Repair of reinforced concrete(RC) beams

Project overview

A crack in the beam between the living room and the balcony.

Analysis the reasons of cracks

There are many reasons for the cracks, such as the insufficient section of the reinforced concrete beam, the large span of the beam, the small height, the small section of the reinforced bar, the improper reinforcement position, the unreasonable node and so on, and the improper quality of the raw materials, the improper construction technology, the inaccurate control of the concrete reinforcement protection layer, and overloading the load on the beam. The formwork support subsidence, the premature dismantling of the cracks formed by the bottom die and the support, and the greater temperature difference between the concrete surface and the interior of the concrete during the hardening of the concrete, resulting in a sharp temperature change on the surface of the concrete resulting in a larger cooling contraction, resulting in cracks in the concrete.

Treatment method for the crack

Since the crack has not been extended and extended so far, the other parts of the house have no unusual situation. It can be seen that the cracks have little influence on the bearing capacity, and the surface repair method is used for the treatment of such small cracks.

The carbon fiber fabric is attached to the beam to make the reinforced bar and the reinforced concrete joint force, increase the tensile or shear ability of the structure, and improve the strength, stiffness, crack resistance and ductility of the structure.