Abstract: The present invention provides a seawater resistant grout material composition and a method for constructing an offshore wind turbine structure using the same, the seawater resistant grout material composition comprising: 2˜10 wt % of high strength admixture; 25˜35 wt % of type I Portland cement; 30˜45 wt % of silica sand having a particle size of 30˜60 mesh; 5˜15 wt % of silica sand having a particle size of 60˜100 mesh; and 5˜10 wt % of silica sand having a particle size of 100˜200 mesh, wherein the high strength admixture is obtained by mixing and pulverizing 45˜99 wt % of slag and 1˜55 wt % of anhydrite, thus the present invention has excellent seawater resistance, excellent strength development characteristics at a low temperature, and increased compressive strength and durability to allow withstanding cyclic loads due to wind and wave pressure.

Abstract: The present invention provides a seawater resistant grout material composition and a method for constructing an offshore wind turbine structure using the same, the seawater resistant grout material composition comprising: 2˜10 wt % of high strength admixture; 25˜35 wt % of type I Portland cement; 30˜45 wt % of silica sand having a particle size of 30˜60 mesh; 5˜15 wt % of silica sand having a particle size of 60˜100 mesh; and 5˜10 wt % of silica sand having a particle size of 100˜200 mesh, wherein the high strength admixture is obtained by mixing and pulverizing 45˜99 wt % of slag and 1˜55 wt % of anhydrite, thus the present invention has excellent seawater resistance, excellent strength development characteristics at a low temperature, and increased compressive strength and durability to allow withstanding cyclic loads due to wind and wave pressure.