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Oct 13, 2022 •121 likes •213 views

Parker Eaton, Tyler Bowes, Preston Cecil, Haleigh Tucker BOATY MCFLOATY FEDD 2016 Research Focused on the general composition and utility of concrete structures Main objective geared toward methods of reinforcement and processes of

  1. Parker Eaton, Tyler Bowes, Preston Cecil, Haleigh Tucker BOATY MCFLOATY FEDD 2016

  2. Research • Focused on the general composition and utility of concrete structures • Main objective geared toward methods of reinforcement and processes of mixing and curing cement • Found that greater water-cement ratio leads to greater air entrainment • Adding variety of chemical admixtures to cement increases durability and water resistance • Proper curing allows cement to retain sufficient hydration before hardening (prevents shrinking/cracking) • Providing reinforcements for the cement while drying is critical to maintaining desired structure

  3. Materials • Glass microspheres • Aluminum powder • Quikrete • Plastic cups and forks • Plywood (for base) • Trash bags • Insulation Foam • Hot glue • Concrete bonder • Gloves • Plastic Wrap • Paper Towels

  4. Foam Mold • Purchased 1x24 sheet of insulation foam • Cut foam into shaped pieces and hot glued layers on top of each other • Sanded mold by hand into final curved shaped • Finished by joining two halves of mold with glue • Also built wooden mixing box in craft center woodshop

  5. Construction of Boaty McSinky Equation: 58% Quikrete, 20% glass • microspheres, 16%water, and 6% air 2 Liters total worth of mix • Covered foam mold with trash bag prior to • application of cement Scooped Quikrete into plastic cups and • pulled out larger pieces of gravel Poured concrete powder into wooden • mixing box Added concrete binding liquid, aluminum • powder, and glass microspheres into wooden box—mixed with plastic forks Used gloves and forks to coat mold with • cement Repeated application three times, • attempting to smooth layers and prevent holes in structure

  6. Results of First Iteration • Layering cement in multiple layers caused canoe to take on water • Flimsy structure created cracks • Canoe shattered after sinking and hitting a rock • Addition of aluminum powder may have widened pores—increasing likelihood of developing holes • Required team to go back to the drawing board • Cured with wet paper towels, which were less capable of retaining moisture • Outer structure was not smooth • Failure to construct a foam mold using the Garage Shopbot prolonged construction process

  7. Second Iteration Modified plastic cups to sift out Quikrete • powder and remove gravel more efficiently Eliminated aluminum powder from list of • aggregates added Mixed all cement in one bath instead of • applying the four layers separately Cured twice daily for a period of one week • by sprinkling with water and covering with cling wrap to retain moisture for longer periods of time Sanded Interior and exterior to smoothen • texture Tested Boaty McFloaty II in Lake Raleigh on • Centennial Campus– it didn’t sink!

  8. Conclusion • Errors with “Boaty McSinky” required all members of the team to consider the Engineering Design Cycle and resolve problems through critical thinking • Learned the importance of preserving resources in case of disaster—taught team members the importance of preparing for failure • Exploration of resources and facilities aided the construction of the canoe and prevented team from going over budget • Each team member contributed their unique skills and talents to promote the project overall

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