Ballistic Impact Resistance of UHPC Plates Made with Hybrid Fibers and Low Binder Content

This study assesses the ballistic impact strength of thin plates made ultra-high-performance concrete (UHPC) with low cement content (250 kg/m3) and volumes 80% steel 20% polypropylene (PP) hybrid fibers. The were prepared thicknesses 30, 50, 70 mm fiber volume ratios 1.5% 3.0%. Compressive strength, flexural tensile residual determined using experimental methods. Test results showed that regardless content, UHPC specimens fibers similar performance against impact, exerting relatively energy below 1000 J. UHPC3.0 mixture 3.0% exhibited best in terms absorption spalling resistance at levels greater than 4000 Plate sections 7 class III (highest level), as recommended for military-based applications.