Textile-reinforced concrete (TRC) is a high-performance composite in which technical textiles made of high-performance fibers are embedded in a fine-grained concrete matrix. Textile-reinforced concrete extends concrete applications to completely new fields. Besides slender new concrete elements, strengthening of already-existing concrete structures by thin textile-reinforced concrete layers is possible. This type of strengthening noticeably increases both the ultimate load-bearing capacity and serviceability of reinforced concrete structures. This aspect is shown in the present paper using experimental results of TRC-strengthened slabs.