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by jbfenton
Mon Feb 01, 2016 11:52 pm
Forum: Concreting, Drives, Paths and Patios Forum
Topic: Adding Old Lumps of Plaster to Concrete Mix?
Replies: 0
Views: 2687

Adding Old Lumps of Plaster to Concrete Mix?

Hello, I would like to know if anybody knows whether using old plaster (knocked off the walls of my victorian built walls and ceilings) would adding this into a cement mixer with ballast and cement do any harm?? Is there another chemical reaction that would happen and weaken it or would it effective...
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