The article describes the development of rapid-hardening, high-strength fiber-reinforced concrete with increased impact resistance for protective structures. Fiber-reinforced concretes with the addition of Portland cement CEM II/A-LL 42.5 R (C = 390 kg/m3) with polymer structural fiber PMS 1/60 with the addition of PCE were studied. The addition of PMS 1/60 fiber to concrete increases impact strength by 2.8-3.7 times and achieves a strength class of C 40/50. Fiber-reinforced concretes with the addition of Portland cement CEM II/A-S 52.5 R were studied. The addition of PMS 1/60 fiber provides an increase in the impact resistance of concrete at an early age by 2.7-3.1 times, and at the design age by 3.9-5.5 times. The developed fiber-reinforced concretes are classified as high-strength and rapid-hardening. The use of rapid-hardening high-strength fiber-reinforced concrete with increased impact resistance will increase resistance to mechanical loads and explosive impacts and ensure reliable protection of protective reinforced concrete structures.
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