| 논문명 |
60MPa급 고강도 콘크리트의 폭렬방지 / Spalling Resistance of 60MPa High Strength Concrete / 11. 제9분과 재료및시공 |
| 저자명 |
배장춘 ; 유승엽 ; 지석원 ; 한창평 ; 양성환 ; 한천구 |
| 수록사항 |
대한건축학회 학술발표대회 논문집 (2006-10) |
| 주제어 |
고강도 콘크리트 ; 폭렬방지 ; 폴리프로필렌 섬유 ; High strength Concrete ; Spalling Resistance ; Polypropylene Fiber |
| 요약2 |
This study investigates the fundamental properties and fire resistance performance, such as spalling appearance and residual compressive strength, of 60MPa, high strength concrete with various amounts of polypropylene (PP) fiber. Test showed that increase of PP fiber decreased fluidity and increased air content. In addition, compressive strength of concrete containing the fiber declined the value, but tensile strength was about the same, regardless of fiber contents. After fire test was completed for one hour, specimens without PP fiber and with 0.05vol%of PP fiber exhibited severe spalling, due to sudden heat and internal vapor pressure. However, specimens containing more than 0.1vol% of PP fiber resisted spalling occurrence. Meanwhile, residual compressive strength of specimens significantly decreased. Most of all specimens being protected from spalling were also indicated in reduction of the residual strength value as small as 20～28%. This was resulted in internal severe cracks already. |
