Journal of the Architectural Institute of Korea (대한건축학회논문집)

Architectural Institute of Korea (대한건축학회)
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Effect of Damage Control Gas on Chemical Stabilization of Cement Paste Exposed to High Temperature

고온에 노출된 시멘트 페이스트의 화학적 안정화에 미치는 Damage Control Gas의 영향

  • 김민혁 (한국건설생활환경시험연구원 음환경센터) ;
  • 허영선 (한국건설기술연구원 화재안전연구소) ;
  • 이건철 (한국교통대학교 건축공학전공)
  • Received : 2019.11.14
  • Accepted : 2021.02.25
  • Published : 2021.06.30
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Abstract

In this study, As a study on the recovery characteristics of concrete exposed to high temperature, the effect of DCG on the chemical recovery of cement paste exposed to high temperature was investigated. As the conditions for examination, the cracked surface was cured using a DCG to the cement paste test body heated to a high temperature of 800 ℃. Curing conditions was experimented with 20 minutes of DCG exposure, 40 minutes of retention. Experiments focused on chemical analysis using XRD and crack observation using high magnification cameras. Experiment result, Calcite appeared to increase in all sections, and Portlandite and C3S were chemically combined with DCG to produce Calcite and reduced in all sections and the width of the crack could also be confirmed to be reduced in fine detail. In other words, in the case of DCG cured specimens, the amount of cracks after heating decreased compared to the non-cured specimens.

Keywords

Acknowledgement

이 연구는 2021년도 한국연구재단 연구비 지원에 의한 결과의 일부임. 과제번호:2020R1F1A104824112

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