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Concrete Rectification
From the moment it is first cast, concrete is under attack from a variety of environmental factors such as;
Carbonation of concrete, ingress or chlorides, building movement, cracking & damage to concrete surfaces through abrasion
etc. All these factors reduce the concrete’s natural ability to protect steel reinforcing, resulting ultimately in
corrosion of the reinforcing. As steel corrodes it expands, causing the surrounding concrete to spall and eventually
fall off, endangering both property and passers by. This degeneration is commonly known as “Concrete Cancer”.
Repair of concrete spalling requires specialised techniques, skills and materials. In some states (eg. Queensland),
a specialised BSA license is required, specifically for concrete repairs.
It is critical to identify the cause of the corrosion before the correct repair
procedure can be established. Simply patching damaged areas can result in the corrosion being transferred to the
adjacent area, which subsequently spalls.
Treatment Procedure
· Establishing the cause of the corrosion
· Excavation of the deteriorated area.
· Halting the corrosion process.
· Reinstating the concrete.
· Protecting against future corrosion.
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