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A common issue with concrete structures is the development of concrete cancer. The process of concrete cancer is ongoing. Unless it is treated correctly.   

Remedy: The only way to provide a long-term solution that satisfies the contractor's obligations under the Home Building Contract Act 1991 (HBCA), is to carry out the repairs to a strict concrete cancer repair methodology.

This includes adequate concrete breakout to expose all areas of rusting steel, mechanical cleaning of the steel, and patching with high quality remediation mortars.

Other methods we often see include not exposing all areas of embedded steel, poor preparation of steel, and inadequately specified remediation materials. This is due to lack of experience or supervision on site and leads to the repairs failing in a very short time due to further development of rust. 

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