Results of earlier investigations indicated that although some adhesivesperforrnes adequately under normal conditions, their behaviour change when theysubjected to high elevated temperatures. Previous investigation of the behaviourof epoxy repaired concrete components under high temperature is limited.The purpose or this studies to determine their efficiency when used as arepairing materials and exposed to a higher temperature. Two techniques wereused for repairing of reinforced concrete beams in flexure, using epoxy andpolymer materials. In the first technique, the beam was repaired at the bottompart and the second using a full jacket around the beam. Effect of elevatedtemperature on control and repaired concrete beams are studied bothexperimentally and analytically, in two conditions. In the first the beams were hottested immediately after taking them out of oven while in the second, the repairedbeams were allowed to cool for seven days before testing them (residual test).Performance, characteristics, application and durability of epoxy productand polymer concrete, under elevated temperatures when used as repairingmaterials are descrihed and discussed. For the experimental work was dividedinto three groups. In group 1, 10 beams of plain concrete and 10 beams ofreinforced concrete arc tested under one concentrated load after heating for twohours duration in electrical oven, which were described as control (reference)beams for comparison of repaired beams after testing. In group 11, 44 repairedbeams specimens which are representing the beams repaired at the bottom onlyand exposed to different elevated temperatures. In the same condition of heatingexposure, the repair process by applying jacket around 42 core of plain concretewere experimented and the results were tabulated (Group Ill). The behaviourof all-tested beams under loads and the crack patterns were shown and described.The vertical deflection and horizontal strains distributions at the mid section wererecorded.Heat-finite element problem was also used for the reference and repairedbeams to predict the internal temperature distribution. Then the temperaturegradients along the central section was expressed in the form of equations forcalculating the internal temperature at any depth under the effect of any externalapplied temperature, in which the gradients of temperature on the cross-sectionwere considered by changes the material properties for every element utilized inthe finite analysis for steel and concrete are taken into consideration. Numericalanalysis by using non-linear finite element problem were also carried out toobtain the internal stress distributions, the vertical and horizontal displacementsof all nodes at different heating temperatures. Results were compared to thoseexperimentally showing acceptable results.