Pressure Treatment of Fresh and Ponded Heritiera mirror (Roxb.) Logs with Chromated Copper Arsenate (CCA)
G. N. M., Ilias and Abdullah, Faridah (2003) Pressure Treatment of Fresh and Ponded Heritiera mirror (Roxb.) Logs with Chromated Copper Arsenate (CCA). Pertanika Journal of Tropical Agricultural Science, 26 (2). pp. 89-92. ISSN 1511-3701
Sundri (Heritiera minor Roxb.) is a hardwood species which exhibits good strength qualities. They have potential for use as electric poles but their short service life posed a problem. This study examined whether treatment with the preservative Chromated Capper Arsenate (CCA) by full cell pressure method at 15.40 - 16.10 kg/cm2 for 8 hours could extend their service life. The samples tested were processed fresh and ponded H. minor logs of approximately 1 m length and 0.25 m diameter. Results showed that that the preservative treatment gave a mean penetration value of 23.84% log radius for fresh specimens and 32.29% for ponded logs, which were short of the standard requirement of 44% log radius penetration. The preservative retention of ponded logs was within the acceptable standard values of 20 kg/cm2of dry oxide basis, but that offresh logs did not meet the standard requirement. Thus, the full pressure treatment can extend the service life of H. minor to a certain extent in which ponded logs gave encouraging response to the preservative treatment.
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