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M. Mironova and V. Naidenov


The main strength-deformation properties of fine-grained fiber-reinforced concretes with different type and quantity of fibres, used as repair overlays, are discussed. The results of mechanical properties of experimental compositions are obtained and generalized for two basis ages and standard laboratory environment. The experimental results are mathematical processed using MATLAB procedure. The basic character- istics - residual strength, toughness indexes and residual strength factors are obtained as a function of type as well as quantity of the hybrid fibre- reinforcement.