Influences of Cooling Atmosphere on the Whiteness in White Portland Cement

백 시멘트의 백색도에 미치는 냉각분위기의 영향

  • 한기성 ;
  • 최상흘
  • Published : 1978.02.01

Abstract

Influence of cooling atmosphere on the whiteness in white portland cement was studied. The effective composition of gaseous medium of cooling atmosphere is desirable less than 0.5% of $O_2$ and 0.5~1.5% of CO. When theclinker is quenched in nitrogen atmosphere, the color of clinker becomes bright pink. In a weakly reducing gaseous medium or vacuum, the absence of oxygen brings defects in crystal and transformation in the coordination of iron, and as a result, whiteness is raised.

Keywords

References

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