Adding some slag, fly ash, phosphogypsum and other materials into the roadbed materials can improve thevarious properties of the roadbed materials. In this paper, the basic properties of phosphogypsum roadbed materials aresystematically studied by directly mixing phosphogypsum into the mortar mixing process to prepare cement-basedroadbed materials. The results show that with the increase of phosphogypsum content, the basic compressive strengthof the material is not damaged, which conforms to the design specifications of highway roadbed;the water absorption ofthe material is significantly impro...
