Additional examples are adjusted to the entries in an automated way - we cannot guarantee that they are correct.
Modern concrete mix designs can be complex.
Although it is not required by the rules of the competition, some competitive concrete canoes have concrete mix designs that are less dense than water.
Recently concrete mix design for partial cement replacement with High Volume Fly Ash (50% cement replacement) has been developed.
The mechanical properties of hardened concrete increase if less water is used in the concrete mix design, however reducing the water-to-cement ratio may decrease the ease of mixing and application.
The Concrete Canoe Competition is designed to provide civil engineering students with an opportunity to gain hands-on, practical experience and leadership skills by working with concrete mix designs and project management.
Cracking of the concrete section is nearly impossible to prevent; however, the size and location of cracks can be limited and controlled by appropriate reinforcement, control joints, curing methodology and concrete mix design.
In the quarter century since Willow Creek, considerable research and experimentation have yielded innumerable improvements in concrete mix designs, dam designs and construction methods for roller-compacted concrete dams; by 2008, about 350 RCC dams existed world-wide.