The comparison of projectile impact resistance of ultra-high-performance fibre-reinforced concrete with various aggregates
Research Institute for Building materials, Hnevkovskeho 65, Brno, Czech Republic
2 The Institute of Theoretical and Applied Mechanics of the Czech Academy of Sciences, Prosecka 79, Praha, Czech Republic
* Corresponding author: firstname.lastname@example.org
Published online: 9 September 2021
In order to apply the ultra-high-performance fibre-reinforced concrete (UHPFRC) in the constructions of ballistic protective structures, the impact resistance of UHPFRC has been investigated experimentally by conducting the high-speed projectile penetration tests. 5 mixtures with basalt and corundum aggregates with various grain size have been prepared and subjected to the quasi-static and 7.62 x 54R B32 API projectile impact load using the striking velocity of 850 m/s. The influence of the strength, size and material of the aggregate on the projectile impact resistance represented by differential efficiency factor (DEF), structural integrity and area and height of impact crater has been evaluated. The superior projectile resistance of UHPFRC with corundum has been observed. Regarding the size of the aggregates, the incorporation of coarser aggregates brings better projectile impact resistance.
© The Authors, published by EDP Sciences, 2021
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