Review article

The document specifies the results of effects of high temperatures at fire on strength characteristics of steel fiber reinforced concrete (SFRC) with high-strength cement-sand matrix containing microsilica. It is shown that within 200-300 °С temperatures there emerges the effect of essential hardening of both matrices, and SFRC with different types of fiber and percent of reinforcement, which can be explained by puzzolanic reaction of interacting of pulverous silicate moisture containing components with calcium hydroxide.