Geogrids are categorized as one of the geosynthetics materials that are used for soil stabilization and reinforcing of 
earth structures such as earth walls and dams. This research investigated the effect of using uniaxial geogrids as 
additional reinforcement, in addition to, steel fibers in the concrete mix, on the flexural behavior of beams. The 
experimental research work comprised of testing thirteen simply supported reinforced concrete (R.C) beams which 
were tested up to failure under four-point loading. The variables of this study are: the volume of steel fibers (0.0, 
0.5, 1.0 %), number of geogrid layers (one, two, and three layers), the shape of the geogrid layers, and the 
longitudinal reinforcement percentage. The mid-span deflection, failure loads, ductility, crack patterns, steel, 
concrete and Geogrid strains of the beams were reported and compared. The test results concluded that the addition 
of Geogrid layers as a reinforcing technique proved to be an effective tool to improve the flexural behavior of R.C 
beams and improve the cracking patterns. The number of geogrid layers used in the beams plays a significant effect 
in increasing the failure loads and decreasing the deflections of the beams. The addition of steel fibers in R.C 
beams, in addition to, Geogrid layers increases the cracking loads, failure loads and reduces the deflection of beams 
at failure loads. Increasing the fiber content from (0.5%) to (1%) had a slight effect on increasing the maximum 
carrying capacities of the beams. Addition of U-shaped Geogrid layers had a considerable effect on increasing the 
failure loads rather than the addition of Geogrid layers in the tension zone only