Elements and Performance Criteria
- Prepare for underwater concreting
- Work task and worksite data are determined and analysed to determine the specific requirements for the concrete.
- Work plan is developed consistent with the dive plan.
- Concretingequipment is selected, inspected and prepared including protective equipment.
- Concreting equipment is secured safely to/from the dive site.
- Access obstructions and other hazards are assessed and action is taken to remove/reduce the risk.
- Concrete underwater site
- Work-safe area is established at the worksite.
- Site is cleared and levelled in preparation for the pour.
- Formwork is assembled including stripping agents.
- Reinforcing bars, rods, stirrups and mesh, bar chairs and spacers are positioned.
- Cement is mixed in accordance with the setting and strength specifications.
- Location and safety of divers is confirmed prior to commencing the pour.
- Cement is delivered to the site with a consistent flow.
- Concrete is spread to the required levels incorporating expansion joints.
- Concrete is screeded to a level and the surface is finished using floats or brooms.
- Concrete is protected during curing.
- Conclude underwater concreting