Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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Effect of Chlorine Content in Clinker on Setting and Compressive Strength of Early Strength Cement

클링커 염소 함량이 조강형 시멘트의 응결 및 압축강도에 미치는 영향

  • 최재원 (아세아시멘트 기술연구소) ;
  • 유병노 (아세아시멘트 기술연구소) ;
  • 서동균 (아세아시멘트 기술연구소) ;
  • 김경석 (아세아시멘트 기술연구소) ;
  • 한민철 (청주대학교 건축공학과)
  • Received : 2023.07.19
  • Accepted : 2023.08.03
  • Published : 2023.09.30
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Abstract

In this study, we examine the feasibility of using chlorine in clinker as an early-strength cement by the effect of accelerating the cement hydration reaction of chlorine. Clinker with a chlorine content of 200-1,000 ppm was prepared using actual cement kilns, and 46 cement samples were prepared by adding gypsum and admixtures(GGBFs and limestone). We measured consistency, setting, 1-28 days compressive strength and analyzed them statistically. Test results indicated that an increase of the chlorine content resulted in shortening of initial and final setting time and the improvement of 1 day compressive strength. But the 28 days compressive strength was decreased. Specifically, when the chlorine content was increased from 230 to 965 ppm, the 1 day compressive strength increased up to 4.6 MPa, improvement effect was superior to that of increasing Blaine in the range of 3,400-3,970 cm2/g.

본 연구에서는 염소 성분의 시멘트 수화반응 촉진 효과를 이용하여 염소 함량을 증가시킨 클링커의 조강형 시멘트로서의 활용 가능성을 평가하였다. 실제 시멘트 제조설비를 이용해 염소 성분 200-1,000 ppm 수준의 클링커를 제조하고, 여기에 석고 및 혼합재를 첨가하여 46개의 시멘트 시료를 제조하여 이의 표준주도 및 응결, 압축강도를 측정해 통계 분석하였다. 시험 결과, 염소 함량 증가에 따라 응결이 단축되고, 1일 압축강도가 향상되었지만, 28일 압축강도는 하락하였다. 특히 염소 함량을 230에서 965 ppm으로 증가시킬 경우 1일 압축강도가 4.6 MPa 향상되어 3,400-3,970 cm2/g 범위에서 Blaine을 증가시키는 것보다 향상 효과가 뛰어난 것으로 분석되었다.

Keywords

Acknowledgement

이 연구는 2023년도 한국산업기술평가관리원의 연구비 지원에 의한 연구개발사업 결과의 일부임. 과제번호 : 20110616

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