Abstract
The fundamental and the mechanical characteristics of the dredged sludge cakes are investigated to reuse the cakes. As an experimental material, the dredged sludge cakes of Kojima Lake in Okayama are used here. Considering the case the sludge cakes are used as an embankment material, the compaction effect of the cakes on the permeability and the compressibility is clarified. Then, since there is the possibility that the dredged sludge is used with the dry state, the effect of the desiccation on the physical and mechanical properties is investigated here. According to the results, the compaction of sludge cakes makes the permeability reduce effectively, and the desiccation dramatically increases the permeability. Furthermore, the unconfined compression strengths of the sludge stabilized with cement are compared. The functional relationship is recognized between the water content and the unconfined compression strength. In comparison between the specimens made from wet and desiccated sludges, higher strength is obtained from the latter one.
