High-strength Antiwashout Underwater Concrete Containing the GGBF Slag

고로슬래그 미분말을 혼합한 고강도 수중불분리성 콘크리트

Recently, the antiwahout underwater concrete with an natiwashout admixture has been increasingly used for underwater structures. However, the credibility of antiwahout underwater concrete was brought up as problems because it was seldom applied to fields. In this study, experiments were made on the basic properties of antiwashout underwater concrete replaced with GGBF Slag from 40% to 60% to improve its properties. Resultant to the test, we got the results as follows; the difference of U-type heght was decreased, and the slump flow was increased. Whereas the amount of suspended solids became high as to increasing the replacement ratio of GGBF Slag, pH value became low. Beacause the ratio of compressive strengths (in water compared to in air) at 28days was obtained over 90%, its value is satisfied with 70% of a criterion.