Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Influences of Chlorides on the Whiteness in White Portland Cement

백시멘트의 백색도에 미치는 염화물의 영향

  • Published : 1976.06.01
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Abstract

Influences of chlorides(CaCl2, MgCl2, NaCl) on the colouring effect of Fe component in white portland cement was investigated. Chlorides enhance the whiteness of the white portland cement owing to volatilization of Fe2O3 and translation of ferrite composition toward C2F. This translation is caused by consumption of alumina at the formation of C12A7, the formation of which is promoted in the presence of chloride. With decrease of p in ferrite composition C6F1-pAp, transfer of Fe3+ from 4 to 6 coordinated cite is occurred, and as a result, whiteness is raised. Hydration process of the cement containing a small amount of chloride differs little from the one without chloride.

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References

  1. J. Appl. Chem. USSR v.42 no.5 Influence of the Methods of Introducing Calcium Chloride into Cement RawMix on Clinker Whiteness A.N. Grachyan;A.P. Kalashnikov;Yu. I. Mondrykin
  2. J. Appl. Chem. USSR v.45 no.2 Electron Paramagnetic Resonance Study of the Structure of the Ironcnotaing Components of Cement Clinkors Burned with Added Chlorides A.N. Grachyan;A.P. Zubekhin;Yu. I. Mandrykin;N.V. Rotych
  3. 6th Int. Cong. Chem. Cement The Chemistry of White and Coloured Cements I. Teorcanu
  4. 5th Int. Symp. Chem. Cement v.1 Analysis of Portland Cement Clinker G. Yamaguchi;S. Takai
  5. 日本시멘트技術年報 XXVI 젯트시멘트 클린커중의 칼슘플로로 알루미네이트相 및 훼라이트相에 대하여 山口;內川;高木;槻山
  6. Trans. Brit. Ceram. Soc. v.64 no.2 The Forrite Phase in Cements A.J. Majumdar
  7. Acta Cryst v.12 Structure of Dicalcium Forrite and Brownmillerite E.F. Bertaut;P. Blum;A. Sagnieres
  8. Acta Cryst. v.15 Crystallographic Changes with the Substirution of Aluminium for Iron in Dicalcium Ferrite D.K. Smith