Three-year field test of preservative-treated Canadian species in Korea
Jieying Wang, Jong Bum Ra, P I Morris
The purpose of this study was to generate field performance data in Korea on Canadian softwood species preservative-treated to Canadian standards. Two field tests of preservative-treated Canadian softwood species, one in ground contact and one above ground, were installed in Jinju, Korea in November 2010. Western hemlock 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 in Korea and two years in Canada, no decay was found in preservative-treated samples at either test site, while in untreated material decay, and particularly termite attack in Korea, were well advanced.
Keywords: preservative-treated softwood species, western hemlock, white spruce, alkaline copper quaternary (ACQ), copper azole (CA), ground contact test, above-ground test