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A detailed diagnosis of a concrete cancer problem must be undertaken before any remedial works begin. Our building engineering consultants conduct a diagnostic analysis identifying the cause of the problem and outlining what needs to be repaired.
Depending on the cause of concrete cancer, our building services engineers explain some of the common methods of repair:
Simple replacement: With less severe damage, our building engineering consultants may be able to repair the damaged concrete as well as clean and replace the rusted, exposed steel and fill in cracks.
Polymer repair: Where concrete carbonation and low concrete cover are a problem, a polymer modified repair system can be used. This involves removing the concrete around the reinforcing bars and cleaning the steel, before applying both the steel primer and polymer modified material. At this point, an anti-carbonation protective coating to the whole concrete surface can be undertaken, as well as additional reinforcement or replacement of steel anodes before the reapplication of concrete.
Electrochemical treatment: For seaside buildings, specialist repair options may be required when it comes to chloride contamination. If it’s a case of chloride contamination in a building near the ocean, you might need to have specialist repair work done to treat the concrete cancer. This can include electrochemical treatment, such as Cathodic Protection, where the reinforcement is protected by a cathode element in an electric current.
To prevent reoccurrence of concrete cancer, correct waterproofing systems should be put in place. By sealing the new concrete horizontal surfaces, the risk of future water damage is minimised whilst also preventing harsh chemicals contaminating the concrete from entering through pores.
To find out more about concrete cancer repair and waterproofing your building, contact our strata remedial building services in Sydney.