Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Effect of Sodium Gluconate on the Hydration of Tricalcium Aluminate(II) Early Hydration Behavior

3CaO.$Al_2O_3$의 수화반응에 미치는 글루콘산 나트륨의 영향(II) 초기 수화 거동

  • 김창은 (연세대학교 공과대학 요업공학과) ;
  • 이승헌 (연세대학교 공과대학 요업공학과)
  • Published : 1986.06.01
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Abstract

The hydration of $C_3A$ and $C_3A-CaSO_4$.$2H_2O$ was investigated with varying concentration (0.1-1.0%) of sodium gluconate solution. gluconate solution. Sodium gluconate accelerates cation dissolution from $C_3A$ for the first several minutes but depresses the rate of heat evolution in the course of $C_3A$ hydration. The hydration of $C_3A$ in the presence of sodium gluconate was modified such that the formation of the intermediate hydrate C4AH$\chi$ crystal was much reduced and most of the product became amorphous. The retardation of $C_3A-CaSO_4$.$2H_2O$ hydration in the presence of sodium gluconate was controlled by the competitive adsorption between gluconate anion and $SO_4^{-2}$ onto $C_3A$ surface.

Keywords

References

  1. Proc. 4th Intern. Symp. Chemistry of Cements, Washington v.Ⅰ The System CaO-Al₂O₃-H₂O at 25˚C F.E.Jones
  2. Proc. 5th Intern. Symp. Chemistry of Cements, Tokyo v.Ⅱ Hydration of Tricalcium Aluminate H.E. Schwiete;U. Ludig
  3. J. Amer. Ceram. Soc v.59 no.5 Character of Hydration of 3CaO·Al₂O₃ R.F. Feldman;V.S. Ramachandran
  4. Advances in Cement Technology S.N. Ghosh
  5. Cem. Concr. Res v.7 no.3 Gas Phase and Liquid Phase Hydration of C₃A E. Breval
  6. J. Appl. Chem v.13 no.5 Mechanism of Hydration of 3CaO·Al₂O₃ H.N. Stein
  7. Proc. 7th Intern. Congr. Chemistry of Cements, Paris v.Ⅰ Mechanisms of Portland Cement Hydration J. Skalny;J.F. Young
  8. Cem. Concr. Res. v.3 no.6 Hydration Reactions in Pastes C₃S-C₃A-CaSO₄·2H₂O-H₂O at 25˚C W.A. Corstanje;H.N. Stein;J.M. Stevels
  9. J. Amer. Ceram. Soc. v.53 no.2 Effect of Organic Compounds on the Interconversions of Calcium Aluminate Hydrates: Hydration of Tricalcium Aluminate J.F. Young
  10. Proc. 15th Nat. Cont. on Clay and Clay Mine. Interlamellar Reactions of Tetracalcium Aluminate Hydrates with Water and Organic Compounds W. Dosch
  11. J. Kor. Ceram. Soc. v.23 no.2 Effect of Sodium Gluconate on the Hydration of 3CaO·Al₂O₃(Ⅰ) CE Kim;S.H. Lee;J.H. Choy
  12. J. Amer. Ceram. Soc v.60 no.3 Retardation of Tricalcium Aluminate Hydration by Sulfates J. Skalny;M.E. Tadros
  13. 日本化學會誌 no.9 ?セッコゥの水和におよほす ケトカルボン酸類の作用 笠井順一;露木尙光