Study on fluidity and strength of dredged sludge under water curing condition

Abstract Dredged sludge can be used in engineering by treating with flowing solidification method underwater, but the flow solidification characteristics of dredged sludge in underwater curing condition are not clear. The influence of initial water content, cement content and curing age on the fluidity and strength of solidified sludge was discussed through laboratory tests. The results show that the strength of solidified sludge under water curing situation increase linearly with cement content, decreases linearly with the initial water content, and increases logarithmically with the curing age. The relationship of unconfined compressive strength with liquid limit and initial water content for dredged sludge at 28 days curing age was proposed and verified, which provides an important basis for field application and strength prediction of flow solidification treatment.