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|File: Newell thermallayer.jpg |Application of the Inner Thermal Layer|7| Apply the thermal layer clay mixture around the sand mound. Pound the clay downward instead of into the mound to keep the integrity of the mound intact. Work your way up the mound in about 6' layers. | |File: Newell thermallayer.jpg |Application of the Inner Thermal Layer|7| Apply the thermal layer clay mixture around the sand mound. Pound the clay downward instead of into the mound to keep the integrity of the mound intact. Work your way up the mound in about 6' layers. | ||
|File: Newell woolylayer.jpg |Application of Insulation Layer|8| Apply the 'wooly' insulation layer. | |File: Newell woolylayer.jpg |Application of Insulation Layer|8| Apply the 'wooly' insulation layer. | ||
|File: Newell outerlayer. | |File: Newell outerlayer.JPG |Application of Outer Cobb Layer|9| Before applying the outer cobb layer, cut a whole in the previous two layers for the chimney. A thick cylindrical hollow cardboard tube was used. The tube was covered with the thermal layer mixture. | ||
|File:asdklfasl.jpg |Designs molded with cobb|10| Use cobb to put designs onto the exterior of your oven. | |File:asdklfasl.jpg |Designs molded with cobb|10| Use cobb to put designs onto the exterior of your oven. | ||
|File: asldkfasldkf.jpg |Application of Lime Plaster|11| Apply a layer of lime plaster to protect the oven from the elements. | |File: asldkfasldkf.jpg |Application of Lime Plaster|11| Apply a layer of lime plaster to protect the oven from the elements. | ||
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Revision as of 04:56, 3 December 2012
Abstract
The objective of this project is to build a sustainable, beautiful, safe, long-lasting, and functional outdoor oven for baking and cooking. The project will be a collaborative effort including Laurel Tree Charter School, its students, Humboldt State University, our team, and the community to demonstrate the ability to apply sustainable practices by designing products for use in daily life.
Background
The Cobb Goblins were commissioned to design and construct an earthen pizza oven for Laurel Tree Charter School. Laurel Tree's mission is to create a sustainable model of education which provides all students with accessible curriculum, based on college preparatory standards, while developing life and socials skills in a mixed age setting.
Problem Statement and Criteria
The purpose of our design is to create a low embedded energy, natural, beautiful way to cook pizza. The oven will be used weekly for children's pizza lunches and for the occasional fundraiser.
| Criteria | Importance |
|---|---|
| Safety | 10 |
| Construction Time | 10 |
| Effectiveness | 9 |
| Durability | 8 |
| Usability | 7 |
| Sustainability | 7 |
| Aesthetics | 6 |
| Student Involvement | 6 |
| Cost | 5 |
Description of Final Project
Oven Layers
Inner Thermal Layer
This layer retains heat from firing and radiates it back into the oven chamber. The mixture recipe for this layer is 1 part clay, 1 part sand.
Insulation Layer
This wooly looking layer insulates the inner layer and keeps heat from dissipating into the environment. The mixture recipe for this layer is 1 part clay, 1 part sand, and 5 parts straw.
Outer Cobb Layer
The straw in the outer cobb layer provides the tensile strength need to make the oven sturdy. This layer is also useful for applying designs to the oven's exterior. The mixture of this layer is 3 parts clay, 3 parts sand, and 1 part straw.
Lime Plaster
Lime plaster is applied after the inner layers have fully dried. This layer protects the oven from the environment.
Materials/Costs
Results
Ovenly Inferno is successful in producing ebough pizza for the whole school during lunch time. It requires 1 ft^3 of wood to fire it in 2 hours. The oven's peak temperature is ___*F and after cooking __ pizza's the temperature is ____*F. The counter space provides adequate preparation space and the fuel is kept close in the wood storage.