Golden Bay Cement, established in the 1870s and operating at its Portland site since 1917, is New Zealand’s largest cement manufacturer, producing over 850,000 tonnes annually. Several concrete silos constructed in the 1960s deteriorated over time, requiring significant remediation to restore structural integrity and ensure long‑term operational performance. Silo 2 was selected for full repair and strengthening to return it to service and extend its lifespan by a minimum of 25 years.

  • Customer/Owner:
    Golden Bay Cement
  • Engineer
    Freyssinet AU/Beca
  • Works period
    March 2016 - December 2016

Freyssinet Scope

  • Full external access installation via scaffold
  • Removal of all existing surface coatings
  • Comprehensive defect mapping of the concrete structure
  • Removal of deteriorated and delaminated concrete
  • Reinforcement augmentation and steel repairs
  • Spray‑applied concrete reinstatement
  • Crack injection and structural crack repair
  • Roof screed installation and protective coating application
  • Application of elastomeric coating for long‑term durability
  • Installation of external post‑tensioning system
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