This paper describes a study on design, management and construction method for dredged soil improvement with converter steel-making slag. After a continuously mixing and damping system was introduced, several tests in laboratory and field experiments were executed. It is found that the density measurement of mixture is available for quality control to keep mixture ratio and a uniform mixture was supplied by the introduced method. In addition, the effectiveness of mixture, decrease of suspended solids under construction, increase of the strength of mixture in situ and little increase of pH just above the constructed mixture mound were confirmed.
