Effect of phosphatic and fluoride impurities of phosphogypsum on the properties of selenite plaster

Summary

The effect of phosphatic and fluoride impurities present in waste phosphogypsum on the setting time, strength development and morphology of selenite gypsum plaster was studied. It was shown that soluble phosphates retard the setting and strength development of plaster while soluble fluorides decrease the setting time and reduce the density and strength. The formation of prismatic, rhombic and lathlike crystals retards the normal setting and strength development of selenite gypsum plaster. 16 refs.

Primary author(s): Singh M

Source: Cem.Concr.Res.

             33,No.9,2003,p.1363-1369

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