Journal of Wuhan University of Technology-Mater. Sci. Ed.

, Volume 22, Issue 4, pp 745-748

First online:

Modification of fluorgypsum as cement retarder

  • Wang Jinhua Affiliated withSchool of Materials Science and Engineering, Wuhan University of Technology Email author 
  • , Yang Xinya Affiliated withCenter of Material Research and Analysis, Wuhan University of Technology
  • , Yu Degao Affiliated withSchool of Materials Science and Engineering, Wuhan University of Technology

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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