Reuse of construction waste for backfill material sorted by self-sedimentation

摘要

Increasingly, construction waste, such as high-water-content clay and sand slurry, is being mixed with cement for use as backfill material. The mechanical properties of such mixture depend highly on the grading characteristics of the soil particle. To ensure backfill material of sufficient strength, it is important to control the grading characteristics of construction waste. In this study, the self-sedimentation of construction waste mixed with water is used to obtain sand and clay materials sorted to the desired particle grading. An experimental study was carried out to understand the relationship between slurry density and mixing time.