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