This paper reports on a new strengthening system for concrete elements, being composed of carbon- fiber reinforced polymer fabrics (CFRP fabrics) embedded in shotcrete. The strengthening system was evaluated in a test series on full-scale single span slab strips of 6 m length, on a non-strengthened reference specimen and two slab strips with different strengthening ratios. The paper discusses the test results with regard to serviceability limit state (flexural stiffness, crack widths, and admissible loads for given deflection limits), and to ultimate limit state (strengthening ratio, behavior at rupture, post-peak bearing capacity, and ductility). It concludes with some analytical considerations on the structural behavior and bearing capacity of the new strengthening system.