Laval - Canadian National Champion"
The seven time Canadian national champion stepped up to the stage and proceeded to make their presentation of “Iceberg.” Two male and one female team member dressed in formal attire gave the presentation. The team billed the canoe as the best canoe ever built and highlighted steps taken to study the static and dynamic performance of their canoe.
The steps taken to optimize the design were outlined and the team showed a flow diagram for doing this. Laval used a solvent to increase the workability and viscosity of their concrete. They defined the local stress criteria used to evaluate their design and contrasted the various mixes designed. They elaborated on how they used a hydraulic system to fabricate their canoe and ended up by telling the audience to remember: “Laval did it!”
The judges began by asking why were steps taken to limit the deflection of the hull to 0.2”? What steps were taken to insure that the addition of acetone would not affect the material properties of the concrete? What safety precautions were taken during the project? What is “super” white Portland cement? How did you decide where to put the strain gages on your boat? How did you know what pressure to apply when applying the cement? Why did you feel that dynamic testing was required? What condition created the maximum stresses? How do you define and measure the “shootability” of concrete? Why did you want to reduce the amount of paste in your mix?
The presentation was very solid and the team addressed the questions well. Laval had to overcome a significant language barrier and did a good job in this category.