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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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