In the metro area, cheap and high quality ground improving material for backfilling is in shortage and development of its alternative is required. On the other hand, volume reduction, harmlessness and recycling of municipal solid waste (MSW) becomes necessary due to present MSW dumping sites are almost beyond their capacity. In these situations, we studied, through chemical, physical and mechanical testing, the applicability of MSW direct melting slag as ground improving material which is produced from “direct melting, recycling system” developed by us. As a result, we confirmed that the MSW direct melting slag cleared the standard of ground improving material with excellent applicability. The ground improving method stands for Sand Compaction Pile Method and Sand Drain Method in this report.
