Definition
Concrete jacketing is a structural strengthening method where additional reinforced concrete is placed around an existing element, such as a column, beam, or wall, to increase its load-bearing capacity, durability, and overall performance.
Explanation
This technique is commonly used when an existing structural member has suffered deterioration, reinforcement corrosion, section loss, or no longer meets required design loads. The original concrete surface is prepared, defective material may be removed, and new reinforcement is installed around the element before fresh concrete or repair mortar is applied.
Concrete jacketing increases cross-sectional area, improves confinement, and enhances strength in compression, shear, and bending depending on the repair design. It is widely used in buildings, bridges, car parks, and infrastructure where major strengthening is required without full replacement.
Successful jacketing depends on bond between old and new concrete, reinforcement continuity, and correct detailing to ensure the repaired section performs as a single structural unit.
Why It Matters
Concrete jacketing provides a practical solution where structural capacity must be restored or upgraded. It extends service life, improves safety, and avoids the cost and disruption of full structural replacement.