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 repairedvaCULDT1 pressure on the average heat transfer coefficient . It is considered thatthe cross-section of the groove in the tube is composed of top, bottom portionsand two vertical sides.Also, the heat transfer coefficient is assumed to have the same value on thetop and bottom portions. To find general form of heat transfer on the twovertical sides of the groove, an inclined surface is considered as function of ioclination angle [Le. if e = 0 means a vertical side]. A theoretical formula for local and average heat transfer coefficients is obtained. A computer program is constructed in order to calculate local and average heat transfercoefficients. Experimental work was carried out a constructed test loop to verify the theoretical model developed in this work. The experimental loop consists of