- 골재종류 및 폴리프로필렌 섬유 혼입률 변화에 따른 고성능 콘크리트의 폭열 특성에 관한 연구
- ㆍ 저자명
- 한천구,양성환,이병렬,황인성
- ㆍ 간행물명
- 콘크리트학회논문집
- ㆍ 권/호정보
- 1999년|11권 5호|pp.69-77 (9 pages)
- ㆍ 발행정보
- 한국콘크리트학회
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
A spalling is defined as the damages of concrete exposed to high temperature during the fire by causing cracks and localized bursting of small pieces of concrete. It is reported that spalling is caused by the vapor pressure and polypropylene(PP) fiber has an important role in protecting from spalling. This paper is a study on the properties and spalling resistance of high-performance concrete with the kinds of aggregate and the contents of PP fiber. According to the experimental results, concrete contained no PP fiber take place in the form of the surface spalling and the failure of specimenns after fire test regardless of the kinds of aggregate. Concrete contained more than 0.05% of PP fiber with the aggregate of basalt does not take place the spalling, while the concrete using granite and limestone does the surface spalling. It is found that residual compressive strength after exposed at high temperature has 50~60% of its original strength. Although specimens after exposed at high temperature is cured at water for 28days, they do not recover their original strength.