Your search resulted in 660 documents. Displaying 25 entries per page.
L-joint trials: Part 2: The relationship between colonisation by decay fungi and long-term performance
2002 - IRG/WP 02-20251
Many of the L-joint trials conducted at BRE were assessed during the early stages to establish the rate of colonisation by fungi, principally basidiomycetes. At that time, a system of assessment incorporating colonisation studies was proposed for inclusion within the European Standard EN 330 but was rejected for the final version of the standard. The long-term trials associated with the colonisa...
J K Carey
Determination of the water sorption properties and preliminary results from field tests above ground of thermally modified material from industrial scale processes
2004 - IRG/WP 04-40279
In this study the differences in moisture behavior and durability above ground of heat treated wood originating from different European industrial heat treatment plants by means of the water sorption properties as well as field tests were examined. The manufacturers of heat treated material were: PLATO Hout B.V./Netherlands, Thermo Wood (Premium wood)/ Finland and Menz Holz/ Germany,
where Oil-...
C R Welzbacher; A O Rapp
Termite-tunnels formation on the surface of termite-resistant wood species in field sites
2001 - IRG/WP 01-10400
In this report, termite-tunnels formation by the subterranean termite, Coptotermes formosanus Shiraki on the surface of termite-resistant wood species, namely, Hinoki (Chamaecyparis abtsu), Yoshino Hinoki (Chamaecyparis abtsu), Miyazaki Hinoki (Chamaecyparis abtsu), Hiba (Chamaecyparis abtsu) and Japanese cedar (Cryptomeria japonica) was conducted in field sites. Westernhemlock (Tsuga heterophylla...
Y Kadekaru, K Kinjo, S Yaga
The full guideline for the “double layer test method” - A field test method for determining the durability of wood out of ground
2004 - IRG/WP 04-20290
This guideline describes a test method for wood to be exposed to the weather out of ground contact. The main objective of the method is to evaluate the durability of wood in above ground exposure as shifted overlaid stakes, which form the so called double layer.
The method is applicable to the testing of untreated, treated and modified wood. Initially it was developed and found to be most useful ...
A O Rapp, U Augusta
Marine trials with ammoniacal wood preservatives
1980 - IRG/WP 423
Ammoniacal wood preservatives have been known for many years and are considered among the best water-borne systems for protecting wood in ground contact. In recent years attention has been increasingly focussed on these preservatives because of their ability to penetrate difficult-to-treat species better than most other fixed water-borne preservatives. This is particularly important for example, i...
M A Hulme, D P Ostaff
Hardwood field experiment - 10 year report
1989 - IRG/WP 3560
The international hardwood field experiment was planned in 1976 and set up in some 34 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 (supplementary species). It was hoped that a picture of performance of a range of economically important timber species would be built up and at the same time ...
D J Dickinson, S M Gray
How predictive are laboratory experiments for assessing the effects of chitin synthesis inhibitors (CSI) on field colonies of terrnites? - A comparison of laboratory and field data from Australian mound-building species of termit
1996 - IRG/WP 96-10143
A singular advantage of using mound building species of termite is their directly accessible nest. This allows evaluation of control methods by accurate assessment of the effects at the colony level. The mound building species Coptotermes acinaciformis (Froggatt) and Nasutitermes exitiosus (Hill) were used to test the CSI, hexaflumuron, in laboratory and field trials. Laboratory results showed tha...
M Lenz, P V Gleeson, L R Miller, H M Abbey
Options for termite management using the insect pathogenic fungus Metarhizium anisopliae
1996 - IRG/WP 96-10142
The insect pathogenic hyphomycete fungus Metarhizium anisopliae (Metschnikoff) Sorokin is promising as a biological insecticide for many species of subterranean termites. In Australia, a survey of termite mounds and feeding sites using a selective medium showed that this fungus is widespread but rarely causes mortality of termites under natural conditions. One isolate, codenamed FI610, has been se...
R J Milner, J A Staples, M Lenz
L-joint trials: Part 3: Relative performance of a range of preservative products
2002 - IRG/WP 02-30292
Long-term trials using the L-joints described in BS EN 330 and AWPA Standard E9-97 have been in progress at BRE since 1982.
This paper records the current assessments of decay of L-joints in trials started between 1982 and 1994 with treatments applied to both Scots pine sapwood (Pinus sylvestris) and spruce (Picea sp.). Data are provided on a range of active ingredients including TnBTO, PCP, a...
J K Carey
Termite Field Tests of Various Timber Species Treated with permethrin using supercritical carbon dioxide
2005 - IRG/WP 05-10560
Termite field tests were conducted on permethrin-treated Eucalyptus obliqua heartwood, Pinus radiata sapwood and P. radiata LVL. The permethrin was impregnated using either supercritical carbon dioxide (scCO2) or light organic solvent preservative (LOSP) systems. Comparative permethrin retentions were most accurately achieved in P. radiata sapwood, where no difference between impregnation systems ...
A Qader, L J Cookson, J W Creffield, D Scown
An Australian test of wood preservatives. Part 1: Preservatives, principles and practices
1978 - IRG/WP 2123
Between November, 1963, and July, 1964, a graveyard test of some 6000 preservative-treated stakes was installed at 8 sites equally distributed between Papua New Guinea in the tropics, through Queensland and New South Wales to Victoria. More than 40 different preservatives and preservative mixtures, mostly at several different levels of retention, were used to impregnate sawn specimens of Pinus rad...
J Beesley
Copper naphthenate-treated Southern Pine pole stubs in field exposure: - Part 1: Gradient & biodeterioration analysis 12 years after treatment
2000 - IRG/WP 00-30242
Naphthenates have been used for the preservation of timber and cellulose since their original identification in Russia in the early 1880's as part of a series of petroleum characterizations. Later work in the development of copper naphthenate as a heavy-duty preservative for poles led to the development of various treating cycles similar to other oil-borne systems. Recent work concerning ...
H M Barnes, M H Freeman
Chlorothalonil: A new ground contact wood preservative
1992 - IRG/WP 92-3712
Extensive investigations have been conducted in recent years on the performance of chlorothalonil (tetrachloroisophthalonitrile) as a ground contact wood preservative. Efficacy information is presented on a soil block test with 11 Basidiomycetes, a fungus cellar evaluation, above-ground field testing against termites in Australia and Hawaii, and ground-contact field stakes installed in Florida (9 ...
P E Laks, T L Woods
Some Experiences with Stake Tests at BAM Test Fields and in the BAM Fungus Cellar
Part 2: Comparison of Static and Dynamic Moduli of Elasticity (MOE)
2005 - IRG/WP 05-20320
In routine in-ground stake tests of wood preservatives at the BAM test field Horstwalde and in the BAM fungus cellar periodical determinations of both static moduli of elasticity (MOE) on the basis of bending tests and dynamic MOE on the basis of the vibration method were performed as a possible method for the assessment of fungal attack. As expected from other publications, the absolute values of...
M Grinda, S Göller
Preservative treatment and field test monitoring of spruce pole stock: Pressure and diffusible chemical treatments
1990 - IRG/WP 3605
One hundred and forty four spruce (test species) and southern yellow pine (reference species) poles were variously treated by center boring, incising, or kerfing, followed by pressure treatment with CCA and/or diffusible preservatives. The diffusible preservatives included NaF/creosote, borax and ammonium bifluoride. The poles were set at a test site and evaluated for preservative distribution and...
B Goodell, A J Pendlebury
Steam/hold/APM boron treatment - Treatability trials with green gauged radiata pine
1987 - IRG/WP 3439
Freshly sawn 100 x 50 mm radiata pine was green gauged, steam conditioned and preservative treated with a mixture of borax and boric acid using a modified Alternating Pressure Method (APM) treatment schedule. A 12 hour holding period between steam conditioning and treatment resulted in the necessary moisture loss and moisture re-distribution to facilitate treatment to NZ Timber Preservation Author...
P Vinden
Natural durability of 4 different Larix species tested in soil contact
2002 - IRG/WP 02-10434
Importers of Siberian Larch claimed to have a material which can replace pressure treated wood in soil contact. This gave reason to investigate the durability of 4 different Larix species (L. decidua, L. sibirica, L. decidua x sibirica, L. gmelini var ologenis) coming from 7 different origins in comparison with sapwood of Pinus sylvestris untreated as well as pressure impregnated with retentions o...
A O Rapp, H Viitanen, T Nilsson
A field test with anti-sapstain chemicals on sawn pine timber stored and seasoned under different conditions
1984 - IRG/WP 3245
Newly sawn timber of European redwood (Pinus sylvestris L.) was dip treated in four different anti-sapstain chemicals. The protectife effect against sapstain, mould and decay was examined after 10 weeks' and 10 months' storage in open and closed stacks. The results showed that the performance of individual chemicals was different in open and close stacks, although the wood as wel...
D J Dickinson, B Henningsson
The field performance of CCA-C treated sawn refractory softwoods from North America
1997 - IRG/WP 97-40085
Approximately 15% of the total volume of wood treated in the United States consists of difficult to treat softwoods known as "refractory softwoods". The long term positive performance record of CCA treated sawn material is based upon the testing of yellow pine sapwood stakes with only limited field data available for sawn refractory softwoods. As a result, the existing North American wood preserva...
M J Richards, W S McNamara
Termite physical barriers: Is retrofitting with Granitgard an option?
1993 - IRG/WP 93-40011
Granite particles within the range of 2.4 to 1.7 mm diameter were recently adopted by the Standards Association of Australia as an alternative treatment to soil chemical barriers in protecting new buildings against subterranean termites. The granite substrate is sold under the commercial name, "Granitgard". However, there are many existing buildings that have no chemical or physical subterranean t...
J R J French, B M Ahmed
Biostatic film as a primary treatment against pole failure in soil
1995 - IRG/WP 95-40053
Field liners of low density polyethylene (LDPE) film applied as primary treatment of soil-contact surfaces of creosote-treated poles prevented their detoxification and premature failure by establishing hurdles against microbiological colonisation. These hurdles include low water activity, low oxygen tension and nutrient limitations. Moreover, under conditions of high soil moisture, field trials sh...
A A W Baecker, M Behr
Natural progression of decay in unrestrained, Southern pine sapwood exposed above ground
1995 - IRG/WP 95-20060
In this study, the natural progression of decay is being monitored in 2.4-m (8-ft) lengths of dimension lumber. The 2.4-m lengths are supported without restraint in a horizontal plane approximately 0.75 m above ground in a partially shaded field plot in southern Mississippi. The lumber is 100% sapwood. Prior to installation in the field, each piece was planed to exactly 38 by 89 mm² (1.5 by 3.5 i...
R C De Groot, R J Ross, W Nelson
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
Laboratory evaluation of potential antisapstain treatments for Pinus radiata
1983 - IRG/WP 3237
Twelve formulations were tested in the laboratory using a 'mini' board test for effectiveness on Pinus radiata (D. Don) against sapstain, mould and decay fungi. Three formulations, sodium pentachlorophenoxide (NaPCP) plus borax, Haipen 50 WP, and Mitrol 375, are used commercially in New Zealand. Busan 1009 (0.5% product), IWD Product A (0.2% ai), IWD Product B (0.3% ai), Fennotox...
J A Drysdale
A field method for determining the above-ground resistance of wood and wood products to attack by subterranean termite
1994 - IRG/WP 94-20035
A method for determining the above-ground resistance of wood and wood products to subterranean termites in the field is described. Termites are aggregated in 20-litre steel drums, each containing a highly susceptible timber substrate. At the centre of each drum, specimens of the test material under evaluation are sandwiched, using circular sections of wire mesh, between two layers of the substrate...
J W Creffield