Abstract
This paper presents the results of experimental investigations about the influence of concrete composition on the impact resistance of high-strength concrete prefabricated panels. Main test variables were the type of aggregate, the maximum aggregate diameter, the grading curve, and the binder content. The tests were accomplished using high-speed projectiles with a hard core. The impact resistance of the panels was evaluated by measuring the volumes of the craters caused by the projectile's impact and the remaining energy of the projectile. With regard to the aggregates, the use of quartzite and basalt gives a good ratio between costs of production and the resistance of the panels. The binder content and the grading curve of high-strength concrete mixtures were adjusted to each application. The maximum aggregate diameter were to be equal to or larger than the projectile's diameter to obtain a sufficient impact resistance.
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