| 摘要 |
The present invention relates to a lightweight fill material for preventing formation of a sinkhole for backfilling an underground structure buried underground, and more preferably, to a lightweight fill material for preventing formation of a sinkhole, which can prevent a sinkhole from being formed due to occurrence of differential settlement caused by poor compaction of fill material into a sewer pipe, which is an underground structure, and a cavity generated around the sewer pipe. The present invention relates to a lightweight fill material for preventing formation of a sinkhole for backfilling an underground structure buried underground, wherein the fill material comprises a binder, water, and recycled soil, wherein the binder is composed of 20-30 wt% of cement, 10-20 wt% of fly ash, and 50-70 wt% of blast furnace slag. |
