The experimental program was implemented on (11) reinforced concrete beams. Two concrete beams were taken as reference. All the concrete beams were of the same mix and reinforcement. The first one was made of normal concrete while the second beam was strengthened using GFRP strip. The remained nine beams were firstly distressed by loading them up to cracking. Then after, they were repaired using GFRP strips. The polyester contained one of three different fillers (dolomite powder, slag, or silica fume) with three different concentrations (10%, 20%, and 30%). The concrete beams were tested using two points load. The load was applied as a static load. The load was monitored using a combination of load cell on the beam and digital pressure gauge. The displacement of the concrete beams was monitored using linear voltage displacement transducers (LVDT's).