Among the Fire Protection in the interior representative case are spray coat, board, Paint. Intumescent paint has been developed that price competitiveness manufactures and Fire-resistances certificate was verified by experiment. Recent three-hour fire resistance performance developed Intumescent paint is applied as a high-rise, and major structures designed according to the refractory needs to be more efficient. However, domestic and outside the thermal properties of Intumescent paint materials are not proposed. Meanwhile, Intumescent paint in fire is built char layer since the 500∼60 0℃ and middle layer is formed by the decuple intumescent char more then cover thickness at room temperature. It is cut temperature flow off to the steel surface. Nonetheless, Bond Strength of steel and paint deprive as the intumescent char increases. and then steel surface are exposed to flame instantaneously. In this study, intumescent char estimate according to structural parameter(Fire resistance, cover thickness, shape ratio).

1. 서 론
  1.1 연구배경 및 목적
  1.2 강재의 국내⋅외 한계 및 허용온도
 2. 내화성능 실험
  2.1 개요
  2.2 실험결과
 3. 분석 및 고찰
  3.1 축 변형-시간관계
  3.2 강관표면 온도분포
  3.3 발포두께와 구조변수의 상관관계
  3.4 적외선 열화상 카메라를 통한 주변온도 고찰
 4. 결 론
 ACKNOWLEDGMENT
 REFERENCES

• 김선희(서울시립대학교 건축공학과 연구교수) | Kim Sun-Hee
• 옥치열(한국건설기술연구원) | Ok Chi Yeol
• 최성모(서울시립대학교 건축학부 교수) | Choi Sung-Mo