EFFECTIVENESS OF COPPER-CHROME-BORON AS WOOD PRESERVATIVE

Abstract

Kempas (Koompassia malaccensis) and meranti tembaga (Shorea leprosula) samples of two different sizes were treated with CCB and exposed at two test sites. CCA (6%) was used as a reference preservative. A visual on-site assessment of decay on every test stake was made every three months for two years and every six months for each of the following years. The amount of preservative retained in the treated wood was determined by chemical analysis after 6 and 12 months exposure at the test site. The relationships between type of preservative, preservative concentration, test site and wood species were statistically determined. CCB preservative at the recommended concentration gave about the same degree of protection as CCA in ground contact.