Document Type : Research Paper
Author
Caspian Ecosystem Research Institute Sari Agricultural and Natural Resources University
Abstract
In order to evaluate resistance of commercial wood species of alder and horn beech, logs were cut to lumbers. After caution of reduction moisture content, the lumbers were converted to special marine samples. The wood blocks were impregnated by CCA (Chrome- Cupper-Arsenic) and Betel method. Then treated and untreated wood samples were installed in one meter depth of water at seaside of Amirabad port, for 3, 6, 9 and 12 months. The result of observations showed that, the staining fungi and balanus were able to colonized surface of control samples. However, treated specimens were only occupied by balanus and with increasing time (3 to 12 months) balanus presence were major. The numerical result showed that untreated samples of alder were reduced in weight about 3.5% and treated samples not only had no weight losses but also increased in weight to12.21%. In the case of horn beech the result indicated that the weight loss of control was 2.7% and treated samples -7.9%. Also on surfaces of treated samples on both wood species were no sign of staining fungi. Finally could conclude the water of Caspian Sea is safe for using treated woods by many operations.
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