Visiting Auroville 2020

This article will be used to collect information about my (Michael Altfield) visit to Auroville in 2020.

Auroville Earth Institute

Relevant Wiki Articles

1. Main Page
2. CEB Press
3. CEB Design
4. CEB Press Genealogy
5. Power Cube
6. Soil Mixer 2019
7. Soil Preparation for CEB
8. CEB Soil Preparation Concept

Relevant Links

1. OSE CEB Press v17.08 BOM

Relevant Photos

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Relevant Videos

TODO: video of CSEB press operation & CEB production.

Questions

Auram Press 4000

http://www.aureka.com/earth-construction-equipment/auram-press-4000-e

The Auram Press 4000 is the semi-automatic compressed earth block (CEB) press used by AVEI and built by Aureka.

Auram Press 3000

http://www.aureka.com/earth-construction-equipment/auram-press-3000

The Auram Press 4000 is a manual compressed earth block (CEB) press used by AVEI and built by Aureka.

Block Moulds

http://www.earth-auroville.com/auram_blocks_data_en.php

AVEI's Auram Press 3000 can fit 18 moulds to produce about 70 different CSEBs.

1. Which machines support the ability to use moulds that press blocks for rebar-reinforced composite CSEBs? For example, the Round 240 & Round 290?

Auramix 5000

http://www.aureka.com/earth-construction-equipment/auramix-5000

Auram Crusher

http://www.aureka.com/earth-construction-equipment/auram-crusher

The Auram Crusher is the huge machine used by AVEI and built by Aureka that crushes and screens the soil to be a uniform consistency ready to be pressed into bricks.

1. What particle size of clay soil is considered finely enough pulverized for CEB stabilization? 6 mm? 1 mm? 0.1 mm? We plan on beginning to produce our soil mixer next year, and to sell stabilized block.
2. See Soil Mixer 2019 article and ask them for tech review.

Water Resistance

1. No plaster? Really?
2. No roof? Really? Are the exposed, roof-less arches at the Auroville Visitor center made of 5% CSEB as well? Did any part of that arch use pure cement? Footer? Header? Core?
3. Have there ever been leaks in the roof of the Dhyanalinga? How was it waterproofed? Is it just CSEBs or did you use some plaster?
4. You have a CSEB soaking in water for decades? Can I see it?

Collaboration w/ OSE

1. Ask them if they are open to collaboration on a workshop where we take the two machine sets (OSE + Auroville) and compare them side by side for workflow, cost, performance. This could be the greatest CEB workshop in the world.

Business

1. Document the practical side of their block production. Do they sell their block? What does their business.model look like for selling block?
2. Document the labor requirements for a full stabilized CEB pressing operation. I'm counting from their 2 videos on the Soil Crusher and Mixer/Brick Press - that there are 15 people involved in the overall operation if soil crushing and mixing/pressing is happening, and capital cost of $48k for crushign/mixing, not counting tractor . For OSE, we need 3 people for the overall brick pressing operation, and $3k in materials for the OSE Soil Mixer crushing/mixing machine - so 24x cheaper if you build it yourself. Next step is to determine if our machine works - at the CEB build in Belize.
3. What is the cost of their semiautomatic brick press?

Other

1. Get contact information for any folks at AVEI or Aureka that have an open-source mindset.

Comparison of Machines

This section will attempt to provide a side-by-side comparison of the Auram 3000 vs Auram 4000 vs the OSE CEB Press.

TODO

1. Date of first prototype
2. cost per machine
3. cost per brick
4. theoretical bricks per hour
5. practical bricks per hour

See Also

• Auroville Earth Institute
• Soil Preparation for CEB