Behavior of pumice hybrid-fiber reinforced concrete slabs under blast loading

Nowadays, explosion phenomenon has been considered by structural engineers due to the increase of terrorist attacks and unforeseen events. Therefore, the calculation of the final dynamic loads resulting from these loadings should be considered as a criterion in order to design structures and protect military buildings. In this investigation, the behavior of pumice hybrid-fiber reinforced concrete slabs under blast loading was assessed. To evaluate the performance of pumice hybrid-fiber reinforced concrete, contact explosion test on slabs with dimensions 100×100×10 cm was conducted. Six slabs including one unreinforced concrete slab and five fiber reinforced concrete slabs were prepared. Also, C4 explosive material was used to investigate different failure modes of slabs. The results showed that the addition of various types of fibers improved the behavior of slabs. The results showed that the addition of various types of fibers improved the behavior of slabs .Also, it is concluded that replacement of cement and steel fibers with pumice and polyolefin fibers, respectively, led to a slight increment in number and extent of cracks, however, the costs were significantly decreased.