Local failure of reinforced concrete (RC) slabs subjected to projectile impact has been classified into spalling, scabbing, and perforation. While the causes of the local failure were reported to be the stress wave propagation and local deformation in the impact region, reinforcing and mitigating methods are needed to restrain the scabbing in the practical design of concrete structures. This study examined the impact resistant performance of several reinforcing and mitigating technologies such as application of polypropylene short fiber-reinforced concrete, ultra-high performance fiber-reinforced concrete, attachment of aramid fiber sheet, and coating polyurea resin. A series of impact tests revealed that polypropylene short fiber-reinforced concrete and ultra-high performance fiber-reinforced concrete decreased the scabbing limit slab thickness by 25–35% by enhancing resistance to the projectile impact, and aramid fiber sheet attachment and polyurea resin coating on the back surface reduced the scabbing limit slab thickness by approximately 25% as compared with RC slabs.