Concrete jacketing is a technique used in structural engineering to reinforce and strengthen existing concrete columns, beams, and walls. It involves the application of a new layer of concrete (called the jacket) around the existing concrete element, which effectively increases its strength, durability, and load-bearing capacity.
The process of concrete jacketing typically involves the following steps:
Surface preparation: The surface of the existing concrete element is cleaned, roughened, and prepared to receive the new concrete layer.
Application of bonding agent: A bonding agent is applied to the surface of the existing concrete element to ensure a strong bond between the existing and new concrete layers.
Installation of reinforcing steel: Reinforcing steel (such as rebar) is installed around the existing concrete element to provide additional strength and support.
Shear Connectors: Shear Connectors or Shear Links are steel hooks to provide a mechanical interlock between the concrete member and the steel member or new Concrete member. Grouted with epoxy in old concrete and tied with new to be cast concrete steel bars to transfer loads.
Pouring of new concrete: Fresh concrete is poured into the formwork, filling the void between the existing concrete element and the formwork.