Hydration of Active-Belite Cement with Gypsum and Slag

석고와 슬래그를 첨가한 Active-Belite Cement의 수화특성

  • Published : 1998.04.01

Abstract

Active belite cement clinkers were synthsized by using natural raw materials with borax and calcium phosphate ({{{{ {Ca }_{3 }( {PO}_{4}) }}2) In both case {{{{alpha ^、 {C }_{2 }S }} were formed but borax was more efficient. The cement syn-thesized with the addition of borax was hydrated with the addition of anhydrite(5 wt%) and slag(30wt%, 40wt% 50wt%) The addition of 50wt% slag with anhydrite was good for strength development in 7days and the compressive strength was developed to twice than no addition of slag at 28 days strength.

미량성분 첨가에 의한 클링커내 고온형의 C2S상의 합성과 혼합재에 의한 수화 활성도의 증진을 시도하였다. 미량성분으로 첨가한 borax와 Ca3(PO4)2의 경우 모두 고온형을 합성하였으나, borax의 경우가 더 효과적이었다. 즉 borax의 경우 1.5~3 wt%의 첨가로 고온형의 α-C2S의 합성을 용이하게 하였다. borax를 첨가하여 합성한 클링커를 분쇄하고, 무수 석고 (5wt%) 와 슬래그 (30 wt%, 40 wt%, 50 wt%)를 첨가하여 수화시켰다. 무수 석고와 50%슬래그 첨가시 수화활성도 증진은 수화 1일에는 별 효과를 보이지 않았으나, 7일 이후 강도 발현이 좋았으며, 압축강도는 슬래그를 첨가하지 않은 경우보다 28일 강도에서 약 2배의 증진을 나타내었다.

Keywords

References

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