Abstract
In order to investigate the applicability of phosphogypsum in the ternary system Portland cement-Slag-Phosphogypsum, different treatment methods and dosages of phosphogypsum were studied. The results show that phosphogypsum can be used to prepare supersulphated cement. Phosphogypsum treated with 500°C will reduce the water absorption and softening coefficient. But the compressive strength is lower than other two treatment methods. The best addition of anhydrous phosphogypsum is 10-30% in the ternary system Portland cement-Slag- Phosphogypsum.
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