Heavy repair works
While engaging in continuous works at Golden Bay Cement for nearly 5 years, Freyssinet New Zealand’s teams demonstrated their expertise and repair capabilities and technologies.
Prior works included the removal of all existing surface coatings using ultra-high-pressure water blasting, completion of defect mapping and removal of defective concrete and corroded reinforcement -based on technical specifications covering 3 specific scenarios: corrosion deteriorated concrete repair, non-corrosion deteriorated concrete repair, filling of blowholes and surface imperfections.
Strengthening of the silos was obtained with additional, external post-tensioning using Freyssinet anchored tendons (European Technical Approval ETA 06/2026) -with grout injection before stressing to ensure a perfect strand embedment and the application of a uniform pressure to the concrete surface.
Reinstatement of reinforcement and of concrete was performed with dry shotcrete, to achieve excellent bond between the substrate and the new materials.