crush and drywall or plasterboard,
How to Pulverize Set Plaster for Re-use: 6 Steps (with Pictures)
To save yourself a few dollars, you can re-use old plaster molds to make fresh plaster powder. . Dig for whatever you can use to wrap the old plaster chunks and prevent the . Landfill sites refuse drywall and plaster because as it decomposes, . So, re-use it by crushing it and reheating it in a 325 degree F oven overnight,.