Repair of Yielded and Buckled Reinforcement in ConcreteExcessive yielding and buckling of reinforcement occurs in severely damaged concrete structural members. The reinforcement may have buckled, elongated or excessively yielded in such members. The causes for buckling and yielding of reinforcement in concrete structures occur due to unexpected application of loads for which the member was not designed or due to durability problems in concrete.
Fig: Buckling of Reinforcement in RCC ColumnThe repair of fractured, excessively yielded and buckled reinforcement can be done by replacing the damaged portion of steel reinforcement with new steel using butt welding or lap welding. Additional stirrup ties are added in the locations of damages and then jacket concreted to provide required confinement of concrete in the repaired zone and prevent future buckling of member. Sometimes additional steel reinforcement will have to be anchored into existing masonry or concrete structural members. In such cases, a hole larger than the bar diameter is drilled. The hole is filled with grouting material such as epoxy, cement or other high strength grouting materials. The reinforcement bar is then pushed into place and held till the grout hardens. Read More: Corrosion of Steel Reinforcement in Concrete -Causes and Protection How to Control Corrosion of Steel Reinforcement in Concrete? Measuring Reinforcement Corrosion in Concrete Protection of Reinforcement Against Corrosion