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Biochar Concrete Roofing Sheets
for Nicaragua
Design Review 1
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Agenda Team Introduction Project Background Problem Statement Additional Deliverables Use Scenarios Customer Requirements Benchmarking Engineering Requirements HOQ Risks Project Plan Concerns Next Steps
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Team Intro and Roles
Peter Chynoweth - Mechanical Design Lead
Jamiya Cook - External Project Manager
Adrian Izbicki - Materials Design Lead
Cindy Widergren - Internal Project Manager
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Project Background: Nicaragua and 4 Walls
El Sauce, Nicaragua Largest country of South America Rural “cowboy” small-town atmosphere High unemployment, primarily agricultural, has
growing opportunities for economic development 4 Walls
Help families obtain their homes Build a potential small business for some people in
Nicaragua
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Project Background: Biochar Made from many types of biomass including agricultural wastes
Being tested as a component in building materials and are starting to test biochar amended with concrete
Used to improve humidity control and could potentially have many other benefits
Ithaka Institute - non-profit foundation that researches biochar teamed up with 4 Walls to see if roofs could be made from biochar
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Project Background: Biochar
http://www.terralogix.net/biochar http://biochar.ucdavis.edu/
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Problem Statement
Current State 4 Walls builds homes in Nicaragua but the roof construction is not optimal
Desired State Create roofs that are less expensive, made of local products, quieter in the rain and do not
create a large solar gain by utilizing biochar Project Goals
Analyze current roofing design Design a biochar roofing that can be made and repaired locally
Constraints Roof must be able to be built with local materials and tools for less than $400
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Deliverables
Working Roof Prototype
Test Documentation
Molds for Manufacturing
Material Mix (Biochar/Concrete)
Instructions for Installation
Schematics/Design Models
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Use Scenario: Construction of the Roof
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Customer Requirements / Interview Insights
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Benchmarking
Cost ($/sqft)
Weight (lbs)
Installed Cost per sqft ($)
Lifespan (years)
Modularity (sqft)
Wind Resistance (mph)
Metal Sheets 1 1.5 7 50 42 140
Tar Tiles 1 2 1.20 20 3 110
Clay Tiles 2.50 10 4 45 1.5 110
*Benchmarks are in America
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Engineering Requirements
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House of Quality
● Compared customer requirements to engineering requirements
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HOQ Insights
Most important ER:
Total Cost
Number of Skilled operators
Time to install roof
Tradeoffs:Add more desired features, increase costKeep in mind roof weight, dimensions, ability to hold a person, decreases install time
Takeaways:
Keep cost down
Keep installation simple
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Risks
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Current Project Plan and WBS
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Concerns
Having our first meeting with one of our main customers today Will have to ensure that all of the previous work aligns with their
requirements
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Future Plan
As a team, where do you want to be in three weeks at your next review?
a. Developing Alternatives
b. Concept Selection
c. Functional Analysis
d. Feasibility Analysis
e. Risk Assessment
f. Test Plan
Each individual team member has certain action items before the next review
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Questions?