P14416: P3 Arborloo Concrete Base Development
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Project Summary Project Information
Project Background:

An Arborloo is a simple and affordable technology in sanitation--a moveable slab over a shallow pit that can be relocated when the pit is full. In Haiti, where sanitation coverage has dropped from 26% in 1990 to 17% in 2010 (WHO), improving sanitation is crucial, especially as it relates to preventable illness caused by unsafe drinking water, poor hygiene, and inadequate sanitation.

Arborloo Concept

Arborloo Concept

Although the current Arborloo has a developed design, there are still several shortcomings. It takes two days to install, with the majority of time needed for the concrete to set. This 3'x3' rebar enforced concrete base is not easily transportable. Also, the aesthetics of the current design, which includes a covering made out of woven palm fronds and sleeping mats, is not appealing to the Haitian population. Generally, in Haiti, there is not a perceived need to purchase and maintain Arborloos.

Traditional Arborloo Base

Traditional Arborloo Base

As a follow on to P13414, which focused on the entire design of the Arborloo, this project focuses on the design of the base. Our base design is limited to concrete, while P14415 is concurrently developing a plastic base.

Problem Statement:

The new design of the base needs to be affordable, safe, moveable, sturdy, and quick and simple to install. It needs to be resistant to environmental damage caused by climate or pests. Overall, we want to develop a product that has an impact on improving sanitation in Haiti. Key challenges include the cost and time to build. The ultimate deliverable for this project is to develop two prototypes that can be presented at the EPA Expo in Washington, DC in April of 2014.

Objectives:

1. Low cost (< $50 to purchase)

2. Base design that safely covers an 18-20 inch hole in diameter, 3-4 ft. deep hole

3. Easily constructed using simple hand tools

4. Modern aesthetics to encourage Haitians to invest in better sanitation

5. Portable (by people/donkey over long distances)

6. Resistance to environmental damage (pests, weather, use, etc.)

7. Has a modular design

Final Specs

Slab Dome Peter Morgan's
Cost $3.83 $3.78 $3.80
Weight 43.5 lbs. 31.02 lbs. 189.35 lbs.
Strength 375 lbs. 403 lbs. -
Diameter/Thickness 30"/1.5" 30"/1.25" (Dome) 40"/2"
Project Name
P3 Arborloo Concrete Base Development
Project Number
P14416
Project Family
Energy and Sustainable Systems
Start Term
2131
End Term
2133
Faculty Guide
Sarah Brownell, sabeie@rit.edu
Primary Customer
Sarah Brownell, (585)-330-6434
Sponsor (financial support)
EPA P3 Award, Dr. Thorn

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Special Thanks
Manitou Concrete, RIT Concrete Canoe Team, Joan Rothenberg Family Foundation
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Final Design and Prototypes :
Slab with Seat

Slab with Seat

Dome with Seat

Dome with Seat

Mixture Ingredient Slab (% by weight) Dome (% by weight) Peter Morgan's
Cement 33% 33% 25.1%
Coconuts 15% 21%
Sand 51% 44% 74.9%
Styrofoam 1.09% 1.56%
coconut fibers 0.09% 0.12%

Team Members

From left to right: Victoria Snell, Joe Omilanowicz, Anthony Deleo, Mac Keehfus, Evan Burley

From left to right: Victoria Snell, Joe Omilanowicz, Anthony Deleo, Mac Keehfus, Evan Burley

Member Role Contact
Victoria Snell Project Manager/Industrial Engineer vgs8878@rit.edu
Anthony Deleo Industrial Engineer ajd8400@rit.edu
Evan Burley Mechanical Engineer ecb6374@rit.edu
Mac Keehfus Mechanical Engineer mrk6510@rit.edu
Joe Omilanowicz Mechanical Engineer jto6089@rit.edu

MSD I

Project Planning Problem Definition Systems Design Subsystems Design Detailed Design

Project Readiness Package

Code of Ethics

Project Schedule - Gantt Chart

Risk Assessment

Meeting Notes (Template)

Peer Review Form

Preliminary MSD II Schedule

Photo Gallery

MSD I- Lessons Learned/Improvements

Budget Tracker MSD I

One Page Summary

Customer Questions

Customer Requirements

Engineering Requirements

House of Quality

Problem Definition Presentation

Benchmarking

Morphological Table

Pugh Chart I

Pugh Chart II

Functional Decomposition

Functional Architecture

Initial Geometry Stress Analysis

SDR Presentation

Mold Design Options

Shape Validation

Compression Test Plan

Flexural Test Plan

Testing

Cost Analysis

Mixture Overview

Mix Comparisons with Radar Charts

Squat Hole Size Determination

SSDR Presentation

SSDR Feedback

Final Mold Designs

Features

Detailed Drawings

Updated Risk Assessment

Bill of Materials

Assembly Manual

Preliminary Test Plans

Preliminary DDR

DDR Agenda

DDR Feedback

MSD II

Project Planning Testing Complete Design

MSD I Team Assessment

Weekly Update Agendas/Minutes

Actions, Issues, Decisions Log

Project Schedule / Gantt Chart

Final Budget Tracker

MSD II Team Assessment

Reinforcement Flexural Mold Results

Mold Test

Hole Size Test

Strength-Safety Test

Non-Eng. Specs Tests

Example Test Plan

Test Results

Cumulative Test Results (Excel Workbook)

Design Description

Bill of Materials

Life-cycle Assessment

Technical Paper

Poster

Materials

Materials

Preparing a Mixture

Preparing a Mixture

Mixing

Mixing

Slump Test

Slump Test

Mix 5 Cylinder: Large Styrofoam Floats!

Mix 5 Cylinder: Large Styrofoam Floats!

Shear Break

Shear Break

ASTM C39 Break

ASTM C39 Break

ASTM C39 Compression Test

ASTM C39 Compression Test

Flexural Mold Build

Flexural Mold Build

Flexural Mold

Flexural Mold

Flexural Test

Flexural Test

Flexural Test Specimen at Failure

Flexural Test Specimen at Failure

Haitian vs. Portland

Haitian vs. Portland

Dry Mix

Dry Mix

Fractured Cylinders

Fractured Cylinders

Coconut Break

Coconut Break

Circle Forming

Circle Forming

Forming Dome

Forming Dome

Dome Prototype

Dome Prototype

Dome Loading

Dome Loading

Dome Loading 2

Dome Loading 2

Slab Failure

Slab Failure

Slab Failure 2

Slab Failure 2

Dome Failure

Dome Failure

Slab with cover

Slab with cover

Slab Dome Cure