Your search resulted in 1036 documents. Displaying 25 entries per page.
Effect of exposure site on metal migration from copper azole, alkaline copper quat or chromated copper arsenate treated southern pine decking
2015 - IRG/WP 15-50313
Metal migration from chromated copper arsenate, copper azole or alkaline copper quaternary compound treated southern pine lumber was assessed at sites in Mississippi and Oregon. Metal levels tended to be consistently higher in decks exposed in Mississippi. Rainfall characteristics did…
J J Morrell, H M Barnes
Alkaline copper treated wood for use in residential decking
2008 - IRG/WP 08-30490
Alkaline copper quaternary ammonium compound (ACQ) treated decking was exposed in a field experiment and the mobile copper assessed based on that collected in the leachate. The amount of copper which leached was modeled after 4 years. The results showed that…
J N R Ruddick
Corrosion of fastener and connector in contact with alkaline copper treated wood – it is a problem
2008 - IRG/WP 08-40437
For many decades, chromated copper arsenate (CCA) was the most common wood preservative used in North America for residential and industrial applications. Since December 31, 2003, the use of CCA for residential application was voluntarily terminated. One of the most widely accepted…
J N R Ruddick
The effect of additives on copper losses from alkaline copper treated wood
2007 - IRG/WP 07-50246
The replacement of chromated copper arsenate (CCA) by alkaline copper compounds has heightened awareness of the potential impact of copper losses on aquatic organisms. While there remains a healthy debate concerning the actual risk of copper leaching from wood preservatives into aquatic…
J Mitsuhashi, J J Morrell, L Jin, A F Preston
Comparison of copper leaching from alkaline copper quat and copper compound nanosol-based wood preservative treated wood
2024 - IRG/WP 24-20726
To improve the leaching resistance of copper ion-based wood preservatives, copper compound nanosol-based wood preservatives were developed and its copper leaching characteristics were evaluated. Three types of preservatives (DC1, DC2, DC3) were prepared with different crystallinity and dispersant…
Y-S Choi, S-M Yoon, J O Kim, J-G Kang, J-G Park
A comparison of the chemistry of alkaline copper and micronized copper treated wood
2010 - IRG/WP 10-30528
This paper discusses the chemistry of the reaction of alkaline copper and micronized copper with wood. The objective of this study is to examine the copper species produced in wood during the fixation reaction using electron paramagnetic resonance (EPR) spectroscopy. The initial experiments (phases 1 to 2) were…
Wei Xue, P Kennepohl, J N R Ruddick
A comparison of the corrosion of alkaline copper and micronized copper treated wood
2010 - IRG/WP 10-40515
With the replacement of chromate copper arsenate (CCA) by alkaline copper wood preservatives, there have been reports of increasing corrosion of metal fasteners and connectors in contact with treated wood. This may be explained by the presence of more mobile copper in the treated wood. One…
M Kofoed, J N R Ruddick
Copper to quat ratio in alkaline copper quat (ACQ) wood preservative - Effects on fixation and leaching of preservative components in red pine
2009 - IRG/WP 09-30496
…investigates the effect of the relative proportion of copper oxide (CuO) to didecy dimethyl ammonium carbonate (DDACb) in an alkaline copper quat (ACQ) formulation on the rate of copper fixation or stabilization and the resistance of treated wood to leaching of copper and quat (DDACb). Red pine samples were…
S Pankras, P A Cooper, T Ung, L Awoyemi
Effects of sodium hypochlorite on compression strength and copper retention of spruce wood treated with copper azole and alkaline copper quat
2007 - IRG/WP 07-40362
…of sodium hypochlorite on compression strength values and copper retention ratios of refractory spruce wood (Picea oriental L.) treated with the waterborne preservative Copper Azole, (CBA-A, Tanalith-E 3492) and alkaline copper quat (ACQ-2200). Before the copper azole and alkaline copper quat treatment, the samples…
S Yildiz, E Dizman, A Temiz, Ü C Yildiz
Effect of alkaline phenolic resin adhesive on the stability of preservatives incorporated into the glue-line of plywood
1991 - IRG/WP 3650
Stability of preservatives was determined by gaschromatographic analysis when they were applied to glue-line treatment of plywoods. Among organophosphorous insecticides, emulsified forms of chlorpyrifos, dichlofention and diazinon were more stable than others.…
S Fushiki, Y Katuzawa
Alkaline building materials and controlled moisture conditions as causes for dry rot Serpula lacrymans growing only in houses
1985 - IRG/WP 1272
…reached outdoors. At the same time the close presence of alkaline building materials, such as mortar, a clay layer, plaster or concrete has been observed in all instances, the average distance being from 0-100 cm. By neutralizing the dry rot fungus large production of oxalic acid the alkaline materials are able to…
J Bech-Andersen
Hot and cold treatment with ACQ
2025 - IRG/WP 25-20747
…the potential of the hot and cold bath process using alkaline copper quaternary compound (ACQ) on end-sealed slash pine (Pinus elliottii) sapwood samples. Samples were heated in water at 95 °C for either one or two hours, then immersed in room temperature ACQ. Results demonstrated full penetration of the…
J Norton
Virtual reality of wood protection
2024 - IRG/WP 24-20727
…Southern pine (Pinus spp.) treated with either micronized copper azole (MCA) or alkaline copper quaternary (ACQ) preservative, and a wood-plastic composite containing zinc borate as a biocide and a fire retardant. Students used VR to explore the distribution of silica in turpentine and copper in ACQ and MCA-treated…
D Feng, Y Liu, M Turner, A Limaye, P D Evans
Copper migration from preservative-treated Douglas-fir decking: models vs laboratory leaching data
2024 - IRG/WP 24-50390
The ability of a model to predict copper migration from Douglas-fir treated with organic metallic substances into a freshwater slough was evaluated against data generated through simulated overhead leaching. The model predicted very high loadings of ammoniacal copper zinc arsenate, alkaline…
M J Konkler, G Presley, J J Morrell, T Singh
Virtual Reality of Wood Protection
2023 - IRG/WP 23-20698
…a micronized water-borne wood preservative or an ionic alkaline copper quaternary preservative. Students were surveyed to assess their views on the system as a learning tool. The results showed that students were very positive about the VR system, and they frequently commented that the system was better than…
D Feng, Y Liu, M Turner, A Limaye, P D Evans
Non-vacuum/pressure ACQ treatment
2023 - IRG/WP 23-40971
…for using the hot/cold bath process was explored using alkaline copper quaternary compound (ACQ) on end-sealed slash pine (Pinus elliottii) sapwood samples. Samples heated for 1 or 2 hours at 95°C in water, and then immersed in room temperature ACQ were fully penetrated indicating the value of this process in…
J Norton
Overview of the treated wood quality control program in the United States with the recent challenges and advances
2017 - IRG/WP 17-20616
…heavy duty metal oxide based products such as chromated copper arsenate (CCA). The successor generation of wood protection systems usually contain copper as the primary biocide, in combination with carbon-based co-biocides such as quaternary ammonium compounds (Quat), and/or triazoles (Tebuconazole and/or…
L Jin
In-service performance of treated plywood bridge decks in Australia
2017 - IRG/WP 17-40794
…The panels had been manufactured using either; copper chrome arsenic (CCA) preservative in an envelope treatment process or an alkaline copper quaternary (ACQ) preservative in a veneer treatment process. The in-service performance of both types of panels is discussed in relation to results from…
M A Powell
Estimation of wood degradation determined by visual inspection, mechanical testing and DNA characterisation – report after 3 years of exposure
2016 - IRG/WP 16-30700
…of two separate treatments, thermal modification and alkaline copper quaternary (ACQ, Silvanolin©) treatment, on fungal decay, visual disfigurement, deterioration in mechanical properties and fungal community structure was assessed on Norway spruce (Picea abies) and compared with the performance of two…
N Thaler, T Martinović, M Bajc, D Finžgar, H Kraigher, A Sinha, J J Morrell, M Humar
Three-year field test of preservative-treated Canadian species in Korea
2014 - IRG/WP 14-30646
…and white spruce were incised and pressure-treated with alkaline copper quaternary (ACQ) or copper azole (CA), based on the Canadian CSA O80 Series-08 standards. End-matched material for ground contact exposure only was also installed in September 2011 at a field test site in Canada. After three years of exposure…
Jieying Wang, Jong Bum Ra, P I Morris
Developing Analytical Methods for Determination of Quaternary Ammonium Compounds (DDAC) using HPLC and HPLC-MS (Application to treating solution and preservatives treated wood)
2013 - IRG/WP 13-20516
Korea preservative treating industry has mainly used alkaline copper quaternary (ACQ) expected over 80% of market share in Korea. ACQ employs dodecyl dimethyl ammonium chloride (DDAC) and benzyl dimethyl dodecyl ammonium chloride (DBAC) for active ingredient along with copper. The strongly increasing domestic…
Sung-Mo Kang, Kwon-Min Kim, Won-Mo Koo, Myeong-Won Cho
Conclusions and Summary Report on an Environmental Life Cycle Assessment of ACQ-Treated Lumber Decking with Comparisons to Wood Plastic Composite Decking
2013 - IRG/WP 13-50295
…with the national production, use, and disposition of ACQ (alkaline copper quaternary)-treated lumber decking and wood plastic composite decking using life cycle assessment (LCA) methodologies and following ISO 14044 standards. The results for treated wood decking are significant.
• Less Energy & Resource…
AquAeTer, Inc.
Relationship between coating properties and their performance on treated wooden decks
2008 - IRG/WP 08-30454
…of a range of semi-transparent stains on chromated copper arsenate (CCA), alkaline copper quaternary (ACQ) and copper azole (CA) treated Southern pine wood was monitored over 18 months of natural weathering in Toronto, Canada. Additionally, the samples were tested under accelerated weathering conditions over…
M Ahmadinejad, P A Cooper
Disposal of Pressure Treated Wood in Construction and Demolition Debris Landfill
2005 - IRG/WP 05-50235
…concentrations of Cu. Cu-based preservatives such as alkaline copper quaternary (ACQ) also show minimal copper leaching, suggesting that disposal of Cu-based wood preservatives posees minimal impact to groundwater from Cu leaching.
T G Townsend, B Dubey, J Jambeck, H M Solo-Gabriele
Diffusion modeling of inorganic wood preservative leaching in service
2005 - IRG/WP 05-50224-5
…ambient temperature. Laboratory determined parameters for alkaline copper quaternary (ACQ), copper azole (CA), chromated copper arsenate (CCA) and borate (DOT) wood preservatives are used to predict leaching rates from larger lumber samples. Preliminary comparisons of predicted leaching with measured leaching of…
L Waldron, P A Cooper, Y T Ung