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An Experimental Study on the Fireproof Covering Thickness of High Strength Concrete Members with Spray Coating  

Lee, Tae-Gyu (우송대학교 철도건설환경공학과)
Publication Information
Fire Science and Engineering / v.24, no.4, 2010 , pp. 41-46 More about this Journal
Abstract
High strength concrete (HSC) has been mainly used in large SOC structures. HSC have superior property as well as improvement in durability compared with normal strength concrete. In spite of durability of HSC, explosive spalling in concrete front surface near the source of fire occurs serious problem in structural safety. Therefore, this study is concerned with experimentally investigation of fire resistance at high temperature due to fireproof material covering thickness in addition to concrete cover. From the test result, it was appeared that the use of fireproof material results in good performance for fire resistance and spalling prevention, and the optimal fireproof covering thickness is 1~3mm. On the other hand, the temperature was rapidly increased by explosive spalling within 30 minutes and showed very little rise caused by evaporation heat after then. It was also found that the void channel was remained at high temperature as PP fiber melts at about $200^{\circ}C$, and the pore pressure in concrete was decreased.
Keywords
High strength concrete; Fire resistance; Covering thickness; PP fiber;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
연도 인용수 순위
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