Study on resistance of reactive powder concrete to impact

In order to validate the resistance of steel-fiber reactive powder concrete(RPC) to impact, a group of tests on RPC with 5% steel-fiber under penetration and contact detonation are conducted. The penetration tests are carried out by the semi-armor-piercing bullets with the diameters of 57 mm and earth penetrator with the diameters of 80 mm. Velocities of the two kinds of projectiles are 300-600 m/s and 800-900 m/s, respectively. According to the analysis and contrast between the test data of RPC samples and the calculation results for C30 reinforced concrete by using experiential formula under penetration, it is proved that the resistance of steel-fiber RPC to penetration and contact detonation is about 2 times against that of C30 reinforced concrete. The theoretical calculation formula for penetration in RPC is also validated to be precise by tests. The tests of contact detonation are conducted by TNT with the mass between 0.5 kg and 3.0 kg. Through analysis and contrast between the test data of RPC and the calculation results for C30 reinforced concrete by using experiential formula under contact detonation, it indicates that the resistance of steel-fiber RPC to contact detonation is about 3 times against that of C30 reinforced concrete. The factors of resistance of RPC to impact are analyzed. The blasting compressive coefficient 0.042 is obtained for RPC, which fills up the gap in structural design for protective building engineering.