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.
 ACI 325.13R-06 Concrete Overlays for Pavement Rehabilitation, Reported by ACI Committee 325.
 Bissonnette, B., L. Courard, D. W. Fower, J. L. Granju. Bonded Cement-Based Materials Overlays for the Repair, the Lining or the Strengthening of Slabs or Pavements, RILEM State of the Art Reports, Committee 193-RLS, 2011.
 Li, V. C. Driving Infrastructure Sustainability with Strain Hardening Cementi- tious Composites (SHCC), Advances in Cement-Based Materials, London, Taylor & Francis Group, 2010, 181-191.
 Naidenov, V., St. Draganov. High Performance Concrete Flooring Systems, Proceedings of 9th Int. Conf. on Mechanics and Technology of Composite Mate- rials, Sofia, September 2000, 110-120.
 C 1018 - 97 Standard Test Method for Flexural Toughness and First-Crack Strength of Fibre-Reinforced Concrete (Using Beam with Third-Point Loading).