Below is a detailed design drawing which provides general dimensions of the cross-sections, canoe mold, and concrete thickness, as well as the different materials used throughout construction.
All posts by Justin Sorrenti
Final Mix
The table below outlines the various components of our final mix and their proportions.
Material Type | Material Name | Weight (lbs) |
---|---|---|
Cementitious Materials | Portland Cement (Type I) | 0.341 |
Slag Cement | 0.643 | |
Silica Fume | 0.103 | |
Aggregates | LS300 Cenospheres | 0.530 |
Poraver (0.5-1.0 mm) | 0.585 | |
Water | Water | 0.523 |
Sikament 686 (SP) | 0.030 | |
Sika Air (AE) | 0.023 |
Mix Day!
Winter Break Update
Our main goals for winter break were construction oriented. Our first task was designing and building a table to build our form on.
Next, we created our mold’s cross sections in AutoCAD and printed them out full-scale in order to cut each plywood cross-section using a bandsaw. Each cross-section was then centered on our table using a laser level in one foot increments.
In order to create the actual canoe hull, one inch strips of lauan were placed along the cross-sections and attached using a nail gun. To cap the ends of the canoe, Styrofoam blocks were formed into the appropriate shapes and connected to the endmost cross-sections.
Mix Designs 3 and 4
Material quantities for our third and fourth mix designs are provided below. The goal of these trials were to come up with lightweight mixes without using Elemix (expanded polystyrene) in order to increase density and compressive strength. Two different sizes of Poraver (recycled glass beads) were used in each mix. Mix 4 incorporated an air-entraining admixture to increase air content percentage.
Mix 4
Material Type | Material Name | Weight (lbs) |
---|---|---|
Cementitious Materials | Portland Cement (Type I) | 0.77250 |
Silica Fume | 0.13500 | |
Aggregates | Cenospheres | 0.41250 |
Poraver (0.25-0.5 mm) | 0.47650 | |
Poraver (0.5-1.0 mm) | 0.37500 | |
Water | Water | 0.30000 |
Sikament 686 (SP) | 0.01300 | |
Sika Air (AE) | 0.01300 | |
Additional Water for Aggregate Absorption | 0.20850 |
Mix 3
Material Type | Material Name | Weight (lbs) |
---|---|---|
Cementitious Materials | Portland Cement (Type I) | 0.35000 |
Silica Fume | 0.00505 | |
Slag | 0.00705 | |
Aggregates | Cenospheres | 0.05000 |
Poraver (0.1-0.3 mm) | 0.25000 | |
Poraver (0.5-1.0 mm) | 0.08000 | |
Water | Water | 0.25000 |
Sikament 686 | 0.03500 |
Mix Design #2
Our second mix design was created on 10/16/15 and included six 2″ x 2″ x 2″ cubes:
Material Type | Material Name | Weight (lbs) |
---|---|---|
Cementitious Materials | Portland Cement (Type I) | 0.27650 |
Silica Fume | 0.00405 | |
Slag | 0.00505 | |
Aggregates | Cenospheres | 0.03765 |
Poraver (0.1-0.3 mm) | 0.32380 | |
Elemix | 0.03060 | |
Water | Water | 0.21100 |
Sikament 686 | 0.03500 |
Compressive Strengths for Mix 1
The mortar cubes from our first mix design were tested on 10/27. Results are shown below:
Cube Number | Load (lbs) | Compressive Strength (psi) |
---|---|---|
1 | 1035 | 257 |
2 | 675 | 168 |
3 | 870 | 216 |
4 | 795 | 197 |
5 | 520 | 130 |
6 | 595 | 146 |
7 | 765 | 193 |
8 | 690 | 172 |
185 |
Preliminary Mix Design
Mixing for a preliminary design was performed on Tuesday, September 29th. Mortar cubes (2″ x 2″ x 2″) were created in order to test 28-day compressive strengths. Mix proportions can be seen on the Mix Design page.