Abstract: Abstract:Made use of polymer particles (PE,PS,PP) and phosphogypsum to blend,adopted the technology of hotpressing molding to manfacture architectural formwork.The density and water absorption,the heat expansion ration and cold shrink ration,the impact strength and the mumber of times of heating molding about the formwork were researched on the different formulation conditions.Result showed the density and solution rate of the formwork with the increase of fla ash dose enlarged.The heat expansion ration and cold shrink ration of the formwork with the increase of phosphogypsum dose minished. The impact strength of the formwork with the increase of phosphogypsum dose minished. When heating molding times less than five times,the impact strength of the formwork with the increase number of heating molding times enlarged. Then,the impact strength diminish when heating molding times were greater than five times. The diminish tendency of impact strength became mild.

Key words: polymer particles, phosphogypsum, architectural formwork