2021 Volume 77 Issue 2 Pages I_463-I_468
The strength developments of dredged soil mixed with converter steelmaking slag and steel slag mixed clayey soils are uneven, and many factors of strength development are unclear. Therefore, in this study, the shear strength development of clayey soil mixed with steelmaking slag was investigated by examining the physical and chemical factors of clayey soil or steelmaking slag that affected the shear strength development by solidification of the mixed soil. As a result, it was found that the type of clayey soil affected more on the development of shear strength by solidification than the effect of the particle size distribution of steelmaking slag and the amount of free lime, when the maximum particle size of steelmaking slag was 4.75 mm, the fine fraction content of steelmaking slag was 0 to 30 %, and the amount of free lime in steelmaking slag was more than 3.5 %. Specifically, it was suggested that the amorphous silica content and the compositional ratio of amorphous silica in the clay affected the shear strength and the tendency of shear strength development.
