Proceedings of the Korean Institute of Building Construction Conference (한국건축시공학회:학술대회논문집)

The Korean Institute of Building Construction (한국건축시공학회)
권호 표지

Analysis of the Changes of composition of Hardened Cement at High Temperature by X-Ray Diffraction

X-선 회절 분석을 통한 고온 피해 시멘트 경화체의 성분 변화 분석

  • 지우람 (한국교통대학교 건축공학과) ;
  • 박지웅 (한국교통대학교 건축공학과) ;
  • 신기돈 (한국교통대학교 건축공학과) ;
  • 이건철 (한국교통대학교 건축학부) ;
  • 허영선 (한국건설기술연구원 화재안전연구소)
  • Published : 2017.11.16
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, the change of composition of cement hardened at high temperature through XRD was observed. The specimen was made of cement paste and the heating rate condition was applied at rapid thermal annealing (10.0℃ / min). The decrease of calcium hydroxide was not confirmed, but the calcium carbonate tended to be impossible or decreased after 800℃. Calcium silicate and larnite were observed to increase with increasing temperature. It is considered that silicic acid, which is a stable structure due to the decomposition of calcium silicate, is changed into a phase such as lime.

Keywords