdown of flavanoid-glucosides. When timber is sawn from infected logs, the free flavanoids migrate to the wood surface as the timber dries. There, they condense and oxidise to form permanent brown discolourations. Stains occurred on ...
M E Hedley, R Meder
IRG/COIPM INTERNATIONAL MARINE TEST - to determine the effect of timber substrate on the effectiveness of water-borne salt preservatives in sea-water. Progress Report 6: Report of third inspection (24 months) in Australia
1980 - IRG/WP 456
This report presents the results of the third inspection of the IRG/COIPM International Marine Test specimens installed at the Goat Island Marine Biological Station of the Maritime Services Board of New South Wales, in Sydney Harbour. The inspection was completed on 5th December, 1979, after 24 months exposure. As on previous occasions, this inspection was carried out in conformity with the provis...
J Beesley
Hardwood field experiment: Progress report 1977-82
1982 - IRG/WP 3200
The international hardwood field experiment was planned in 1976 and set up in some 30 different sites around the world. The test stakes include 4 reference species common to each site and in most cases at least 2 species of local importance. It was hoped that a picture of performance of a range of economically important species would be built up and at the same time provide vital background inform...
D J Dickinson, J F Levy
Dip-diffusion of dressed timber - Effect of drying
1990 - IRG/WP 3603
The effect of drying on BFCA dip-diffused, dressed, freshly sawn timber was determined by the depth of penetration of boron achieved on two test timber species, White Cheesewood (Alstonia scholaris) and Light Hopea (Hopea papuana). The results obtained showed that the light density White cheesewood was completely penetrated even after 3 days drying while Light Hopea, treated immediately achieved 5...
H C Konabe
IRG/COIPM INTERNATIONAL MARINE TEST - to determine the effect of timber substrate on the effectiveness of water-borne salt preservatives in sea-water. Progress Report 14: Report of fifth inspection (48 months) in Australia
1982 - IRG/WP 484
This report presents the results of the fifth inspection of the IRG/ COIPM Internatlonal Marine Test specimens installed in Sydney Harbour in December, 1977. This inspection took place on 9th December, 1981, just 48 months after the specimens were installed. Earlier reports have contained full details of the treatment and installation of the specimens as well as results of all previous inspections...
J Beesley
Does Limnoria lignorum (Rathke) or other cold-water xylophagous limnoriid species exist in southern oceans?
1989 - IRG/WP 4152
The question is posed whether the cold-water limnoriid wood borer Limnoria lignorum (Rathke), or any other such cold-water limnoriid exists in southern oceans. The evidence of collections from various high latitude southern coastlines is cited and the singular absence of any cold-water limnoriid borer noted. The need for further. and possibly extensive, searches for such borers is stressed. i.e. i...
J E Barnacle, L J Cookson
The colonisation pattern of anaerobic fungi in wood
1989 - IRG/WP 1403
Timber foundations may be degraded in service in anaerobic conditions. The present work was conducted to investigate whether anaerobic fungi could colonise wood, using rumen fungi as test microorganisms. Strictly anaerobic fungi were isolated and purified from cow dung and goat and sheep rumen fluids respectively. Colonisation of Eucalyptus grandis and Pinus patula by these fungi and Neocallimasti...
A H Wiederhold, M Morrison, A A W Baecker
Structural defects in CCA treated timber fence posts: A case study.
1997 - IRG/WP 97-40084
Since 1983 an environmental improvement programme has been in progress in the city of Dundee. This programme included the erection of rail and pale timber fencing throughout the city. The timbers had been pressure treated with CCA prior to painting with 2 coats of an exterior wood stain finish. However, the larger dimension timber fence posts (100 x 125 x 1500 mm3) regularly developed severe check...
S Muhsin, D C R Sinclair, A Bruce, H J Staines
Ecotoxicological behaviour of leachates from superficially treated timber as an approach for a test strategy of environmental risk assessment in wood preservation
1998 - IRG/WP 98-50101-09
At present for wood preservatives, which in Germany are subject to the quality mark of the RAL-Gütegemeinschaft Holzschutzmittel, health and safety as well as environmental aspects are evaluated by official authorities, as BgVV (Federal Institute for Consumer Health Protection and Veterinary Medicine) and the UBA (Federal Environmental Agency).
From the environmental point of view to day there a...
H W Wegen, U J Lucks
Kinetics and mechanism of fixation of Cu-Cr-As wood preservatives. Part 5: Effect of wood species and preservative composition on the leaching during storage
1975 - IRG/WP 354
Conversion reactions during storage of CCA treated wood take place even at and below the fiber saturation point as long as ion transport is possible. Increase in drying temperature increases the final pH of the treated wood and the leachability of Cu and decreases slightly the leachability of Cr, while the leachability of As is not affected. This temperature effect is considered to be of no techni...
S-E Dahlgren
Durability of Anogeissus acuminata timber used for plank-built catamarans
2005 - IRG/WP 05-10551
Catamaran, the most versatile traditional fishing craft used along the Indian coast is made hitherto of solid timber of a few selected species of broad-leaved soft woods. Due to scarcity coupled with high cost of these timbers, the craft, of late, are fabricated from the wooden planks of an indigenous hardwood species, namely, Anogeissus acuminata (Yon) belonging to the family Combretaceae. Infor...
M V Rao, M Balaji, V Kuppusamy, K S Rao
Performance of preservative-treated timber against biodeterioration in Indian waters
1984 - IRG/WP 4106
Results on the investigation on the durability of panels of 32 timber species, pressure-treated with various preservatives and exposed along the Indian coast for varying periods upto a maximum of 15 years, are summarised. Panels of even non-durable timber gave excellent results against biodeterioration after treatment. Their life was comparable to that of treated durable timber. The preservative t...
L N Santhakumaran, J C Jain, M C Tewari
Severe decay damages of bridges made of ekki (Lophira alata) wood known as a durable species
2000 - IRG/WP 00-10383
Bridges made of ekki (azobe, bongossi, Lophira alata Banks et Gaertn.) timbers were severely decayed only 10 years after the construction possibly caused from no maintenance for the periods. The reason of no maintenance is due to the misunderstandings on wood durability against wood-decaying fungi. Some civil-engineers and architectures understand "durable species" means "absolutely decay-durable ...
S Doi, T Sasaki, Y Iijima
Laboratory evaluation of termite resistance of five lesser-known Malaysian hardwoods used for roof and ceiling construction
2001 - IRG/WP 01-10398
The general laboratory procedure of AWPA E1-97 was used to evaluate the termite resistance of 5 lesser- known species (LKT) of Malaysian hardwoods: Kekatong (Cynometra sp.), Kelat (Eugenia spp.), Mempening (Lithocarpus spp.), Perah (Elateriospermum tapos) and Pauh Kijang (Irvingia malayana) against the subterranean termite Coptotermes curvignathus over 28 days. Kempas (Koompassia malaccensis) and ...
A A H Wong, Kee Suan Cheok, J K Grace
Cellular and fractural failure after supercritical fluid impregnation of four wood species
2004 - IRG/WP 04-10503
Supercritical fluids (SCFs) have been investigated for delivering biocides into sawn wood. Pressure differentials during treatment may exceed the compressive or tensile strength perpendicular to grain, creating a potential for transverse deformations that exceed elastic strain limits. Wood treated by SCF processing with CO2, a potential biocide carrier, was inspected macroscopically and microscopi...
M E Anderson, R J Leichti, J J Morrell
Losses of CCA components and creosote from treated timber to soil
1997 - IRG/WP 97-50098
Components of creosote and CCA preservatives can migrate within the wood and move into surrounding soil. However, at present, the ecological significance of such losses is uncertain. This paper examines the distribution of four target polyaromatic hydrocarbons (PAHs ) and of copper, chromium and arsenic in treated stakes and surrounding soil after long term exposure in field trials. Concentrations...
N J Hudson, R J Murphy
Laboratory and Pilot Evaluation of Chlorothalonil Formulations for Mold and Stain Control on some Wood Species
2003 - IRG/WP 03-30317
Laboratory and pilot test of the efficacy of several fungicides such as chlorothalonil and carbendazim for control of mold and sap- stain on bamboo and slash pine and rubberwood were conducted in this paper. The result indicates that:
-- Clorothalonil/carbendazim are more effective for controlling mold and stain than that of carbendazim alone in laboratory test.
--Higher concentration at 0.1-0.2...
Mingliang Jiang, Zhaobang Li
Occurrence of termite species on decaying heartwood specimens exposed 18 to 23 years at an Australian site
1998 - IRG/WP 98-10270
The occurrence of species of subterranean termites on hardwood and softwood specimens (including preservative-treated), exposed in-ground at a semi-arid site at Walpeup (north-western Victoria), 18 to 23 years after installation, is reported. This paper presents maps of the cumulative occurrence on specimens, after six annual inspections, of the following species: Coptotermes acinaciformis, Hetero...
J W Creffield, J-D Thornton, G C Johnson
Timber deterioration and its prevention in marine environment
2005 - IRG/WP 05-10559
Wood-borer activity is an established fact in Mumbai harbour that leads to severe deterioration of timber. In order to prevent the deterioration caused by wood borers three resin preservatives containing Zinc borate, Organo-copper polymer (4 wt% Cu) and Organo-Tin polymer Copoly(TBTM-MMA) were used for timber treatment. Test panels were treated using standard method and the...
B S Swami, M Udhayakumar, P Kumar, A B Samui
On the laboratory use of X-rays in timber decay evaluations
1981 - IRG/WP 2144
The paper reports the results of laboratory experiments on the X-raying of some Pinus radiata sapwood blocks infected with Serpula lacrymans to determine the effect of density and moisture content on the absorption of X-rays by wood. It is concluded that with increasing moisture content there is a very marked increase in time required to pass a constant quantity of X-rays through a test block and ...
J D Thornton, J W Creffield, O Collett
On the occurrence of Phialophora species in preservative treated wood in ground contact
1977 - IRG/WP 163
Phialophora is a fairly large genus comprising about thirty described species. They are widespread in very diverse environments, such as soil, sea water, wood and wood pulps. Some species are known as parasites on plants and animals, including man. Phialophora species were early known for their ability to produce blue stain in timber. Later it was discovered that several species were able to produ...
T Nilsson, B Henningsson
Moisture content development in lap-joints of different wood species in outside exposure trials
1998 - IRG/WP 98-20143
Lap-joint trails (following European Standard EN 12037) were set up with 11 different softwood and hardwood species. Half of the number of the lap-joint specimens were coated with an alkyd coating. The moisture development has been followed during a 19 months period. In this paper, the out comes of different moisture contents evaluations are presented. The results show, that the moisture content o...
H Militz, M Broertjes, C J Bloom