STUDY ON GRANULATED BLAST FURNACE SLAG APPLYING TO THE GROUND IMPROVEMENT

Abstract

For using the granulated blast furnace slag (GBF-slag) as an alternative material to marine sand which has been so far used in the ground improvement, the changes of physical properties and permeability of GBF-slag that result from latent hydraulic properties were examined. As a result, it was clarified that the GBF-slag, when used to the sand column without the compaction in the ground improvement method, has characteristics similar to the marine sand column which is installed as the Sand Compaction Pile (SCP) method. Here a design procedure of low replacement SCP method using GBF-slag is proposed and it's validity is confirmed by the newly developed sand-clay composite pile test apparatus.