Abstract
LCA was applied to the wooden bridges constructed by creosote- and CCA-impregnated wood. Results were compared with those of concrete and steel bridges, and environmental performance of preservative-treated wood was discussed. Conclusions obtained in the current assessment are as follows: 1) Wooden bridges (creosote and CCA) are most advantageous scenarios for climate change, photo-oxidant formation, acidification, and eutrophication. However, wooden bridge (CCA) is disadvantageous scenario for human toxicity and ecotoxicity; 2) Main reason of disadvantage of wooden bridge (CCA) is the discharges of As, Cr, and Cu to the environment in service and when CCA-impregnated wood is incinerated; 3) Effective reduction in toxic impacts of CCA-impregnated wood can be achieved by collection of CCA components at the incineration site.
