1. Concrete Pontoon
(a) Shape & Dimension
- The pontoon must be square shape with dimension of 500 mm length x 500 mm width x 100 mm thick. This dimension must be built from TWO units of smaller pontoon.
- The smaller pontoon units shall be connected at its side as shown in the Example 1. There must be no obstruction or protrusion on the top and bottom surfaces of the pontoon.
- The gaps between the smaller pontoon units must not exceed 10 mm.
(b) Material
- The concrete used in the pontoon must be cement based.
- The total volume of the pontoon must consist of at least 50% concrete.
- Sustainable materials (i.e. recycled or waste materials) are encouraged to be used in the pontoon.
- The use of expanded polyethylene and polystyrene in the pontoon (both as infill or in the concrete mixture) is strictly not allowed. Any team found using this prohibited material will be disqualified.
- Material used should be non-hazardous, non-explosive and safe to use.
(c) Connector
- The connectors used to connect the smaller pontoon units must be strong, durable, non-corrosive and easy to connect.
- The connectors must be of non-metal type.
- The connectors must be visible from the top and bottom of the pontoon.
(d) Concrete Specimen and Specification
- The minimum concrete compressive strength must be 2.5 MPa.
- The surface of the pontoon must be concrete.
- The surface appearance of the pontoon must be original and free from additional coating, finishing or plastering.
- Each team is required to bring one (1) pontoon and two (2) 150 mm x 150 mm x 150 mm concrete cubes. The concrete cubes must be made from the same concrete used in the pontoon.
Participants are required to demonstrate the installation and dismantling of the pontoon during judging session.
2. Testing
- The 150 mm cubes will be used to evaluate the concrete strength.
- The pontoon will be forced to fully submerge in the water for 5 minutes. Then an initial 5 kg load will be applied on the top surface of the pontoon. Incremental load will be imposed every 5 minutes until the pontoon submerges in the water. The maximum load before the pontoon submerges in the water will be recorded.
3. Video and Presentation
- Each team is required to prepare a video displaying the information such as the team members, materials used in the pontoon, pontoon design, connector, concrete mixture and fabrication of the pontoon.
- Oral presentation by the team members is required.
- Each team will be given 3 minutes to demonstrate the installation/assembly of the smaller pontoon units.
4. Judging Criteria
The assessment of each entry will be based on the following criteria:
Marks given by the judges are final.
- Lightweightness of the pontoon.
- Stability of the pontoon.
- Flotation / buoyancy of the pontoon.
- Connector of the pontoon.
- Concrete strength.
- Creativity and innovation (pontoon design and materials used).
- Video presentation.
Marks given by the judges are final.