Abstract
This paper examines the relationship between physical, chemical and mechanical properties and desiccation of dredged sludge. The characteristics of the dredged sludge with high water content can be improved with various methods, i. e., solidification with stabilizer materials, mechanical dehydration, desiccation and heat stabilization. The consistency test, the pH test, the XRF analysis, the XRD test, the consolidation test, the permeability test and the fallcone test are herein carried out to identify the effect of the desiccation. The concluding remarks are as follows: 1) the liquid limit and compressibility of the sludge were dramatically reduced, while the permeability was increased with the desiccation; 2) the reduction rate of the compression indices of the original wet and desiccated materials was proportional with the ignition loss of the materials; 3) the desiccation of the dredged sludge reduces the amount of stabilizer required to obtain the specific strength.
