Durability of Pinus taeda L. wood, impregnated with chromated copper arsenate to the xylophagaus fungi action. Misiones, Argentina.

Abstract

The objective of this work was to study the behavior of Pinus taeda L. wood without and with impregnation with retentions of 5, 10 and 15 kg/m³ of chromated copper arsenate, type C, preservative against Pycnoporus sanguineus, Laetiporus sulphureus, Plerotus sajor caju, Ganoderma applanatum, Glophyllum sp. in laboratory conditions. The wood was obtained from six trees chosen at random, and impregnated with C.C.A. in laboratory autoclave. To determine the efficiency of preservative 5 samples were used 5 samples of 3x 1 x 0,5 cm of no treated wood, were used. The wood samples were sterilized and put on a xylophagaus fungi staying in oven at 28°C for 12 weeks; after this period, the samples were taken away and put on a laboratory environment, until the moisture content of the beginning of the experiment was attained. The degradation was evaluated through the weight loss. The Pinus taeda L. wood was moderately resistant with retentions of 5 and 10 kg/m³ of CCA, therefore retention of 5 kg/m³ is enough.