Pressure treatment of fresh and ponded Heritiera minor (Roxb.) logs with Chromated Copper Arsenate (CCA)

G.N.M. Ilias; Faridah Abdullah

Pressure treatment of fresh and ponded Heritiera minor (Roxb.) logs with Chromated Copper Arsenate (CCA)

2003

G.N.M. Ilias | Faridah Abdullah

Sundri (Heritiera minor Roxb.) is a hardwood species which exhibits good strength qualities. They havepotential for use as electric poles but their short service life posed a problem. This study examined whether treatmentwith the preservative Chromated Capper Arsenate (CCA) by full cell pressure method at 15.40 - 16.10 kg/cm2for 8 hours could extend their service life. The samples tested were processed fresh and ponded H. minor logs ofapproximately 1 m length and 0.25 m diameter. Results showed that that the preservative treatment gave a meanpenetration value of 23.84% log radius for fresh specimens and 32.29% for ponded logs, which were short ofthe standard requirement of 44% log radius penetration. The preservative retention of ponded logs was withinthe acceptable standard values of 20 kg/cm2of dry oxide basis, but that of fresh logs did not meet the standardrequirement. Thus, the full pressure treatment can extend the service life of H. minor to a certain extent in whichponded logs gave encouraging response to the preservative treatment.

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