Your search resulted in 977 documents. Displaying 25 entries per page.
Life Cycle Assessment of borate treated wood
2005 - IRG/WP 05-50224-12
Life Cycle Assessment (LCA) is being used increasingly around the world by decision-makers to help incorporate the environmental component of sustainability into their activities. U.S. Borax regularly assesses how its products contribute to sustainable development. Using data gleaned from LCA of its products, the company recently completed its first ISO 14040 compliant cradle-to-grave LCA of lum...
M J Manning
A field evaluation of modified and unmodified alkylammonium compounds
1987 - IRG/WP 3436
Laboratory soil block studies of alkylammonium compounds (AAC's) at Forintek and other research establishments have shown that they can prevent decay by standard wood-destroying fungi. Their performance in field tests, however, has been disappointing. Following investigation of possible causes for this poor field performance, stakes treated with modified AAC's were installed at W...
J N R Ruddick
Present status of using treated wood and private house owner’s expectations in Bangladesh
2004 - IRG/WP 04-30329
In a developing country like Bangladesh more than 80 % of the total population lives in rural areas where building materials are mainly comprised of wood, bamboo, thatch grass, golpata, etc. All these materials, being cellulosic, are easily infected by deteriorating agencies like fungi, termites, beetles etc., as climatic condition of the country is ideal for their thrive. This is a great wastage ...
M A Islam, A K M A Bosunia, S C Ghosh, M O Hannan, A K Lahiry
Quantification of creosote migration down wooden poles and the prevention of its depletion during flood irrigation
1994 - IRG/WP 94-50032
Polyethylene field liners heat-shrunk onto soil-contact surfaces prevented decay of creosote-treated Eucalyptus grandis vineyard poles under flood-irrigation. The present work quantified losses of creosote from these poles after six and 24 months' service. After six months' service the mean creosote retention of unlined poles above the ground line was 12.62% (m/m dry wood), with ...
M Behr, A A W Baecker
Limnoria quadripunctata Holthuis - a threat to copper-treated wood
1983 - IRG/WP 4100
This paper presents the first reported attack by the crustacean marine wood-borer Limnoria quadripunctata Holthuis of CCA treated eucalypt piles. The attack occurred after 12 years service of the piles in the River Derwent at Hobart, Tasmania. Attack by both this borer and Limnoria tripunctata Menzies is also reported in CCA treated softwoods and hardwoods over periods ranging from 5 to 22.9 years...
J E Barnacle, L J Cookson, C N McEvoy
Depletion of preservatives from treated wood: Results from laboratory, fungus cellar and field test
1993 - IRG/WP 93-50001-07
This paper compares results of preservative component losses using a range of test procedures with several different water-borne preservatives. The data shows that laboratory leaching tests are in some cases comparable to, but in other cases significantly underestimate preservative component losses when compared with field or fungus cellar depletion tests. The results also suggest that preservativ...
L Jin, A F Preston
Leaching of Copper from ACQ treated wood exposed above ground
2004 - IRG/WP 04-50219
The leaching of chemicals of ACQ Type C treated wood exposed above ground for 16 months was studied. Commercially treated Hem-fir boards (Tsuga heterophylla Raf. and Amabilis fir Forb) of 37.5 mm by 87.5 mm were used. The amounts of chemical leached monthly by the rainfall were determined and the leachate was collected and analyzed. Also, the environmental factors influencing the leaching were ...
P A Chung, J N R Ruddick
The use of low cost X-ray fluorescence instruments in the determination of copper chromium and arsenic in preservative treated wood
1987 - IRG/WP 2278
Internal quality control in timber treatment plants can be pursued by analysis of preservative treatment solutions and treated timber. Treaters must proceed with costly and lengthy analyses through analytical laboratories. An alternative approach for the timber treater, is to use low cost analysers (L.C.A.'s) based upon x-ray fluorescence. Detailed comparisons have been made between stand...
J Norton, L E Leightley
Preservative leaching from copper-chrome-arsenic treated timber: Towards an international standard for environmental monitoring
1996 - IRG/WP 96-50076
A review of standards and legislative requirements around the world relating to environmental contamination from copper-chrome-arsenic wood preservative indicates a plethora of methodologies for expressing and determining contamination levels. The imposition of arbitrary quarantine periods for treated timber, or special fixation processes, appear to be applied without a rational analysis of what l...
S Walley, P R S Cobham, P Vinden
LCA examination of preservative treated timber products and alternatives; initial results
1995 - IRG/WP 95-50040-04
Co-operative development of an LCA methodology suitable for application to preservative treated products has been carried out, based on scoping assessments of two products, CCA treated fenceposts and creosote treated distribution poles. The general results of these scoping exercices are described, based on the CCA case study. These include the identification of critical stages in the life-cycle on...
W Hillier, R J Murphy, D J Dickinson, J N B Bell
Leaching Characteristics of Alder Wood Treated with Copper Based Wood Preservatives
2005 - IRG/WP 05-50225
In this study, it was designed for determining leaching characteristics of CCA and alternatives wood preservatives. Alder wood blocks were treated with CCA (1 % and 2 %), ACQ-1900 (2 % and 3 %), ACQ-2200 (1 % and 2 %), Tanalith E 3491 (2 % and 2.8 %), Wolmanit CX-8 (% 1 and 2 %). Leaching studies were conducted according to AWPA E11-97. Copper analyses of leachate were determined Atomic absorption...
A Temiz, Ü C Yildiz, E D Gezer, S Yildiz, E Dizman
Quantification of creosote and fluoride in remedially-treated poles
1997 - IRG/WP 97-40097
Three creosoted transmission poles were put into service in 1961 and they were subsequently remedially-treated with a proprietary fluoride remedial paste formulation in 1981. The poles were removed from service in 1996 and their ground-contact regions were analysed for creosote and fluoride contents. It was found that the poles were undecayed. Creosote retentions decreased down the profiles of the...
B P Hill
A Novel Type of Multiple Cavity Attack in Wood Cell Walls of Heat-treated Timber Exposed in Seawater – Preliminary Observations
2004 - IRG/WP 04-10523
Samples of untreated and heat-treated Norway spruce and Douglas fir were submerged in Langstone Harbour, Portsmouth for 4 years at a depth of ca. 0.3 metres. The heat-treated samples had been prepared using the Plato process. Samples were initially assessed for the severity of marine borer damage and were then examined microscopically for evidence of microbial decay. Longitudinal and transverse wo...
R A Eaton, C Björdal, T Nilsson
Performance of borate-treated lumber in a protected, above-ground field test in Japan
2004 - IRG/WP 04-30344
This document is supplemental to the previous IRG document (Tsunoda et al., 2002).
An experiment to simulate the sill plate (dodai) of the Japanese houses was conducted at the termite field test site of the Wood Research Institute in Kagoshima, Japan where two economically important subterranean termite species [Coptotermes formosanus Shiraki and Reticulitermes speratus (Kolbe)] are established. ...
K Tsunoda, A Byrne, P I Morris, J K Grace
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
Removing Cu, Cr and As from CCA treated yellow pine by oleic acid
2003 - IRG/WP 03-50202
In this study, CCA treated yellow pine utility poles were cut into three different dimensions and 4 different pH levels (2, 2.5, 3.5 and 5) of Oleic acid was used. The leached wood samples were collected at the end of the 1, 3, 7 and 14 days to determine the remaining Cu, Cr and As concentrations. The concentrations of Cu, Cr and As were determined by X-RF. The effects of pH, dimension and duratio...
E D Gezer, Ü C Yildiz, S Yildiz, E Dizman, A Temiz
Microbial ecology of treated Lap-joints exposed at Hilo, Hawaii for 24 months
1997 - IRG/WP 97-20107
This paper is a continuation of previous work reported in IRG/WP 96-20089 by Molnar et al. (1996) in which Lap-joints, made from Southern yellow pine and treated with ACQ, DDAC or propiconazole were sampled over 12 months exposure at Hilo, Hawaii. 18 and 24 month samplings have since taken place and are reported here. TnBTO treated Lap-joints made of scots pine which were exposed later as a standa...
S Molnar, D J Dickinson, R J Murphy
Speciation of leachates from CCA-treated wood
2005 - IRG/WP 05-50224-27
Different species of arsenic and chromium are characterized by different toxicities and different mobilities. The environmental impacts of CCA-treated wood would therefore be a function of the chemical forms of the metal releases. As a consequence a series of tasks were undertaken to evaluate arsenic and chromium species from CCA-treated wood. The intent of these tasks was to quantify the total...
H M Solo-Gabriele, T G Townsend, Yong Cai, B I Khan, Jin-Kun Song, J Jambeck, B Dubey, Yong-Chul Jang
Leaching of components from CCF treated timber in ground contact
1998 - IRG/WP 98-50108
In order to investigate the depletion of different CCF-salts during service small stakes (10*10*450mm³) were treated with five water-borne wood preservatives and after fixation brought into ground contact for several years. After failing some of the broken down stakes were used to determine the remaining concentration of relevant ions and their distribution in different segments of the stakes.
A...
E Melcher
CCA removal from treated wood by chemical, mechanical and microbial processing
1998 - IRG/WP 98-50101-26
Most preservative-treated wood produced and consumed in the U.S. is treated with toxic inorganic compounds containing copper, chromium, and arsenic. Because chromated copper arsenate (CCA) is fixed to the wood, treated wood has not been considered toxic or hazardous and is currently landfilled. Increasing public concern about environmental contamination from treated wood combined with increasing q...
C A Clausen, R L Smith
Determination of thermal degradation of isothiazolone treated wood
1997 - IRG/WP 97-30154
Wood treated with 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one was the subject of thermal degradation study. The study included burning isothiazolone treated wood under various temperatures with and without oxygen. The result showed that no harmful combustion products, such as polychlorinated dibenzo-p-dioxins, polychlorinated dibenzo-p-furans and polychlorinated biphenyls, were detected. These fin...
Bing Yu
The effects of pH on leaching of copper-chrome-arsenate (CCA) from pressure-treated Kenyan-grown Eucalyptus saligna and Acacia mearnsii: Initial findings.
2002 - IRG/WP 02-30298
The effects of pH on leaching of CCA from pressure-treated Kenyan-grown Eucalyptus saligna and Acacia mearnsii were tested under laboratory conditions. Small samples of the two species (100mm x 30mm x 40mm) were smooth sawn from 8-year old trees to represent equal amounts of both sapwood and heartwood, air-dried to 12% moisture content, end-sealed, and pressure-treated at a commercial treatment p...
R Venkatasamy
The extraction of boron from treated wood for quantitative analysis: A comparison of procedures
1992 - IRG/WP 92-2414
The extraction of boron preservative from treated rubberwood and scots pine samples was compared using methods based on refluxing and extraction in 1N NaOH or distilled water at 80°C. The extract solutions were analysed by Inductively Coupled Plasma spectroscopy (ICP/AES). A simple extraction procedure based on immersion of wood samples of approximate dimension 2 x 1 x 1 cm³ in distilled water a...
R J Murphy, D J Dickinson, P W McCormack, M K Lung
Effect of humidity and temperature on fastener withdrawal resistance from CCA and ACZA treated Douglas-fir
2000 - IRG/WP 00-20209
The effects of preservative treatment on fastener withdrawal was investigated in Douglas-fir lumber conditioned to two moisture regimes. In general, conditioning samples to 19% moisture content produced more substantial changes in withdrawal resistance of galvanized fasteners than did conditioning to 12%. Treatment had little or no effect on withdrawal resistance of stainless steel fasteners. With...
Sung-Mo Kang, J J Morrell
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