BLAST RESISTANCE OF REINFORCED CONCRETE SLABS WITH BACKSIDES STRENGTHENED WITH SLURRY INFILTRATED FIBER CONCRETE THIN PANELS AGAINST CONTACT DETONATION

To contribute to the development of a blast-resistant strengthening method of reinforced concrete (RC) slabs using slurry infiltrated fiber concrete (SIFCON), experimental investigations were conducted regarding blast resistance of RC slabs with backsides strengthened with SIFCON panels under contact detonation. The results showed that SIFCON panel on the backside of RC slab had a good detached spall-suppressing effect equivalent to that of normal concrete with a thickness of 10.8 times. However, it should be noted that even if detached spall is suppressed by this method, damage inside RC slab progresses in the same manner as in case of no reinforcement.