Lightweight Protective Sandwich Structure with UHPC Core

  • Petr Hála orcid logo (Czech Technical University in Prague)
  • Přemysl Kheml orcid logo (Czech Technical University in Prague)
  • Alexandre Perrot (Synpo)
  • Jiří Mašek (Spolchemie)
  • Radoslav Sovják orcid logo (Czech Technical University in Prague)


Ultra-high performance fiber reinforced concrete (UHPFRC) can be used to build light bulletproof structures, as even its thin layer can prevent projectile perforation. However, the pieces of debris may break off a thin UHPFRC structure during a projectile impact. The resulting secondary fragments may cause injury to persons or damage property in the structure's vicinity. To address this issue, we developed a new-generation sandwich structure consisting of a UHPFRC core, a fiber-reinforced epoxy composite, and an elastomeric coating. UHPFRC and composite provide penetration resistance. Composite and elastomer mitigate UHPFRC fragmentation. Light and affordable bulletproof panels can be produced by appropriately designing these three materials, their thickness, and their position in the sandwich structure. The ability of the panels to prevent projectile perforation and the formation of secondary fragments was demonstrated using experimental and numerical methods. Thanks to their unique shape, these panels can be combined to form a mobile and modular protective barrier. The barrier can take the form of a wall with different opening angles or an outpost with a hexagonal plan. It can be moved and assembled fast by only two people.

Keywords: UHPC core, sandwich structure, balistic resistance

How to Cite:

Hála, P., Kheml, P., Perrot, A., Mašek, J. & Sovják, R., (2023) “Lightweight Protective Sandwich Structure with UHPC Core”, International Interactive Symposium on Ultra-High Performance Concrete 3(1): 16. doi:

Rights: © 2023 The Author(s). All rights reserved.

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Published on
04 Jun 2023
Peer Reviewed