배합요인 및 건조상태 변화에 따른 PP섬유 혼입 고강도 콘크리트의 폭렬특성
Spalling Properties of the High Strength Concrete Containing PP Fiber Subjected to Fire Mixture Factors and Drying Condition
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
This paper is to investigate the affecting factors on spalling of the high strength concrete including W/B, air content and moisture condition as well as PP fiber contents subjected to fire. An increase with 0.05% of PP fiber resulted in a reduction of slump flow by as much as 11%. Ten percent of air contents due to excessive amounts of AE agent does not lead to variance of slump flow, regardless of PP fiber content. For the effect of the compressive strength, high strength concrete with 15, 25 and 35% of W/B gained 60 MPa~100 MPa of the compressive strength. High strength concrete with H-air had half of compressive strength of that with L-air due to large amount of air. Fire test was conducted in accordance with KS F 2257-1 for 1 hour. Spalling did not occur with all specimens containing more than 0.10% of PP fiber except those with 15% of W/B. Moreover, it is interesting to note that the specimens with more than 10% of air content and with oven dried condition, respectively, had no spalling even if the content of PP fiber is 0.05 vol.%.
Abstract
This paper is to investigate the affecting factors on spalling of the high strength concrete including W/B, air content and moisture condition as well as PP fiber contents subjected to fire. An increase with 0.05% of PP fiber resulted in a reduction of slump flow by as much as 11%. Ten percent of air contents due to excessive amounts of AE agent does not lead to variance of slump flow, regardless of PP fiber content. For the effect of the compressive strength, high strength concrete with 15, 25 and 35% of W/B gained 60 MPa~100 MPa of the compressive strength. High strength concrete with H-air had half of compressive strength of that with L-air due to large amount of air. Fire test was conducted in accordance with KS F 2257-1 for 1 hour. Spalling did not occur with all specimens containing more than 0.10% of PP fiber except those with 15% of W/B. Moreover, it is interesting to note that the specimens with more than 10% of air content and with oven dried condition, respectively, had no spalling even if the content of PP fiber is 0.05 vol.%.
참고문헌 (13)
- 한천구, "비폭열성 콘크리트", 콘크리트 학회지, pp.5~10 (1998)
- "화재와 콘크리트", 콘크리트학회지 특집기사, 14(2) (2002)
- 한천구, "W", C 및 폴리프로필렌 섬유의 혼입률 변화에 따른 콘크리트의 고온시 성상, 2000, pp.16(10), 81~88
- 한천구, "고성능 콘크리트의 폭렬 방지에 관한 연구", pp.226~235 (1999), 계간 건자재, 99년 봄호
- 황인성, "화재시 고성능 콘크리트의 폭렬에 미치는 재 료 및 배합요인의 영향", 석사, pp.1999
- 이병열, "화재시 고성능 콘크리트의 폭렬방지에 관한 연구", 박사, pp.2001
- 송훈, "화재시 고강도 콘크리트의 내화성능에 관한 연구", 박사, pp.2003
- High performance concrete at high temperature an overview, "Long T. Phan", NIST report, ~ (2002)
- Pierre Kalifa, "High temperature behaviour of HPC with polypropylene fibres from spalling to microstructure", Cement and Concrete Research, 31, pp.1487~1499 (2001)
- Gary R. Consolazio, "Measurement and prediction of pore pressures in saturated cement mortar sujected to radiant heating", ACI Materials Journal, 95, pp.525~536 (1998)
- C.G. Han, "Performance of spalling resistance of high performance concrete with polypropylene fiber contents and lateral confinement", Cement and Concrete Research, 35, pp.1747~1753 (2005)
- Rosa Maria Espinosa, "Influence of the age and drying process on pore structure and sorption isotherms of hardened cement paste", Cement & Concrete Research, 36, pp.1969~1984 (2006)
- J.G.Sanjayan, "Design against spalling of concrete in fire", Proceeding of the First Korea-Australia Workshop on Recent Advances in High Performance Concrete, pp.155~169 (2005)