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Title |
Spalling Reduction Methods of Ultra High-Strength Reinforced Concrete Columns
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Keywords |
폭렬 ; 화해 ; 내화재 ; 잔존강도 ; PP섬유 Spalling ; Fire damage ; Fire endurance material ; Residual strength ; Polypropylene fiber |
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Abstract |
It was presented that the spalling of high strength concrete exposed to high temperature could be reduced by using polypropylene fiber. However, as the concrete strength increase, the demanded quantity of PP fiber increase and this results in the loss of workability of ultra high strength concrete. The silica fume which is essentially mixed in ultra high strength concrete decrease the permeability of concrete, and this will increase the degree of spalling. In this study the effect of silica fume on the spalling of ultra high strength concrete and the fire resisting efficiency of PP fiber and poly vinyl alchol, instead of PP fiber, for the security of workability were experimentally examined.
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