Your search resulted in 422 documents. Displaying 25 entries per page.
Incidence of soft rot in creosoted poles
1992 - IRG/WP 92-1554
A further population of creosote-treated poles has been assessed for the occurrence of soft rot, as a continuation of work reported in IRG Document No. IRG/WP/1368. The outer 1 cm of each core was assessed microscopically and graded for the presence of soft rot cavities in the wood cell walls; with further assessments taken at a consecutive 1cm interval for cores showing positive findings. Followi...
D J Dickinson, P W McCormack, B Calver
Interim balance after 20 months of lap-joint exposure
1999 - IRG/WP 99-20164
The application of natural resins and integrated resin systems to improve the performance of Pinus sylvestris was assessed in a lap-joint test according to DIN V ENV 12037 (1996). Lap-joints of Pinus sapwood were exposed at the test field in Hamburg (Germany) in May 1997. The treated lap-joints were assessed with regard to the performance of the resin treatments out of ground. The exposure of lap-...
M Sailer, A O Rapp, R-D Peek, A J Nurmi, E P J Beckers
Termite resistance of Malaysian and exotic woods with plantation potential: Field evaluation
1998 - IRG/WP 98-10289
An in-ground resistance of selected Malaysian and exotic timbers to attack by a representative aggressive subterranean Coptotermes termite was evaluated as part of an on-going collaborative research between the Forest Research Institute of Malaysia and the University of Hawaii on termite control of building timbers under humid tropical conditions. A test site at FRIM, highly susceptible to the sub...
A H H Wong, J K Grace, L H Kirton
Evaluation of outdoor weathering performance of modified wood
2004 - IRG/WP 04-20296
Interlace treated, oil treated, silicon treated as well as untreated Scots pine samples have been exposed outdoors. For evaluating the samples on their long term performance an internal standard had been developed. Parameters to be determined were the uptake of liquid water (submersion test), weight variation during exposure, crack performance, surface roughness and colour change.
This paper disc...
Y Schulte, S Donath, A Krause, H Militz
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
Field evaluation of the above-ground susceptibility of Pinus heartwood and untreated or treated sapwood to two species of Australian subterranean termites
1996 - IRG/WP 96-10147
Plantation-grown Pinus elliottii, Pinus caribaea and Pinus radiata specimens containing heartwood and untreated or preservative-treated sapwood were exposed above ground to the subterranean termites Coptotermes acinaciformis or Mastotermes darwiniensis near Sydney (NSW), Brisbane and Townsville (Qld), and Darwin (NT), using a variety of exposure techniques. Heartwood of Pinus elliottii and Pinus c...
M J Kennedy, J W Creffield, R H Eldridge, B C Peters
A soil-less test of treated wood
1978 - IRG/WP 2105
The objective of this work is to devise an accelerated test for preservatives to be used in places away from soil contact. There may be compounds or mixtures which will protect wood or wood derived materials from decay in such articles as sash and doors, boardwalks, steps, laminated arches and the like, and possess properties that make them preferable to the heavy-duty preservatives used for poles...
E A Behr
The remaining concentration of inorganic wood preservative components in EN 252 stakes after ground contact
2000 - IRG/WP 00-50159
In order to determine the biological efficiency and the remaining concentration of different inorganic and organic active ingredients during service, EN 252 specimens were impregnated with 3 copper based wood preservatives. The stakes were installed in the test field of the DESOWAG GmbH, Rheinberg, for at least 7 years. At the end of the field test some of these stakes were divided into 10 uniform...
E Melcher, H-W Wegen
Resistance of borate-treated lumber to subterranean termites in the field
1998 - IRG/WP 98-10255
Borate-treated wood samples were tested for their resistance against subterranean termites in the field. Wood samples (10.5x10.5x40cm3) of western hemlock were pressure impregnated with disodium octaborate tetrahydrate (DOT) and didecyldimethylammonium chloride (DDAC), and assigned into two groups on the basis of boron contents:high retention (1.5-2.2%BAE) and low retention(O.7~1.3%BAE). Eight rep...
K Tsunoda, A Adachi, T Yoshimura, A Byrne, P I Morris, J K Grace
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
Identification of brown rot fungi on wood in above ground conditions by PCR, T-RFLP and sequencing
2004 - IRG/WP 04-10512
Fungi selected in test fields in Germany and Estonia and fungi (Coniophora puteana) cultivated on medium have been identified by the molecular methods PCR (Polymerase Chain Reaction), T-RFLP (Terminal Restricted Fragment Length Polymorphism) and sequenced to species level. The samples from the German field test showed that the fruit body sample was a different fungus than from the mycelium sample....
U Råberg, N Högberg, C J Land
Co-operative research project on L-joint testing. Sampling after 18 months exposure
1984 - IRG/WP 2233
In September 1983, Document No: IRG/WP/2208 was distributed giving guidance on sampling after 8 months exposure (due 1 December 1983 for those L-joints exposed on schedule on 1 April 1983), and including tables on which to record the test results. No major problems have been notified to Princes Risborough Laboratory concerning the sampling method. It is therefore proposed that the next sampling, a...
J K Carey, A F Bravery
Field Trials with mini-stakes
2002 - IRG/WP 02-20244
In 1995 an extensive field test program with wood mini-stakes, 8 x 20 x 200 mm, was started. In these trials a large number of parameters are being evaluated, including several new wood preservatives, differently chemically modified woods and natural durability of various wood species. The test sites are three fields in Sweden for in-ground and “close to ground” testing, one subterranean termi...
M Westin, A O Rapp, Y S Hadi, T Nilsson
Protection of buildings, other structures and materials in ground contact from attack by subterranean termites with a physical barrier - a fine mesh of high grade stainless stee
1993 - IRG/WP 93-10014
A new type of physical barrier for the prevention of attack by subterranean termites on buildings, other structures and materials in ground contact - a fine mesh of highalloy (originally 304, now 316) stainless steel - has recently been developed and patented worldwide by industry in Australia. The termite resistance of the material was assessed by CSIRO in laboratory and field trials. In the labo...
M Lenz, S Runko
Window test. Direct testing of wood resistance to decay: A study of its fitness, its reliability and its accelerating factor
1984 - IRG/WP 2219
This is the results of an experiment using the window-test specimens, exposing the specimens to three different types of testing procedure: 1. Natural infestation in the open air; 2. Artificial infestation and exposure in the open air; 3. Artificial infestation in a green-house. The results show good similiraties of the three parallel tests in term of decay, and assess the reliability of the windo...
G R Y Déon, L N Trong
Artificial weathering exposure as an alternative for standard ageing according to EN 84 (leaching) and EN 73 (evaporation)
2002 - IRG/WP 02-20254
In order to verify potential weaknesses of wood preservatives fungal tests are carried out after ageing of wood preservative treated test blocks. The European standard EN 599 as a framework for efficacy assessment of wood preservatives includes the use of two ageing methods prior to fungal testing, namely a leaching method (EN 84) and an evaporation method (EN 73). The European research project "F...
J Van Acker, M Grinda, D J Dickinson
Performance of Borate-treated lumber in a four-year, above-ground termite field test in Hawaii
2001 - IRG/WP 01-30265
We report the fourth year 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% shell and through) wood treatments. In Hawaii, chromated copper arsenate (CCA, 4 kg/...
J K Grace, R J Oshiro, A Byrne, P I Morris, K Tsunoda
Leaching from CCA-treated wood submerged in seawater: Effect of high loadings, and a comparison between laboratory and marine conditions
1996 - IRG/WP 96-50080
This study of leaching examined the following variables: CCA loading; marine versus laboratory exposure and length of submergence. Blocks of Pinus sylvestris were treated to a range of nominal retentions from 15 to 50 kg/m³. Each block was then divided into three cubes and all transverse faces were sealed. All cubes were allowed to fix at ambient temperature for a minimum of one week. One set of ...
R M Albuquerque, S M Cragg, J D Icely
Ten Year Marine Borer Exposure Trial of Chlorothalonil and Emulsified Preservatives in Australia
2003 - IRG/WP 03-30314
Results of a ten-year marine exposure trial at Townsville and Port Stephens are presented. Sawn Pinus radiata and natural round Eucalyptus obliqua specimens were treated with preservatives including creosote (HTC), pigment emulsified creosote (PEC), chlorothalonil, and the oil emulsions of CCA called PROCCA and HYCON. Basic zinc chloride treatment was also exposed at Townsville. Some of the findin...
L J Cookson, D Scown
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
The efficacy of polymer/preservative treatments in soil-bed exposure
1992 - IRG/WP 92-3729
Southern pine was treated with CCA, CCB, sodium borax/boric acid, or disodiumoctaborate, alone or in combination with an acrylic polymer system containing a water repellent. Treated samples were subjected to an unsterile soil burial test. The addition of polymer reduced the weight loss in borontreated samples at the lower retentions but not at the higher retention. Results with borates indicate th...
R J Murphy, H M Barnes, S M Gray
Leaching of Boron - more than 3 years of field exposure
1997 - IRG/WP 97-30143
The diffusibility of Boron in wood and thus the ability of its leaching is known since long. Nevertheless quantitative data on this process are only rarely available. To overcome this lack of information field exposure tests were started with beam-segments treated with pure boric acid and poles treated with CCB. In addition some of the beam-segments were surface-treated with a varnish to investiga...
A Peylo, H Willeitner
Remedial ground-line treatment of CCA poles in service. A progress report after 28 months' testing
1988 - IRG/WP 3481
Remedial treatments of CCA-treated poles in service with incipient soft rot were carried out with boron rods, boron/glycol solution, boric acid paste, copper/creosote paste and a commercial product (DFCK paste) respectively. The micro-flora before remedial treatment and 6 months after as well as the spread of chemicals in the poles were reported in Document No: IRG/WP/3388. In this progress report...
B Henningsson, H Friis-Hansen, A Käärik, M-L Edlund
The use of selective media for studying the colonization of wood in ground contact by microorganisms
1978 - IRG/WP 186
In October1976 a field trial was set up in order to monitor the progressive colonisation of wood in ground contact using orientated small stakes of Scots pine (Pinus sylvestris) and birch (Betula sp.) (30 x 45 x 250 mm³). Half the number of each species were treated with a 1% solution of CCA by a vacuum impregnation process. All the stakes were coated on three sides with an epoxy-resin sealant to...
C P Clubbe
Observation on the performance of CCB and creosote treated fence posts after 18 years of exposure in Greece
2002 - IRG/WP 02-30288
The effect of 18 years exposure on toughness of CCB and creosote combination treated pine was examined. Vacuum CCB treated fence posts were subsequently treated at their lowest part (ground contact) with creosote using the open hot and cold tank process. After 18 years exposure under warm dry temperate climatic conditions in Greece, samples were taken from the above ground contact, top, middle a...
J A Kakaras, G J Goroyias, A N Papadopoulos, M D C Hale