Cement-based solidification of dredged sludge

Important volume of contaminated or partially contaminated dredged sludges is devoted to disposal at sea or landfarms. The reuse of dredged sludges as building material obtained by solidification/stabilisation techniques constitutes a new way to do. These techniques improve the physical and mechanical properties of the dredged sludges and check the pollution migration. The paper is concerning the solidification of the dredged sludge by cements. Three main parameters are taking into account namely: the cement contents from 5 to 60 % (linked of the wet density of sludge), the type of cements (standard references are CPA, CPA-PM and CPJ) and cure conditions (in air, in mould and in water). The parameters influence is studied by physical and mechanical indicators such as compressive strength, water content after solidification and porosity.