Structural Repair
Concrete Repair: Remove the Cause Before Rebuilding the Surface
Spalling and exposed reinforcement are symptoms. Carbonation, chlorides, water ingress, poor cover or cracking may be driving deterioration.
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New rust stains form at the edge of a previous repair.
Use the site evidence to agree a project-specific method with the responsible engineer, concrete producer, manufacturer or specialist applicator.
New rust stains form at the edge of a previous repair.
Investigate adjacent steel, chloride or carbonation extent, cover and moisture sources.
A small isolated patch may leave active corrosion beside it.
Extend condition assessment and design protection for the affected member or zone.
Treat reinforcement and repair boundaries under engineer-approved method; restore cover.
Monitor adjacent areas and record corrosion or moisture changes.
Do not repeat the same localized patch without reviewing the wider cause.
References inform the topic; they do not endorse a specific product for this project.