The pre-stressing tendons of the main beams of the jetty structure were found to be suffering from corrosion, due to high concentration of chloride ions from the surrounding environment and low concrete covers. The RNZN sought a long-term solution to the deteriorating concrete elements to avoid repetitive repairs.The pre-stressing tendons of the main beams of the jetty structure were found to be suffering from corrosion, due to high concentration of chloride ions from the surrounding environment and low concrete covers. The RNZN sought a long-term solution to the deteriorating concrete elements to avoid repetitive repairs.
As the consulting engineer for this project, GHD undertook investigation, prepared cost estimates for various repair options, detailed cathodic protection (CP) specifications and assisted the RNZN in the tender evaluation and construction processes.
Applying CP to a pre-stressed concrete structure is not a common solution. However, due to the likely disastrous nature of failure of pre-stressed concrete structures if corrosion continues unabated, a long-term repair solution (i.e. CP) was adopted.
Our team in Sydney was responsible for this project and has since been commissioned to monitor the CP system on a regular basis.
Access to materials testing and research enables our professionals to develop cost-effective and timely solutions for materials-related issues.
Read More . . .