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The influence of soluble sodium, magnesium and chlorine ions on hydration process, hardening and morphology of FGD plaster were studied by external addition. The results showed that these impurities short the setting time of FGD gypsum, therein, the sodium has an obvious effect on the shortening the setting time. Under the low concentrations for sodium and chlorine, the morphology of FGD gypsum hydration...
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