protective structures

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.

Due to today's conditions, it is necessary to reconsider the purpose of buildings and structures that use a significant number of reinforced concrete elements subjected to complex stress-strain states. The researchers are faced with the task of determining the residual bearing capacity of an element with uneven damage, which will allow choosing the most optimal option for calculating and selecting materials.