Northern Arizona University By: Jeremy DeGeyter Kristin Van Sciver Matt Snyder
“ F ear Nothing ” Motto h a ● Goal: Improve across the board Paddling o Fundraising o Concrete Mixture o Post-Tensioning Application o Aesthetics o F igure 1 : 2015 Canoe Team F igure 2 : Practice Races F igure 3 : Paddle Practice a h
u H ull Design ● Shallow Arch Bottom ● 5-in rocker ● 21-ft long, 27-in wide ● Prolines F igure 4 : Prolines Hull Model o Optimum Speed 5.4 knots (6.2mph) a u h
t Structural Analysis ● Max moment of 4-lbin/in Two person loading analysis o Transverse direction o ● Capacity of 30-lbin/in F igure 5 : Transverse Free-Body Diagram Based on one layer reinforcement o Does not include ribs o a u h t
Concrete Mix r Table 1 : Final Mix Properties Final nal Concr ncrete te Struct uctural ral Mix: x: Wet/Dr t/Dry Uni nit t 65.5/57.4 pcf Weight ● Final Consituents: 28 Da Day Compre ressive ive 2150 psi EkkoMAXX o Stre reng ngth th Poraver (0.5mm-1mm) 28 Da Day Tens nsile le o 225 psi 3M Glass Bubbles (S32) Stre reng ngth th o 28 Da Day Fle lexural ural MasterFiber M 100 o 725 psi Stre reng ngth th MB-AE 90 Air Entraining Admixture o ● What is EkkoMAXX? Sustainable alternative to Portland o 100% fly ash based o Resistant to chemical attack o Reduced shrinkage o First time used for concrete canoes o F igure 6 : Concrete Mix r a u h t
Mold Construction d u F igure 8 : Hot-Wire Cutting Foam F igure 7 : Cross-Section Cutout F igure 10 : Finished Foam Mold F igure 9 : Gluing Cross-Sections r a u h t u d
Pour Day D F igure 11 : Spraying Concrete Layers F igure 12 : Troweling Concrete Layers F igure 13 : Placing Post-Tensioning F igure 14 : Placing Reinforcement Mesh D r a d u h t u
Post-Tensioning g o ● Provides 690-lbs of axial compression to increase flexural cracking load ● Six-7x7 galvanized steel tendons were placed symmetrically about the F igure 16 : Anchorage System centroid ● Designed for 115-lbs of tension after calculated losses F igure 17 : Post-Tensioning Net F igure 15 : Tensioning System r a o g u h t D d u
Curing and F inishing n F igure 19 : Curing Tent F igure 18 : Curing Frame F igure 20 : Sanding F igure 21 : Staining a no g u h t D r d u
Aesthetics s F igure 22 : Silicone Rib Mold F igure 25 : Arizona Flag Stain F igure 24 : 3D Elements in Bulkhead F igure 26 : Flagstaff Night SkyStain F igure 23 : Rib in Canoe a u h t s D r d no g u
Presenting… e Dreadnoughtus Dr Dreadnoughtus e adnoughtus
Questions? Dreadnoughtus
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