Abstract: Waste plastics/phosphogypsum compound formwork was prepared via melt blending and hot-pressing molding. The effect of pressing temperature and holding time on the mechanical property and macroscopic morphology of the compound formwork were discussed. It showed that the best pressing temperature and holding time were 240 ℃ and 40 min, respectively. The static bending strength, elasticity modulus, and impact strength of thus obtained compound formwork were 50.6 MPa, 4.5 GPa, and 50.6 kJ/m2, respectively. The macroscopic morphology was dense, even-textured.

Key words: waste plastics, phosphogypsum, compound formwork, heat temperature, preserve heat time