2020 Volume 76 Issue 2 Pages I_612-I_617
For the effective use of dredged soil, we newly developed a large block-shaped artificial rock which is made by placing mixed slurry composed of soil, steelmaking slag and cement into the CAGE MAT directly and hardening it. Since the artificial rock uses a large amount of dredged soil of high water content, it is necessary not only to consider a quality control method applicable for changes in soil properties in mass production but also to check the existence of drying shrinkage cracks and the safety during lifting the block. Therefore, a field demonstration test was conducted and the flowability control was proposed where the flow value of the dredged soil was adjusted to be about 300mm by adding water to ensure workability during kneading the slurry. In addition, based on the load tests carried out on the full-scale size test pieces, the compressive strength was shown to be 0.81 N/mm2 required for lifting the block.
