DOI QR코드

DOI QR Code

High Temperature Properties of Fire Protection Materials Using Fly Ash and Meta-Kaolin

Fly Ash 및 Meta-Kaolin을 활용한 내화성 마감재의 고온특성

  • Song, Hun (Green Ceramic Division, Korea Institute of Ceramic Engineering & Technology) ;
  • Chu, Yong-Sik (Green Ceramic Division, Korea Institute of Ceramic Engineering & Technology) ;
  • Lee, Jong-Kyu (Green Ceramic Division, Korea Institute of Ceramic Engineering & Technology) ;
  • Do, Jeong-Yun (BK21 Research Team, Kunsan National University)
  • 송훈 (한국세라믹기술원 그린세라믹본부) ;
  • 추용식 (한국세라믹기술원 그린세라믹본부) ;
  • 이종규 (한국세라믹기술원 그린세라믹본부) ;
  • 도정윤 (군산대학교 BK21산학협력단)
  • Received : 2009.11.30
  • Accepted : 2010.02.24
  • Published : 2010.05.31

Abstract

The serious issue of tall building is to ensure the fire-resistance of high strength concrete. The fire resistant finishing method is necessarily essential in order to satisfy the fire resistance time of 3 h required by the law. The fire resistant finishing method is installed by applying a fire resistant material as a method of shotcrete or a fire resistant board to high strength concrete surface. This method can reduce the temperature increase of the reinforcement embedded in high strength concrete at high temperature due to the installation thickness control. This study is interested in identifying the effectiveness of inorganic alumino-silicate compounds including the inorganic admixture such as fly ash and meta-kaolin as the fire resistant finishing materials through the analysis of fire resistance and components properties at high temperature. The study results show that the fire resistant finishing material composed of fly ash and meta-kaolin has the thermal stability of the slight decrease of compressive strength at high temperature. These thermal stability is caused by the ceramic binding capacity induced by alkali activation reaction by the reason of the thermal analysis result not showing the decomposition of calcium hydrate. Inorganic compounds composed of fly ash and meta-kaolin is evaluated to be very effective as the fire resistance material for finishing to protect the concrete substrate by the reason of those simplicity in both application and manufacture. The additional study about the adhesion in the interface with concrete substrate is necessary for the purpose of the practical application.

Keywords

Fire;High Temperature;Explosive spalling;Fly Ash;Meta-Kaolin

References

  1. H, Song, J. W. Ko, and S. Sugahara, “Thermal Properties and Explosive Spalling for High Strength Concrete(in Korean),” J. Kor. Con. Insti., 20 [5] 26-32 (2008).
  2. H, Song, S. H. Lee, and S. Sugahara, “Control method of Explosive Spalling for High Performance Concrete(in Korean),” J. Kor. Con. Insti., 17 [3] 33-9 (2005).
  3. KICET, Development of Fire Protection Method for High Strength Concrete(in Korean); pp. 25-52, KICET, 2008.
  4. AIJ, Diagnosis and Repair Methods of Fire Damaged Buildings, pp. 40-63, Archi. Insti. Jpn., 2004.
  5. AIJ, Design and Practice of Fire Performance Materials, pp.136-148, Archi. Insti. Jpn., 1993.
  6. Z. P. Bazant and M. F. Kaplan, Concrete at High Temperatures, Material Properties and Mathematical Models; pp.6-26. longman House, England, 1993.
  7. B.W. Jo, “Strength Behaviour and Hardening Mechanism of Alkali Activated Fly Ash Mortars (in Korean),” Proceedings of the Kor. Con. Insti, 321-24 (2004).
  8. A. Fernandez-Jimenez, A. Palomo, and M. Criado, “Microstructure Development of Alkali-activated Fly Ash Cement: A Descriptive Model,” Cem. Concr. Res. 35 1204-09 (2005) https://doi.org/10.1016/j.cemconres.2004.08.021
  9. J. Davidovits, “Giopolymer Chemistry and Sustainable Development”, Proceedings of the Geopolymer, 9-15 (2005).