The use of a cement-bentonite cut-off wall to contain possible pollutants from a landfill containing highly polluted dredging spoils

Abstract

The dredging spoil from the sea canal at Ghent in Belgium has been landfilled at a specially engineered site at Zelzate. In order to prevent the spread of pollutants from the site to the surroundings a cement-bentonite screen has been constructed down to a thick clay layer 25 m under the surface. Calculations show that this barrier is adequate for the environmental objectives stipulated.