Despite advantages and unique features of fiber reinforced polymers (FRP) in strengthening concrete elements, problems such as being unsuitable for application on wet surfaces and low fire-resistance have urged researchers to seek novel alternative methods. Among them, fiber reinforced cementitious matrix (FRCM) composites have the ability to address the abovementioned problems by using inorganic matrices. In this study, 14 beam specimens with a cross-section of 250 × 300 mm and a length of 2200 mm were constructed and subjected to flexural test. The test beams were categorized into two distinct groups based on their strengthening systems. Six beams were strengthened in flexure using FRP composites, and the other eight beams were strengthened in flexure by the FRCM composites, as the main aim of this study was to compare the performance of the FRP and FRCM strengthened systems. Other parameters such as the strengthening method and the arrangement and ratio of tensile reinforcement in the beam were also investigated. Results indicate that beams strengthened by FRCM composites exhibit a significantly higher ultimate load compared to the companion beams strengthened by FRP composites.

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