MOVING TO ENVIRONMENTALLY FRIENDLY WOOD PRESERVATIVES AND COATINGSLAURA REYES, Wood Engineering Department, Engineering Faculty, Universidad del Bìo-BìoFABIOLA ANDANA, Civil Engineering Department, Universidad de ConcepciónGRECIA AVILES, NATALIA JARA, TAMARA GONZALEZ, Building Engineering School, Universidad del Bìo-Bìo Forest Product Society 65th International Convention Portland, Oregon, june 21st
RESULTS Preservatives Penetration CCA BS( Cromazurol) (curcumin) CA-B (Cromazurol)
RESULTSCorrosionPreservative Weight difference Nail type solution (% w/w) Galvanized iron 1,20 CCA Steel 0,05 Cooper 0 Galvanized iron 1,41 CA-B Steel 0,07 Cooper 0 Galvanized iron na BS Steel na Cooper na
RESULTSTREATMENT COSTS Preservative Costs Retention (kg /m3 ) Total cost Preservative NCh 819 ($U/m3) Boronsilicate (BS) 50 kg. 2,14 Copperazole (CA-B) 17,67 kg. 2,27 CCA 6,67 kg. 1 Coating application costs Yield Total cost Revestimiento (m2/g/applic.) ($U/m2/ applic.)) varnish 0,015 1 stain 0,008 1,98 dye 0,010 2,62
RESULTS Treatment costs BASE -Volume; 1 m3 (320 boardS (½” x 4” x 2,4 m.) •Total surface: 180 m2 Coating Cost ($U /m2/application) Protection VARNISH STAIN DYE Product BS 1,43 1,28 1,22Preservative CA-B 1,49 1,3 1,24Cost (U$/m3) CCA 1 1 1
CONCLUSIONS- Boron silicates and copperazole lixiviates concentration are higher than CCA, but has less environmental impact according to thie composition- Stain showed the best performance compared to varnish and dye over copperazole or BS treated wood.
CONCLUSIONS- Preservation treatment costs are higher for Copperazole followed by Boronsilicates and cheaper for CCA.- Stain application costs less than traditional varnish, with lower environmental impact.- Combined treatment costs are similar for both Cooperazole and BS treated wood coated with stain.
ACKNOWLEDGEMENTSCHEMICAL SUPPLYARCHQUIMETAL S.A.PRESERVA S.A.UNIVERSIDAD DEL BÌO-BÌO•ACADEMIC VICE-RECTOR•RESEARCH DEVELOPMENTE AND INNOVATION DIRECTOR•ENGINEERING FACULTY DEAN•WOOD ENGINEERING DEPARTMENT HEAD & TECHNICAL STAFF