Authors:Beraldo, A.L; Ferreira, C.S.G
Abstract:Salt solutions, such as CCA (chromium-copper-arsenic) or CCB (chromium-copper-boron) are the pdncipal chemical products employed to enhance durability of bamboos against decay, borer and termite attack. The effectiveness of these treatments was evaluated by means of the total amount of chemical products retained in bamboo culm. Strips from Bambusa tuldoides were soaked in CCB solutions (31.75% Cr, 13% Cu and 5.25% B) with 10 per cent concentration. Influence ofthe elapsed time between strips cutting and soaking was evaluated. Chemical products traceability was performed by scanning electron microscope (SEM). Results obtained confirm a non-uniform distribution of chromium and copper oxides along the bamboo anatomical elements.
Keywords:bamboos; chromium; copper chrome arsenates; durability; internodes; spatial distribution; stems; vessels; wood preservatives.