As works were undertaken inside a tank, the full extent of the work to be carried out was unknown until we commenced breaking out areas of damaged concrete and conducting the initial blasting works.
Once the full extent of the work was confirmed, a defect map was prepared which documented the locations requiring repair. This map can now be used by Adelaide Aqua to assist if additional repairs are required in the future.
Concrete was remediated, where required, using a solvent free epoxy binder/structural adhesive. Subsequent to the concrete repair a specialist epoxy coating suitable for water handling structures and floors was applied to the internal walls and floor of the tank.
This project was carried out in a confined space, so not only did we need to ensure all work was carried out to the highest standard, we also needed to ensure it was carried out in accordance with all applicable legislation. This included working safely at heights, entering and working in a confined space and ensuring workers were wearing and using appropriate breathing apparatus. Additionally, the tank required full containment with negative air dust extraction systems in place to prevent injury to any workers and to protect the environment. All works were carried out without incident to either workers or the environment.
A number of quality assurance tests were undertaken during this project to ensure the protective coatings were applied in accordance with technical specifications.
These tests included:
Protecting areas before abrasive blasting to ensure debris does not escape the blasting area
Concrete repair at junction of water pipe and floor with epoxy binder/structural adhesive, subsequent to blasting and before application of protective coatings
Final coat of protective epoxy to floor and walls of overflow tank
To learn more about this story call Mark O'Brien on 0418 814 538 or send an email to mark@swartandsons.com.au
