IntermediateTopic 72 of 112Civil & Structural
Repair and rehabilitation
Methods for restoring or strengthening damaged structures.
In depth
After condition assessment (visual, NDT, cores), repair options include patch repair, crack injection, jacketing, FRP wrapping, external post-tensioning, section enlargement and cathodic protection. Compatibility, surface preparation and addressing the cause are crucial.
Key points
- Carbon-fibre plates
- Electrochemical chloride extraction
- Strengthening for new loads
ExampleCorroded columns are repaired by removing damaged concrete and applying a jacket.
What is Repair and rehabilitation?
Methods for restoring or strengthening damaged structures.
Why is it important to understand repair and rehabilitation?
Repair and strengthening extend the life of structures, which is often more economical than replacement and is essential for heritage assets.
What is the first step in a repair project?
A condition survey to find the cause of damage and the extent of deterioration, so the repair treats the cause and not just the symptoms.
What is carbon fibre strengthening?
Bonding fibre-reinforced polymer plates or sheets to the structure, which adds tensile capacity without much extra weight.
How is Repair and rehabilitation used in practice?
Typical applications include repairing spalled concrete on a parking deck, strengthening an old bridge with carbon fibre plates to take heavier loads and restoring a masonry wall with grouting and tie bars.
What should I learn before Repair and rehabilitation?
Study "Corrosion and durability" first (topic 71 of 112 in Civil & Structural). It covers the groundwork this topic builds on.
What are the key points of Repair and rehabilitation?
Carbon-fibre plates. Electrochemical chloride extraction. Strengthening for new loads.
Can you give an example of Repair and rehabilitation?
Corroded columns are repaired by removing damaged concrete and applying a jacket.
What comes after Repair and rehabilitation?
The next topic is "Fire engineering", which builds directly on this one.
How difficult is Repair and rehabilitation?
It is classed as Intermediate in Civil & Structural (topic 72 of 112). It is an intermediate topic. Work through the beginner topics in Civil & Structural first.