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A Study on the Fire Resistance Performance of RC Structure Void Slab Using The Lightweight Hollow Sphere  

Cho, Bum-Yean (한국건설기술연구원)
Yeo, In-Hwan (한국건설기술연구원)
Kim, Heung-Youl (한국건설기술연구원)
Kim, Hyung-Jun (한국건설기술연구원)
Kwon, In-Kyu (강원대학교)
Publication Information
Fire Science and Engineering / v.25, no.6, 2011 , pp. 89-97 More about this Journal
Abstract
This study is for evaluating the fire resistance performance (1~2 h) of the RC Structure void slab using the Lightweight Hollow Sphere, which can reduce the unnecessary dynamic part of removing the central concrete. For this experiment, we set up depth of concrete cover, live load, and span length as the factors. The result comes out with all the slabs under those conditions can ensure the goal fire resistance performance (120 min). And among these factors, the resisting capability changes more sensitively with the live load rather than the thickness of cover. And the shorter span length could assure the better the fire resistance performance. The result observing the character in high temperature of the Lightweight Hollow Sphere which does not used as existing RC structure slab, a delay section in temperature change is occurred due to the Glass Transition in $100^{\circ}C$. And heat transfer by conduction does not occur at lightweight hollow sphere because the polystyrene in EPS (Expanded Polystyrene) melts point in $185^{\circ}C$. Therefore temperature at lightweight hollow sphere is lower than the concrete and rebar.
Keywords
Void slab; Fire resistance; Lightweight hollow sphere; EPS;
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