A Study on the Improvement of Cube-type Reef Using LCA Method

This study performed a Life-cycle assessment by process and material to identify and improve the environmental impact on the producing process of cube type reef. The producing process consists of a rebar assembly process, a steel formwork manufacturing process, a concrete pour process, and an artificial reef manufacturing process. And the MiLCA ver 2.3 program was used as the life-cycle assessment program. The environmental impact categories were global warming, resource consumption, acidification, photochemical oxidant, ozone depleting, eutrophication, ecotoxicity-quatic, and ecotoxicity-territorial impact categories, and a total of eight environmental impact categories were evaluated. As a result of inventory analysis, a total of 201 inventory items were derived, and as a result of impact evaluation, it was found that concrete pour process and rebar assembly process had a large environmental impact in 7 environmental impact categories excluding resource consumption. As a result of the life-cycle assessment by material, it was found that the potential environmental impact due to steel bar and concrete was the greatest in most environmental impact categories. The results of this study suggest that it is necessary to improve the concrete pour process and rebar assembly process in the artificial reef producing process, and to improve the materials used in the steel formwork manufacturing process.