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Title: Water Vapor Sorption Isotherms for Southern Pine Treated with Several Waterborne Preservatives

Source: ASTM Journal of Testing and Evaluation 38(4):521-525; 2010

Author(s)Zelinka, Samuel L.; Glass, Samuel V.

Publication Year: 2010  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4723-1

Abstract: Equilibrium moisture content (EMC) was measured over a range of relative humidities at 22.5°C to determine whether certain wood preservatives increase the hygroscopicity of southern pine (Pinus sp.) The treatments studied were alkaline copper quaternary (ACQ) at a retention of 6.6 kg•m-3, chromated copper arsenate (CCA) at 6.9 kg•m-3, and disodium octaborate tetrahydrate (DOT) at 3.8 kg•m-3 (equivalent to 2.6 kg•m-3 as B2O3). All treatments examined increased the EMC at relative humidities above 60 %.Wood treated with DOT was the most hygroscopic. At high relative humidities, the ratio of the EMC of ACQ-treated wood to CCA-treated wood was 1.08. It is unlikely that the higher corrosiveness of ACQ compared with CCA is due to this slight increase in hygroscopicity.

Keywords: Equilibrium moisture content (EMC); water vapor sorption; preservative treatments; chromated copper arsenate (CCA); alkaline copper quaternary (ACQ); borates; disodium octaborate tetrahydrate; corrosion; wood preservatives; moisture; wood moisture; humidity; adsorption; absorption; borates; fasteners; anti-corrosives; testing; southern pine; preservation; moisture content; chromated copper arsenate; alkaline copper quat; preservative treated wood; treated wood; DOT; hygroscopicity; water vapor; connectors

Publication Review Process: Formally Refereed

File size: 146 kb(s)

Date posted: 07/28/2010

This publication is also viewable on Treesearch:  view
RITS Product ID: 35617
Current FPL Scientists associated with this product (listed alphabetically)
Glass, Samuel V.
Research Physical Scientist
Zelinka, Samuel L.
Materials Research Engineer

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