Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Influence of Drying Methods on Measurement of Hydration Degree of Hydraulic Inorganic Materials: 2) Alkali-activated slag

수경성 무기재료의 수화도 측정에 대한 건조방법의 영향: 2) 알칼리 활성 슬래그

  • 이효경 (조선대학교 건축학부 (건축공학전공)) ;
  • 송금일 (전남대학교 건축학부 (건축공학전공)) ;
  • 송진규 (전남대학교 건축학부 (건축공학전공)) ;
  • 김형기 (조선대학교 건축학부 (건축공학전공))
  • Received : 2018.01.12
  • Accepted : 2018.02.14
  • Published : 2018.02.28
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Abstract

The present study was carried out to find a suitable drying method for the determination of non-evaporable water in hydraulic inorganic materials. In Part 1 of the paper, the case ordinary Portland cement was discussed and, in this Part 2, the case of alkali active slag (AAS) was investigated. Various drying methods including vacuum and oven drying, and an ignition, were used for the AAS system having different w/b, types and amounts of alkali activators. It was found that a combination of the vacuum and oven drying was a suitable drying method for the AAS case. Although a part of the crystallized water in hydration products was decomposed, but the free and adsorbed water could be completely evaporated and the deviation of the results was small.

본 연구는 수경성 무기재료를 사용한 배합의 고정수량 측정을 위해 적절히 사용할 수 있는 건조방법을 찾기 위해 수행되었으며, 제1보에서는 보통 포틀랜드 시멘트, 그리고 본 제 2보에서는 알칼리 활성 슬래그의 경우에 대해 다루었다. 다양한 w/b, 알칼리 활성화제 종류 및 양을 갖는 알칼리 활성 슬래그에 대해 진공건조 및 오븐건조, 이 둘의 조합 그리고 작열법이 사용되었다. 실험결과, 진공건조 후 오븐건조를 사용한 경우 비록 수화물의 결정수 일부가 분해되지만 자유수분의 완전한 증발이 가능하여 그 결과값의 편차가 작았으며, 따라서 AAS의 수화도를 정량평가하기 위한 단순하고 쉬운 고정수량 측정방법으로 적합하다고 판단하였다.

Keywords

References

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