Modification of fluorgypsum as cement retarder



The chemical composition and mineral structure of fluorgypsum as well as its harm to application in cement were elaborately analyzed. The primary fluorgypsum was modified and its applications in cement’s production were studied. The technological flow chart of preparing modified fluorgypsum was given. Experimental results indicate that hydration ratio the modified fluorgypsum through adding compound additive for 14d is about 70%. The modified fluorgypsum as cement retarder has certain stimulation to fly ash and increases the strength of compound cement. In addition, its adding amount is lower than that of natural gypsum. The modified fluorgypsum is a good substitute for natural gypsum.

Key words

fluorgypsum industry waste modification cement retarder 


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Copyright information

© Wuhan University of Technology and Springer-Verlag Berlin Heidelberg 2007

Authors and Affiliations

  1. 1.School of Materials Science and EngineeringWuhan University of TechnologyWuhanChina
  2. 2.Center of Material Research and AnalysisWuhan University of TechnologyWuhanChina

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