| Title |
Evaluation of Fire Performance of RC Slabs with Half-Depth Precast Panels |
| Keywords |
fire performance;PP(polypropylene) fiber;explosive spalling;fire curve;half-depth precast panel;ultimate load;내화성능;폴리프로필렌 섬유;폭렬;화재곡선;반단면 프리캐스트 패널;극한하중 |
| Abstract |
The fire performance of RC slabs with half-depth precast panel after exposure to the ISO-834 fire standard without loading has been experimentally investigated. During heating, according to the ISO 834 fire curve, concrete spalling was observed for concrete without PP(polypropylene) fibers. No spalling occurred when heating concrete containing PP fibers. The maximum temperature of RC slabs with PP fibers with half-depth precast panel was lower than that of concrete without PP fibers. The ultimate load after cooling of the RC slabs that were not loaded during the furnace tests was evaluated by means of 3 points bending tests. The ultimate load of the RC slabs without PP fibers showed a considerable reduction (around 32.5%) of the ultimate load after cooling if compared with of RC slabs with PP fibers. The ultimate load of the RC slabs with half-depth precast panel with PP fibers is higher than that of a full-depth RC slabs with PP fibers. Also, the addition of PP fibers and the use of half-depth precast panel improve fire resistance. |