Based on conventional stabilization,a new stabilization method was proposed to improve these wastes of dredged material and phosphogypsum to ideal fill materials.The dredged material and phosphogypsum were blended at the proper proportion firstly, then a little of cement been was added to stabilize the dredged material-phosphogypsum blend. Under some curing period,through the unconfined strength test, the direct shear test and the penetration test, the suitable blend ratios of two wastes, the strength and penetration properties of stabilization soil were obtained. The test results showed that the fittest blend ratios of two wastes is 1∶3.5~1.2∶1.The unconfined strength of stabilized phosphogypsum-dredged material blend is about 450~900 kPa with only the cement content of 100 kg/m3, and the permeability coefficientkis about 10-5~10-6cm/s.
