The objective of this study is to develop an efficient blast-resistant strengthening method of reinforced concrete (RC) slabs using slurry infiltrated fiber concrete (SIFCON). Contact detonation tests were carried out on RC slabs in which the concrete near the rear was replaced with SIFCON. As a result, the SIFCON cladding effectively reduced spalling damage of RC slabs, and the spall-reducing effect was raised by reducing the thickness of the SIFCON layer. Further, the spall-reducing mechanism of the RC slabs with SIFCON cladding was qualitatively discussed, based on the propagation behavior of the stress wave in a one-dimensional wave model and the punching-shear strength of the SIFCON layer. * Assist. Prof.,

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